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Effects of Manual, Cultural, Botanical and Chemical Treatments of Termite Control in Hamelmalo Agricultural College Area 认领
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作者 Biniam Efriem Habteab Goitom +2 位作者 Rayet Idris Yosief Girmay Adungna Haile 《生态学期刊(英文)》 2021年第1期64-74,共11页
Termites are the most serious pests of field and horticultural crops, forests, and wooden household furniture. In Hamelmalo Agricultural College (HAC) the infestation of termite is very high resulting in great destruc... Termites are the most serious pests of field and horticultural crops, forests, and wooden household furniture. In Hamelmalo Agricultural College (HAC) the infestation of termite is very high resulting in great destruction of crop plants and wooden office and dormitory furniture. The devastating attack of termites should be managed by using best and ecofriendly management method. The purpose of the study was to compare the effectiveness of manual destruction of mounds and killing of termite queen and king, chemical chlorpyrifos, seed and leaves extract of neem and Lantana (as separate experiment) and smoke on termite control. Termite mounds were selected randomly inside HAC compound. The materials used were hand hoe, spade, fork, water, 20 L jar and protective clothes. The treatments were replicated three times. The botanical treatments were prepared at 2 L of highly concentrated extracts per 20 L of water each. Chlorpyrifos was applied at 20 ml per 20 L of water. Dried woody plants were used for smoke treatment. Careful digging was done to avoid king escape and queen rupture and they were killed by burning. Among all, the mechanical destruction and killing of king and queen and chlorpyrifos resulted in a complete control of the termite population. Except in the mounds treated by chlorpyrifos, the activity of termite population was very active and they closed the opened galleries immediately after treatment even though there were dead termite castes in all treatments. Living termite castes were counted by taking a medium size spade of broken mound pieces. The highest count was recorded from mounds treated by smoke. After two weeks the queen and king in every treatment mound were cheeked and killed for those who were alive. Except by the chlorpyrifos and manual destruction of mound (king and queen were killed before) all the royal families were alive and killed. Controlling of termite population in the field (outside their mound) is not possible due to the hidden foraging activity of termites, environmental safety 展开更多
关键词 Termite Castes MOUNDS CULTURAL Mechanical Chlorpyrifos Lantana Seed and Leaf Extract Neem Leaf and Seed Kernel Extract
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棉花种子活力与其植株停留期间气象因子的关系研究 认领
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作者 徐敏 李憬霖 +4 位作者 叶福民 朱鹤 金路路 单莹 王子胜 《棉花学报》 北大核心 2021年第1期75-85,共11页
【目的】探讨种子植株停留期间的气象条件对棉花种子活力的影响。【方法】本试验选择辽棉31和辽棉25两个棉花品种,利用开花当日挂花的方法,获得不同成熟度的棉花种子群体。通过研究比较群体中各样本的百粒重、7 d发芽率、主要营养成分... 【目的】探讨种子植株停留期间的气象条件对棉花种子活力的影响。【方法】本试验选择辽棉31和辽棉25两个棉花品种,利用开花当日挂花的方法,获得不同成熟度的棉花种子群体。通过研究比较群体中各样本的百粒重、7 d发芽率、主要营养成分含量以及发芽期间丙二醛(Malondialdehyde, MDA)浓度及过氧化物酶(Peroxidase, POD)、过氧化氢酶(Catalase, CAT)、超氧化物歧化酶(Superoxide dismutase, SOD)活性。【结果】棉花种子的百粒重与植株停留时间显著相关,与开花时间关系不大。辽棉31种子的粗脂肪含量显著高于辽棉25。两个品种间可溶性糖含量和淀粉含量差异不显著,且可溶性糖含量与种子的植株停留时间显著相关。种子发芽期间MDA浓度呈先升高后下降趋势,辽棉25的MDA浓度稍低于辽棉31,但两个品种间差异不显著。种子发芽期间POD活性呈先升高后下降趋势,下降较明显;CAT活性呈先下降再升高趋势,下降明显,但升高有限;SOD活性呈逐渐下降趋势,下降明显。辽棉25种子中上述3种酶的活性都稍高于辽棉31,但差异不显著。通过气象因子与种子生理生化指标的相关分析,发现降水量、≥12℃积温、日温差和日照时间等4个气象因子与种子的百粒重、可溶性糖含量、MDA浓度以及CAT活性等4个特征指标显著或极显著相关。以4个气象因子为自变量、4个种子特征指标为因变量,利用逐步回归的方法获得了25个模拟模型,对其中13个模型利用边缘分析的方法,得出4个气象因子的边际效应。【结论】种子植株停留期间的降水量、≥12℃积温、日温差和日照时间4个气象因子通过影响种子的百粒重、可溶性糖含量、MDA浓度以及CAT活性4个特征指标,进而影响到种子的总体活力,其中日温差和日照时间对种子特征指标的影响较大。辽河流域棉区棉花种子的植株停留时间以65~70 d为宜,这部分种子主要 展开更多
