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Protein microarray analysis of cytokine expression changes in distal stumps after sciatic nerve transection 预览
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作者 Xiao-Qing Cheng Xue-Zhen Liang +9 位作者 Shuai Wei Xiao Ding Gong-Hai Han Ping Liu Xun Sun Qi Quan He Tang Qing Zhao Ai-Jia Shang Jiang Peng 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第3期503-511,共9页
A large number of chemokines,cytokines,other trophic factors and the extracellular matrix molecules form a favorable microenvironment for peripheral nerve regeneration.This microenvironment is one of the major factors... A large number of chemokines,cytokines,other trophic factors and the extracellular matrix molecules form a favorable microenvironment for peripheral nerve regeneration.This microenvironment is one of the major factors for regenerative success.Therefore,it is important to investigate the key molecules and regulators affecting nerve regeneration after peripheral nerve injury.However,the identities of specific cytokines at various time points after sciatic nerve injury have not been determined.The study was performed by transecting the sciatic nerve to establish a model of peripheral nerve injury and to analyze,by protein microarray,the expression of different cytokines in the distal nerve after injury.Results showed a large number of cytokines were up-regulated at different time points post injury and several cytokines,e.g.,ciliary neurotrophic factor,were downregulated.The construction of a protein-protein interaction network was used to screen how the proteins interacted with differentially expressed cytokines.Kyoto Encyclopedia of Genes and Genomes pathway and Gene ontology analyses indicated that the differentially expressed cytokines were significantly associated with chemokine signaling pathways,Janus kinase/signal transducers and activators of transcription,phosphoinositide 3-kinase/protein kinase B,and notch signaling pathway.The cytokines involved in inflammation,immune response and cell chemotaxis were up-regulated initially and the cytokines involved in neuronal apoptotic processes,cell-cell adhesion,and cell proliferation were up-regulated at 28 days after injury.Western blot analysis showed that the expression and changes of hepatocyte growth factor,glial cell line-derived neurotrophic factor and ciliary neurotrophic factor were consistent with the results of protein microarray analysis.The results provide a comprehensive understanding of changes in cytokine expression and changes in these cytokines and classical signaling pathways and biological functions during Wallerian degeneration,as well as a bas 展开更多
关键词 cytokines DISTAL stump gene ontology KYOTO ENCYCLOPEDIA of Genes and Genomes pathway peripheral nerve injury protein microarray PROTEIN-PROTEIN interaction network Wallerian degeneration
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p16、p53和Ki-67在子宫平滑肌肿瘤中的诊断价值
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作者 张彦宁 王翠芝 +1 位作者 魏雪静 金木兰 《诊断病理学杂志》 2019年第5期288-291,273共5页
目的研究p16、p53和Ki-67在子宫平滑肌肿瘤中的表达情况并探讨其在子宫平滑肌肿瘤鉴别诊断中的意义。方法收集35例子宫平滑肌瘤,13例恶性潜能不确定的子宫平滑肌肿瘤(STUMP)和16例子宫平滑肌肉瘤(LMS),采用免疫组化法检测p16、p53和Ki-6... 目的研究p16、p53和Ki-67在子宫平滑肌肿瘤中的表达情况并探讨其在子宫平滑肌肿瘤鉴别诊断中的意义。方法收集35例子宫平滑肌瘤,13例恶性潜能不确定的子宫平滑肌肿瘤(STUMP)和16例子宫平滑肌肉瘤(LMS),采用免疫组化法检测p16、p53和Ki-67在这64例子宫平滑肌肿瘤中表达的情况。11例STUMP得到随访。结果 p16在100%的平滑肌肉瘤、7.7%的STUMP和0%的子宫平滑肌瘤中弥漫强(+)。p53在25%的平滑肌肉瘤、7.7%的STUMP和0%的子宫平滑肌瘤中弥漫强(+)。LMS的Ki-67阳性率15%~70%。1例(7.7%)STUMP的Ki-67阳性率达到20%,其余92.3%的STUMP和100%的子宫平滑肌瘤均<5%。1例STUMP发生多发肝转移,转移的肿瘤形态符合平滑肌肉瘤,ER、PR、p16和p53弥漫强(+),Ki-67阳性率20%,免疫组化与原子宫内STUMP一致。结论 p53和p16可用于子宫平滑肌肉瘤与良性子宫平滑肌肿瘤的鉴别。弥漫强阳的阳性方式才有诊断意义,提示肿瘤恶性。在STUMP中,较高的细胞增殖指数Ki-67(>15%)提示恶性可能,但需要结合组织形态及p16和p53的表达情况综合考虑。 展开更多
关键词 P16 P53 KI-67 子宫平滑肌肿瘤 STUMP
柠条的浴火重生 预览