关键词 棉花 种子 种子活力 气象因子 生长发育
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Diversity in seed oil content and fatty acid composition in Acer species with potential as sources of nervonic acid 认领
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作者 Xing He De-Zhu Li Bo Tian 《植物多样性:英文版》 SCIE CAS 2021年第1期86-92,共7页
Nervonic acid(NA,cis-15-tetracosenoic acid)is a very long-chain monounsaturated fatty acid that has been shown to be a core component of nerve fibers and nerve cells.It can be used to treat and prevent many neurologic... Nervonic acid(NA,cis-15-tetracosenoic acid)is a very long-chain monounsaturated fatty acid that has been shown to be a core component of nerve fibers and nerve cells.It can be used to treat and prevent many neurological diseases.At present,commercially available NA is mainly derived from Acer truncatum seeds,which contain about 5%e6%NA in their seed oil.The aim of this study were to identify and analyze NA-containing Acer species that could be used as NA resource plants.For this purpose,46 Acer species seeds were collected in China and in some or all of the seed oils from these species 15 fatty acids were detected,including linoleic acid,oleic acid(C18:1D9,C18:1D11),erucic acid,palmitic acid,NA,linolenic acid(C18:3D6,9,12,C18:3D9,12,15),eicosenoic acid(C20:1D11,C20:1D13),stearic acid,behenic acid,tetracosanoic acid,arachidic acid,and docosadienoic acid.Nervonic acid was detected in all samples,but the content was highly variable among species.NA content over 9%was detected in eleven species,of which Acer elegantulum had the highest levels(13.90%).The seed oil content,seed weight,and fatty acid profiles varied among species,but the comprehensive evaluation value(W)showed that A.coriaceifolium could be a new potential NA resources plant.The results also showed that NA was significantly negatively correlated with palmitic acid,oleic acid,and eicosenoic acid,but positively correlated with eicosadienoic acid,behenic acid,erucic acid,and tetracosanoic acid,which indicate the probable pathway for NA biosynthesis in Acer plants.This study has identified Acer species that may serve as NA resources and will help guide subsequent species breeding programs. 展开更多
关键词 ACER Nervonic acid Fatty acid Seed oil Seed weight
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Tracking and Monitoring Leaf Development, Coupling Law and Regulation Techniques during Flowering Period of Hybrid Foxtail Millet (<i>Setaria italica</i>(L.) P. Beauv.) Parental Lines 认领
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作者 Qiang Li Dan Liu +5 位作者 Guoxing Ma Yanhua Shi Yanjiao Cui Xiaodong Zhang Suying Li Zhengli Liu 《农业科学(英文)》 2021年第2期84-111,共28页
The determining factor of<em> Setaria italica </em>(L.) P. Beauv. is the coupling of its flowering stage and outcrossing rate which leads to low and unstable seed yields in self-pollinated foxtail millet h... The determining factor of<em> Setaria italica </em>(L.) P. Beauv. is the coupling of its flowering stage and outcrossing rate which leads to low and unstable seed yields in self-pollinated foxtail millet hybrids and thereby limits their large-scale application. In this study, Datong 27, Datong 29 and gu 83 were screened and identified through meticulous observations of their pollination habitats. High exposure rate, degree of exposure and plump of stigma are good factors to accept foreign pollen. Datong 27 and Datong 29 have some additional characteristics, such as long filaments and exposed and full anthers that contain a large amount of pollen. We transformed into a series of stigma-exposed and plump sterile lines that easily accepted exotic pollen. New restorer lines with anthers that were full of powder and exhibited quick recovery, which improved the parental lines’ heterosexual characteristics. By tracking and monitoring the leaf development of the new sterile and restorer lines, a coupling law of leaf development was determined and a series of flowering control measures were formulated. These factors ensured that the parental lines encounter one another during the flowering stage. By utilizing fertilizer and water, the vitality of the female stigma, amount of powder scattered and powder loosening time were prolonged, which increased hybrid seed yields from 1500 to 3000 kg/hm<sup>2</sup>. These findings were helpful in resolving the technical problems of seed production that restricted the propagation of foxtail millet hybrids and supporting future large-scale applications. 展开更多
关键词 Foxtail Millet HYBRIDS Leaf Age Coupling Law Flowering Regulation Seed Production Technology
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Effect of Food Waste Compost (FWC) and its Non-Aerated Fermented Extract (NFCE) on Seeds Germination and Plant Growth 认领
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作者 Raja Jarboui Bilel Dhouib Emna Ammar 《土壤科学期刊(英文)》 2021年第2期122-138,共17页
The aim of this study was to investigate the effect of the food wastes compost (FWC) and its non-aerated fermented extract (NFCE) on seed germination and growth of tomato (<i>Solanum</i> <i>lycopersi... The aim of this study was to investigate the effect of the food wastes compost (FWC) and its non-aerated fermented extract (NFCE) on seed germination and growth of tomato (<i>Solanum</i> <i>lycopersicum</i> L.), watercress (<i>Nasturtium</i> <i>officinale</i>), chili pepper (<i>Capsicum</i> <i>annuum</i>), peas (<i>Pisum</i> <i>sativum</i> L.), chickpea (<i>Cicer</i> <i>arietinum</i>) and beans (<i>Vicia</i> <i>faba</i>) under greenhouse conditions. The FWC and NFCE were physico-chemically and microbiologically characterized. The NFCE effect was evaluated on tomato, watercress, and chili pepper seeds germination and seedling growth. However, for leguminous, pea, chickpea and bean seedlings, the FWC amended soils and irrigated with NFCE were tested for plants growth. The results of FWC analyses revealed that FWC has neutral pH, low EC and C/N ratio, with fertilizing elements (N, P, K and Mg) and lack of phytotoxic effect. The NFCE was characterized by low EC and relatively high carbon content (COD = 9700 mg/l), and intense microbial activity, notably mesophilic bacteria. Therefore, in fermented compost extract, mesophilic bacteria were increased by 225, yeasts by 25 and molds by 10 times compared to those of the investigated compost. In greenhouse, the diluted NFCE increased significantly (<i>p</i>< 0.05) germination and growth of the tested seedlings. Used alone, the FWC amended soil or the NFCE irrigated soil, improved the growth of tested seedlings. The use of soil amended with compost and irrigated by fermented compost extract decreased significantly the growth of the same experimented seedlings. Therefore, the FWC and its fermented extract were a suitable substrate for germination and growth of the studied seeds. 展开更多