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作者 王俊杰 《甘肃林业科技》 2019年第3期17-18,共2页
发现火烧迹地上柠条萌蘖暴发,长势茁壮,认为柠条具有浴火重生的特性。利用野火选择与生态系统适应理论,解释了柠条萌蘖力强、易燃特性的起源及其生态学意义;利用细胞分裂素阈值假说解释了柠条平茬复壮机制,以及火烧平茬的生物学意义。... 发现火烧迹地上柠条萌蘖暴发,长势茁壮,认为柠条具有浴火重生的特性。利用野火选择与生态系统适应理论,解释了柠条萌蘖力强、易燃特性的起源及其生态学意义;利用细胞分裂素阈值假说解释了柠条平茬复壮机制,以及火烧平茬的生物学意义。经受野火,柠条焕然一新,生机茁壮。 展开更多
关键词 柠条 易燃 火烧 平茬 萌蘖 不定芽
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Lengthening of a below knee amputation stump with Ilizarov technique in a patient with a mangled leg
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作者 Dong Hao Toon Suheal Ali Khan Kevin Ho Yin Wong 《中华创伤杂志:英文版》 CAS CSCD 2019年第6期364-367,共4页
A below knee amputation(BKA)requires sufficient stump length for the fitting of a modern prosthesis.In cases of trauma where the levels of injury are unpredictable,achieving sufficient stump length can be a challenge.... A below knee amputation(BKA)requires sufficient stump length for the fitting of a modern prosthesis.In cases of trauma where the levels of injury are unpredictable,achieving sufficient stump length can be a challenge.We described a case report of using the Ilizarov technique for bone lengthening at the residual BKA stump for a patient who sustained a mangled limb following a road traffic accident.Using this technique,we have successfully lengthened the tibial stump adequately for a functioning prosthesis.As shown in this case,we believe that this technique could attain an excellent outcome for a selected group of patients with short residual BKA stump. 展开更多
关键词 Below knee amputation Stump lengthening Ilizarov technique
Surgical resection of gastric stump cancer following proximal gastrectomy for adenocarcinoma of the esophagogastric junction 预览
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作者 Fu-Hai Ma Li-Yan Xue +7 位作者 Ying-Tai Chen Wei-Kun Li Yang Li Wen-Zhe Kang Yi-Bin Xie Yu-Xin Zhong Quan Xu Yan-Tao Tian 《世界胃肠肿瘤学杂志:英文版(电子版)》 CAS 2019年第5期416-423,共8页
BACKGROUND Proximal gastrectomy (PG) is performed widely as a function-preserving operation for early gastric cancer located in the upper third of the stomach and is an important function-preserving approach for esoph... BACKGROUND Proximal gastrectomy (PG) is performed widely as a function-preserving operation for early gastric cancer located in the upper third of the stomach and is an important function-preserving approach for esophagogastric junction (EGJ) adenocarcinoma. The incidence of gastric stump cancer (GSC) after PG is increasing. However, little is known about the GSC following PG because very few studies have been conducted on the disease. AIM To clarify clinicopathologic features, perioperative complications, and long-term survival rates after the resection of GSC following PG. METHODS Data for patients with GSC following PG for adenocarcinoma of the EGJ diagnosed between January 1998 and December 2016 were retrospectively reviewed. Multivariate analysis was performed to identify factors associated with overall survival (OS). GSC was defined in accordance with the Japanese Gastric Cancer Association. RESULTS A total of 35 patients were identified. The median interval between the initial PG and resection of GSC was 4.9 (range 0.7-12) years. In 21 of the 35 patients, the tumor was located in a nonanastomotic site of the gastric stump. Total gastrectomy was performed in 27 patients;the other 8 underwent partial gastrectomy. Postoperative complications occurred in 6 patients (17.1%). The tumor stage according to the depth of tumor invasion was T1 in 6 patients, T2 in 3 patients, T3 in 9 patients, and T4 in 17 patients. Lymph node metastasis was observed in 18 patients. Calculated 1-, 3-, and 5-year OS rates were 86.5%, 62.3%, and 54.2%, respectively. Multivariate analysis showed advanced T stage to be associated with OS. CONCLUSION This study reveals the characteristics of GSC following PG for adenocarcinoma of the EGJ and suggests that a surgical approach can lead to a satisfactory outcome. 展开更多