关键词 Food Wastes COMPOST Fermented Compost Extract Seed Germination SEEDLING Growth
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Effectiveness of Hermetic Storage Using PICS Bags and Plastic Jars for Post-Harvest Preservation of <i>Acacia macrostachya</i>Seeds 认领
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作者 Marcellin Yamkoulga Antoine Waongo +2 位作者 Zakaria Ilboudo Fousséni Traoré Antoine Sanon 《昆虫学(英文)》 2021年第1期20-29,共10页
In Burkina Faso, the availability of <i><span style="font-family:Verdana;">Acacia</span></i><span style="font-family:Verdana;"> </span><i><span style=&q... In Burkina Faso, the availability of <i><span style="font-family:Verdana;">Acacia</span></i><span style="font-family:Verdana;"> </span><i><span style="font-family:Verdana;">macrostachya</span></i><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">“</span><span style="font-family:Verdana;">Zamnè</span><span style="font-family:Verdana;">”</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">seeds throughout the year is threatened by the attacks of pests. So, the effectiveness of airtight (hermetic) storage for the preservation of these seeds was evaluated using 20</span><span style="font-family:Verdana;">-</span><span style="font-family:Verdana;">litre plastic jars and 50 kg PICS bags as hermetic containers with 50 kg polypropylene bags as controls. Seeds of </span><i><span style="font-family:Verdana;">Acacia</span></i><span style="font-family:Verdana;"> </span><i><span style="font-family:Verdana;">macrostachya</span></i><span style="font-family:Verdana;"> (17.5 kg) were stored in each of these storage devices for six</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">months under ambient conditions in the laboratory. The number of storage pest </span><i><span style="font-family:Verdana;">Bruchidius</span></i><span style="font-family:Verdana;"> </span><i><span style="font-family:Verdana;">silaceus</span></i><span style="font-family:Verdana;"> increased significantly in polypropylene bags from 235 to 715 individuals on average/500</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">g of seeds. But in PICS bags and plastic drums, the number of this pest did not vary significantly (191 and 239 individuals on average/500</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">g of seeds for plastic jars and PICS bags respectively). In both hermetic devices, we found few individuals of another major storage pest </span><i><span style="font-family:Verdana;">Caryedon< 展开更多
关键词 Airtight Storage Acacia macrostachya Bruchidius silaceus Caryedon furcatus Seed Quality
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Seed germination and seedling emergence of four tree species of southern China in response to acid rain 认领
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作者 Matoor Mohsin Gilani Mulualem Tigabu +4 位作者 Bo Liu Taimoor Hassan Farooq Muhammad Haroon URashid Muhammad Ramzan Xiangqing Ma 《林业研究:英文版》 SCIE CAS 2021年第2期471-481,共11页
Acid rain has become a major concern due to increasing atmospheric pollution,particularly in China.We investigated whether acid rain inhibits the germination of seeds and subsequent emergence of seedling of four tree ... Acid rain has become a major concern due to increasing atmospheric pollution,particularly in China.We investigated whether acid rain inhibits the germination of seeds and subsequent emergence of seedling of four tree species from southern China:Cunninghamia lanceolata,Fokienia hodginisi,Pinus massoniana and Phoebe zhennan by simulating acid rain with pH of 2.5,3.5,4.5 and 5.5.We hypothesized that the inhibitory effect of acid rain on germination of seeds and emergence of seedling varies between species and the degree of acidity.A solution of 1 N H2SO4 and 1 N HNO 3 in the ratio of 10–1 was prepared and diluted to four pH levels,and seeds were supplied with solutions of these pH values and distilled water as control and tested for germination in a controlled growth chamber.The results revealed that simulated acid rain of pH 2.5 adversely affected the germination capacity of F.hodginisi and P.zhennan;while all acid solutions significantly increased germination of P.Massoniana;but had no effect on germination of C.Lanceolata seeds.Strong acid solution(pH of 2.5)adversely affected elongation of radicle and hypocotyl as well as fresh and dry weights of radicle and hypocotyl of tender seedlings.The result demonstrated that seedling emergence is more sensitive than seed germination to simulated acid rain,and germination of conifer species are less sensitive than broad leaved species to simulated acid rain.As a whole,acid rain of pH of 3.5 is the threshold level and acid rain below this value will have a detrimental effect on seed germination and seedling emergence. 展开更多
关键词 Cunninghamia lanceolata Fokienia hodginisi Pinus massoniana Phoebe zhennan Seed viability Simulated acid rain
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Integrative analysis of the metabolome and transcriptome reveals seed germination mechanism in Punica granatum L. 认领
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作者 FU Fang-fang PENG Ying-shu +2 位作者 WANG Gui-bin Yousry A.EL-KASSABY CAO Fu-liang 《农业科学学报:英文版》 SCIE CAS 2021年第1期132-146,共15页
We conducted an integrative system biology of metabolome and transcriptome profile analyses during pomegranate(Punica granatum L.) seed germination and utilized a weighted gene co-expression network analysis(WGCNA) to... We conducted an integrative system biology of metabolome and transcriptome profile analyses during pomegranate(Punica granatum L.) seed germination and utilized a weighted gene co-expression network analysis(WGCNA) to describe the functionality and complexity of the physiological and morphogenetic processes as well as gene expression and metabolic differences during seed germination stages. In total, 489 metabolites were detected, including 40 differentially accumulated metabolites. The transcriptomic analysis showed the expression of 6 984 genes changed significantly throughout the whole germination process. Using WGCNA, we identified modules related to the various seed germination stages and hub genes. In the initial imbibition stage(stage 1), the pivotal genes involved in RNA transduction and the glycolytic pathway were most active, while in the sprouting stage(stage 4), the pivotal genes were involved in multiple metabolic pathways. In terms of secondary metabolic pathways, we found flavonoid 4-reductase genes of anthocyanin biosynthesis pathway are most significantly affected during pomegranate seed germination, while the flavonol synthase gene was mainly involved in the regulation of isoflavonoid biosynthesis. 展开更多
关键词 seed germination stages weighted gene co-expression network analysis(WGCNA) METABOLOME TRANSCRIPTOME flavonoid pathway
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种子无刺毛野生胡萝卜雄性不育材料的创制与鉴定 认领
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作者 罗庆 孟平红 +4 位作者 钟秀来 王天文 李彤 熊爱生 谭国飞 《植物遗传资源学报》 CAS 北大核心 2021年第1期268-273,共6页
胡萝卜雄性不育使得胡萝卜杂交优势得以利用,而种子刺毛严重影响胡萝卜播种质量和效率。通常,需要在播种前去除胡萝卜种子的刺毛。胡萝卜种子无刺毛雄性不育材料对于胡萝卜遗传育种有重要的意义。本研究利用从武汉洪山地区野生胡萝卜(武... 胡萝卜雄性不育使得胡萝卜杂交优势得以利用,而种子刺毛严重影响胡萝卜播种质量和效率。通常,需要在播种前去除胡萝卜种子的刺毛。胡萝卜种子无刺毛雄性不育材料对于胡萝卜遗传育种有重要的意义。本研究利用从武汉洪山地区野生胡萝卜(武野)筛选到的雄性不育材料(武野-不育)和筛选到的种子无刺毛材料(武野-无毛)进行杂交和后代筛选,获得了种子无刺毛的雄性不育材料(命名为武野-雄无毛)。武野-雄无毛材料为典型的瓣化型雄性不育,其叶片、叶柄、茎等表现出光滑无茸毛,植株颜色为深绿色。在育性线粒体基因上,武野-雄无毛只含有短片段的atp6基因,不含长片段的atp6基因。武野-雄无毛与武野及栽培胡萝卜黑田五寸杂交,种子均表现出无刺毛特征,且获得的杂交种发芽所需时间短于武野和黑田五寸。 展开更多
关键词 胡萝卜 种子 雄性不育 刺毛 特征
向海野生翠雀高效无菌苗体系的建立 认领
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作者 鲁娜 冯思彤 +4 位作者 王宇达 张胜男 丛建民 高金秋 吴丹 《黑龙江畜牧兽医》 CAS 北大核心 2021年第1期113-117,126,164,共7页
为确立向海国家自然保护区野生翠雀高效无菌苗获得的最佳体系,试验采用NaClO消毒法对影响无菌苗获得的NaClO消毒浓度、消毒时间和培养温度进行筛选,采用激素浸种和热激解休眠法对影响种子萌发的激素种类、浸种浓度及热激处理温度、时间... 为确立向海国家自然保护区野生翠雀高效无菌苗获得的最佳体系,试验采用NaClO消毒法对影响无菌苗获得的NaClO消毒浓度、消毒时间和培养温度进行筛选,采用激素浸种和热激解休眠法对影响种子萌发的激素种类、浸种浓度及热激处理温度、时间进行筛选。结果表明:无菌水浸种、55℃热激10 min、1%NaClO消毒20 min、15℃光照培养为野生翠雀无菌苗获得的最佳体系,无菌苗获得率为90.00%。说明野生翠雀种子解休眠同消毒程序配合处理能够有效促进种子萌发并获得高效无菌苗。 展开更多
关键词 野生翠雀 种子 解休眠 消毒 无菌苗
田菁个体发育形态学研究 认领
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作者 刘新波 顾柳云 《高师理科学刊》 2021年第2期61-65,共5页
研究了田菁(Sesbania cannabina)发育形态学特征和生长发育节律.培育幼苗、成株,观察其外部形态变化,并获取解剖材料.采用石蜡切片法研究田菁营养器官的解剖结构特征.田菁种子具有硬实现象,萌发势和萌发率低;为子叶出土萌发型种子,适宜... 研究了田菁(Sesbania cannabina)发育形态学特征和生长发育节律.培育幼苗、成株,观察其外部形态变化,并获取解剖材料.采用石蜡切片法研究田菁营养器官的解剖结构特征.田菁种子具有硬实现象,萌发势和萌发率低;为子叶出土萌发型种子,适宜浅播;气温较高时,田菁营养生长较快;根系上形成大小不同的根瘤;荚果细长,种子间具横隔;为典型的异面叶,叶的上、下表皮均有气孔分布;生育期为120~150 d.为进一步开发利用田菁提供了形态学依据. 展开更多
关键词 田菁 种子 形态结构 生长发育
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干旱胁迫下华北驼绒藜种子大小及苞片对萌发和幼苗生长的影响 认领
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作者 潘慧超 王俊锋 +1 位作者 敖云娜 穆春生 《应用生态学报》 CAS 北大核心 2021年第2期399-405,共7页
干旱是影响荒漠区植物种子萌发和幼苗生长的关键因素。以多年生强旱生半灌木华北驼绒藜为对象,研究了不同干旱程度(0、100、200、300和400 g·L^(-1) PEG6000)下,种子大小及苞片有无对种子萌发及幼苗生长的影响。结果表明:干旱胁迫... 干旱是影响荒漠区植物种子萌发和幼苗生长的关键因素。以多年生强旱生半灌木华北驼绒藜为对象,研究了不同干旱程度(0、100、200、300和400 g·L^(-1) PEG6000)下,种子大小及苞片有无对种子萌发及幼苗生长的影响。结果表明:干旱胁迫显著抑制了种子萌发和幼苗地上部的生长。100和200 g·L^(-1) PEG6000处理显著增加了幼苗根长,而300和400 g·L^(-1) PEG6000处理显著降低了幼苗根长。与无苞片相比,有苞片使种子的发芽率显著降低12%,发芽指数显著降低50.5%,幼苗的地上部长度显著增加20.8%,幼苗根长显著增加6.3%。种子大小对种子发芽指数无显著影响,但与小种子相比,大种子发芽率显著提高3%,幼苗的地上部长度显著增加20.5%,幼苗根长显著增加33.0%。在干旱条件下,苞片能延缓种子的萌发速度,种子大小能影响后代的存活几率,二者共同影响华北驼绒藜对极端干旱环境的适应性。 展开更多
关键词 华北驼绒藜 干旱 种子 苞片 发芽 幼苗
底质类型对热带海草海菖蒲种子萌发和幼苗生长的影响 认领
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作者 刘松林 江志坚 +2 位作者 吴云超 张霞 黄小平 《应用海洋学学报》 北大核心 2021年第1期74-81,共8页
近几十年来,受到人类活动和气候变化的影响,全球海草床呈现退化趋势,海草床的恢复备受关注。其中,海草种子或幼苗移植由于其对供体海草床破坏和影响较小,并能保证海草的遗传多样性而备受重视。移植区的底质类型是决定海草种子或幼苗移... 近几十年来,受到人类活动和气候变化的影响,全球海草床呈现退化趋势,海草床的恢复备受关注。其中,海草种子或幼苗移植由于其对供体海草床破坏和影响较小,并能保证海草的遗传多样性而备受重视。移植区的底质类型是决定海草种子或幼苗移植存活率的重要因子,然而,目前关于热带海草种子萌发和幼苗生长对不同底质类型响应的研究很有限。本研究以热带海草海菖蒲(Enhalus acoroides)种子为研究对象,利用室内模拟实验,分别设置细砂和砂砾底质的处理,探讨不同底质类型对海菖蒲种子萌发和幼苗生长的影响。研究发现,细砂组和砂砾组的萌发率和萌发历期的平均值分别96.3%、3.6 d和95.0%、3.4 d,两个处理组之间差异不显著。萌发后的细砂组海菖蒲幼苗的存活率为97.37%,而砂砾组的幼苗存活率仅为81.58%;另外,海菖蒲幼苗的叶片长度、根长度、叶片生长速率和根生长速率在细砂组均显著高于砂砾组。因此,沉积物粒径的差异对海草种子的萌发率和萌发时间没有显著性影响,但沉积物粒径增大会显著降低萌发后海菖蒲幼苗的存活率和生长速率。因此,未来开展海菖蒲种子或幼苗的野外移植,应选取沉积物粒径较小细砂质区域进行移植,可促进海菖蒲种子或幼苗移植的成活率,提高海菖蒲生态修复的成功率。 展开更多
关键词 海洋生物学 海菖蒲 底质类型 种子 萌发 幼苗
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藜麦种子EMS诱变条件初探 认领
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作者 王育川 董艳辉 +8 位作者 温鑫 李亚莉 侯丽媛 刘江 赵菁 曹秋芬 黄春国 吴慎杰 秦永军 《种子》 北大核心 2021年第1期88-94,共7页
为了确定藜麦种子EMS诱变处理的最佳条件,以自育白种藜麦种子为实验材料,设置5个浓度梯度(0.5%、1%、1.5%、2%、2.5%)的EMS缓冲液和4个时间梯度(8 h、10 h、12 h、14 h)进行诱变处理,通过连续观察种子发芽情况及生长状况,统计相关萌发指... 为了确定藜麦种子EMS诱变处理的最佳条件,以自育白种藜麦种子为实验材料,设置5个浓度梯度(0.5%、1%、1.5%、2%、2.5%)的EMS缓冲液和4个时间梯度(8 h、10 h、12 h、14 h)进行诱变处理,通过连续观察种子发芽情况及生长状况,统计相关萌发指标,最终确定半致死剂量。结果表明,藜麦种子对低浓度EMS不敏感;高浓度EMS抑制藜麦种子发芽势和发芽率,且对种子发芽有一定的延迟作用;EMS缓冲液浓度、处理时间以及二者的互作对种子发芽势和发芽率均有显著影响;蒸馏水浸种2 h后,1.5%EMS浓度处理12 h为诱变的最佳条件,其相对致死率为48.7%;另外,2%、8 h及2%、10 h相对致死率较接近半致死剂量,为可选择的组合。 展开更多
关键词 藜麦 种子 EMS(甲基磺酸乙酯)诱变 半致死剂量
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光谱检测技术在种子质量检测中的应用 认领
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作者 张伏 张朝臣 +2 位作者 陈自均 滕帅 徐锐良 《中国农机化学报》 北大核心 2021年第2期109-114,共6页
种子质量是影响作物产量关键因素之一,而传统种子质量检测方法难以满足其快速检测的要求,采用光谱检测技术可有效降低种子检验成本、提高检验效率。以玉米种子为研究对象,基于玉米种子光谱检测流程,阐述光谱检测技术在玉米种子活力、含... 种子质量是影响作物产量关键因素之一,而传统种子质量检测方法难以满足其快速检测的要求,采用光谱检测技术可有效降低种子检验成本、提高检验效率。以玉米种子为研究对象,基于玉米种子光谱检测流程,阐述光谱检测技术在玉米种子活力、含水率与病害、品种与产地等方面的研究现状及现存问题。光谱检测技术已应用于玉米种子质量检测,预测模型的准确率90%左右,但存在着系统性不够,应用局限性、数据处理效率低等问题,从研究系统化、增强实用性、融合新算法等方面分析光谱检测技术在玉米种子质量检测中的发展趋势。光谱检测技术应用于种子质量检验具有重要的理论和实际意义。 展开更多
关键词 种子 质量 检测 近红外光谱技术 高光谱成像技术
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云南翠雀花繁育生物学特性研究 认领
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作者 周丽 隆林 +2 位作者 王苑 龙林梅 代方丹 《兴义民族师范学院学报》 2021年第1期119-124,共6页
以云南翠雀花种子为材料,研究了不同种子成熟度和不同贮藏时间对种子萌发影响、不同栽培基质对根生长量的影响,探究了人工授粉及根茎育苗。结果表明:种子没有休眠特性,新鲜的成熟种子和半成熟种子均可以萌发,萌发率分别为99.17%和72.50%... 以云南翠雀花种子为材料,研究了不同种子成熟度和不同贮藏时间对种子萌发影响、不同栽培基质对根生长量的影响,探究了人工授粉及根茎育苗。结果表明:种子没有休眠特性,新鲜的成熟种子和半成熟种子均可以萌发,萌发率分别为99.17%和72.50%;干燥种子随着贮藏时间增加萌发率逐渐下降,半年后为53.15%,一年后仅为12.5%;疏松的栽培基质有利于增加产量;人工授粉可以产生有效种子,但效率不高;充分利用根茎部的芽繁殖可以得到大量健壮小苗和提高产量。通过研究云南翠雀花的繁育生物学特性,为该药材的人工栽培和保育提供有效指导。 展开更多
关键词 云南翠雀花 种子 繁殖 萌发率
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关于包衣剂在灌木植物荆条上应用的文献分析 认领
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作者 毛伟伟 王璇 《辽宁大学学报:自然科学版》 CAS 2021年第1期18-27,共10页
种子包衣剂能有效改善种子质量,提高种子发芽率,促进幼苗生长,而且使用方法简便.目前,包衣剂普遍应用于农业作物,而在木本植物的应用性研究很少.荆条(Vitex negundo L.var.heterophylla(Franch.)Rehd.)属于灌木植物,是生态修复优势植物... 种子包衣剂能有效改善种子质量,提高种子发芽率,促进幼苗生长,而且使用方法简便.目前,包衣剂普遍应用于农业作物,而在木本植物的应用性研究很少.荆条(Vitex negundo L.var.heterophylla(Franch.)Rehd.)属于灌木植物,是生态修复优势植物种,但其种子存在种皮质地坚硬,透气透水性较差,发芽率偏低的问题.选择灌木荆条为研究对象,运用文献计量法,基于CNKI数据库,以荆条、包衣剂和生态修复为关键词,检索1999年至2019年间国内发表有关荆条以及种子包衣剂的期刊论文,分别从各年发表文献数量、研究机构、来源期刊、空间分布、论文作者、以及研究方法等多个角度分析国内外该范围内的研究进展以及发展趋势.根据其分析研究结果,探讨在灌木荆条种子上应用包衣剂进行相关实验与研究的可行性. 展开更多
关键词 荆条 文献计量法 种子 包衣剂
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珍贵树种火力楠实生天然更新研究 认领
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作者 方小玉 申文辉 《防护林科技》 2021年第1期1-3,共3页
通过林分样地调查和模拟天然更新发芽试验,研究珍贵树种火力楠(Michelia macclurei)实生天然更新情况,为火力楠可持续经营和种质资源保护等提供理论依据。结果显示:广西壮族自治区火力楠8个成熟人工林分林下天然更新实生苗木密度250~400... 通过林分样地调查和模拟天然更新发芽试验,研究珍贵树种火力楠(Michelia macclurei)实生天然更新情况,为火力楠可持续经营和种质资源保护等提供理论依据。结果显示:广西壮族自治区火力楠8个成熟人工林分林下天然更新实生苗木密度250~4000株·hm^(-2),平均更新密度1395株·hm^(-2);更新频度6.7%~66.7%,平均更新频度35.9%,实生天然更新等级为坏等级。天然更新苗木高度大部分为10 cm,地径0.1 cm,苗木规格小。2年度2批次播撒2000粒火力楠种子林下模拟天然更新成苗率为0。扩大火力楠森林面积规模需要采取人工造林措施。 展开更多
关键词 火力楠 种子 人工林 天然更新
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Infrared Spectroscopy and Morphological Assessments on the Nutritional Value of Prickly Pear Fruit 认领
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作者 Moamen SRefat Amnah MAlsuhaibani Mo hamed Nagaty 《光谱学与光谱分析》 SCIE EI CAS 北大核心 2021年第2期648-653,共6页
The prickly pear fruit helps in combating viral based infections.It is used to treat diabetes and declared to possess hypoglycemic effects.There is also record of the usage of the fruit in the olden days as a remedy f... The prickly pear fruit helps in combating viral based infections.It is used to treat diabetes and declared to possess hypoglycemic effects.There is also record of the usage of the fruit in the olden days as a remedy for diabetes,lipid disorders,inflammation,ulcers,and pharmacologic side effects.The chemical composition and nutritional values of skin,flesh and seed of prickly pear fruit were investigated and discussed on a dry weight situation.The infrared spectra as well as scanning electron microscopy(SEM)techniques were used to identify the functional groups of carbohydrates,amino acids,and protein.The infrared spectral data of all three(skin,flesh,and seeds)species were recorded and assigned to the presence of distinguish peaks that referred to the three different sugars(glucose,fructose and saccharose)and cyclic aliphatic hydrocarbons moieties.On the other hand,the SEM is a powerful tool to investigate the morphological features of the components.SEM assays were examined on the surfaces of skin,flesh and seed branches showing a small particle that tends to form clusters with different shapes compared to each other.The Energy-dispersive X-ray spectroscopy(EDX)is an analytical technique used for the elemental analysis or chemical characterization of a sample.The EDX spectral technique of the skin,flesh and seeds were confirmed the presence of different essential and useful elements such as carbon,oxygen,magnesium,calcium,potassium,sulfur,aluminum,silicon,chloride,and phosphorus. 展开更多
关键词 Infrared spectroscopy SEM EDX Prickly pear fruit SKIN FLESH SEED
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Control of Southern Root-knot Nematodes on Tomato and Regulation of Soil Bacterial Community by Biofumigation with Zanthoxylum bungeanum Seed 认领
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作者 Xiaoyun Wang Wencong Shi +4 位作者 Jilei Wang Zheng Gao Shuang Li Ningxin Wang Qinghua Shi 《Horticultural Plant Journal(园艺学报:英文版)》 SCIE 2021年第1期49-58,共10页
Biofumigation is an environmentally friendly strategy used to control nematodes and plant diseases.The volatile oil of Zanthoxylum bungeanum has high insecticidal and antibacterial activity.However,it is not known if ... Biofumigation is an environmentally friendly strategy used to control nematodes and plant diseases.The volatile oil of Zanthoxylum bungeanum has high insecticidal and antibacterial activity.However,it is not known if the seed of Z.bungeanum is a suitable material for biofumigation to control southern root-knot nematodes(SRKN)on tomato,and how it may regulate the soil bacterial community structure.We used pot experiments in the greenhouse to determine the effects of Z.bungeanum seeds on SRKN,plant growth parameters,soil physicochemical and microbial characteristics.A total of 26 volatile components,including nematicidally active substances,were identified from Z.bungeanum seeds.Z.bungeanum seed biofumigation significantly reduced the SRKN population by 88.89%and 81.55%on the 50th and 100th day after transplanting,respectively.Compared to the control,the total soluble sugar,soluble solids,soluble protein,titratable acid,root activity and the fruit yield per tomato plant increased significantly.The content of soil alkali-hydrolyzed nitrogen,available potassium and the soil enzyme activities were also significantly increased.The soil bacterial diversity and the co-occurrence network complexity were increased by Z.bungeanum seed biofumigation.Relativelymore keystone OTUs in biofumigation soil had potential plant growth-promoting capabilities.The function of Z.bungeanum seed increasing tomato production in SRKN-infected soil depends on directly killing SRKN and improving soil properties.These results indicate that Z.bungeanum seed can be used as both a nematicide and a high quality organic fertilizer in tomato production. 展开更多
关键词 biofumigant Zanthoxylum bungeanum seed root-knot nematode TOMATO soil bacterial community
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