关键词 GASTRIC stump cancer PROXIMAL GASTRECTOMY Esophagogastric JUNCTION DISTAL GASTRECTOMY
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Post-operative computed tomography scan – reliable tool for quality assessment of complete mesocolic excision 预览
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作者 Cristian Livadaru Stefan Morarasu +7 位作者 Tudor Cristian Frunza Florina A Ghitun Elena Florina Paiu-Spiridon Florina Sava Cristina Terinte Dan Ferariu Sorinel Lunca Gabriel Mihail Dimofte 《世界胃肠肿瘤学杂志:英文版(电子版)》 CAS 2019年第3期208-226,共19页
BACKGROUND Quality control in colon cancer surgery is an ongoing debate ever since standardization proved to be highly efficient in improving survival in rectal cancer. Complete mesocolic excision(CME) is widely accla... BACKGROUND Quality control in colon cancer surgery is an ongoing debate ever since standardization proved to be highly efficient in improving survival in rectal cancer. Complete mesocolic excision(CME) is widely acclaimed as the new goldstandard in colon cancer resections, thus it is imperative to establish quality criteria of CME in order to make it easily understood and verified by surgeons worldwide. One simple and reproducible tool could be the measurement of arterial stumps postoperatively and a straightforward way to test its reliability is to test it in a comparative study between CME and non-CME surgery.AIM To validate arterial stump measurement as a surgical quality tool by comparing CME with conventional radical colectomies.METHODS This was a retrospective study, carried out on a prospective database. We collected data from two groups of patients, divided according to standard CME with D2 central vascular ligation(group A) and non-standardized surgery(group B). The two groups were compared with regard to the arterial stump length after right-and left-sided colectomies for colon cancer. The actual stump lengths of the ileocolic artery(ICA) and inferior mesenteric artery(IMA) were compared with their theoretical best D2 position of predicted ligation levels(D2 PLLs) for calculating the potential for improvement. Measurements on follow-up computed tomography scans were carried out by three observers. Pathological data were recorded(specimen length, lymph node yield) and correlated with stump length.RESULTS We analysed 58 colectomies. The stump lengths(mean ± SD) in group A were16.97 ± 4.77 mm for ICA and 31.70 ± 15.71 mm for IMA, whereas group B had 49.93 ± 20.29 mm for ICA and 67.24 ± 28.71 mm for IMA. Shorter lengths were obtained in group A, by a mean difference of 35.66 mm(χ~2 = 27.38, P < 0.001),which was significant for all types of colectomies. Except for a 5.85 ± 4.71 mm difference for right colectomies, all the ligations from group A significantly reached their potential height(0.26 ± 12.1 展开更多
关键词 Complete mesocolic EXCISION Central vascular LIGATION COLON surgery Arterial stump measurement COMPUTED tomography
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中国沙棘人工林适宜平茬高度的探讨 预览
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作者 高海银 刘春红 +4 位作者 李倩 王长成 武小春 吉生丽 李根前 《西南林业大学学报》 CAS 北大核心 2019年第5期15-20,共6页
采用单因素回归设计,在系统分析萌蘖更新效果对平茬高度响应规律的基础上,建立了萌蘖再生率与平茬高度的回归方程,据此确定适宜的平茬高度。结果表明:随着平茬高度的增大,伐桩萌蘖存活率、根系萌蘖数量以及萌蘖生长、克隆扩散、生物量... 采用单因素回归设计,在系统分析萌蘖更新效果对平茬高度响应规律的基础上,建立了萌蘖再生率与平茬高度的回归方程,据此确定适宜的平茬高度。结果表明:随着平茬高度的增大,伐桩萌蘖存活率、根系萌蘖数量以及萌蘖生长、克隆扩散、生物量积累能力先升后降(或先升后稳),平茬高度为10 cm时最大。再生率与平茬高度的关系可用二次抛物线拟合,根据回归方程求导,最有利于中国沙棘人工林迅速恢复的平茬高度为10.0~12.0 cm,结果一致。 展开更多
关键词 中国沙棘 人工林 平茬 萌蘖 克隆 生物量
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恶性潜能未定子宫平滑肌瘤临床表现及诊治方法分析 预览
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作者 陈圆 王树鹤 《武警医学》 CAS 2018年第3期257-259,263共4页
目的探讨梭形细胞分化的恶性潜能未定子宫平滑肌肿瘤(uterine smooth muscle tumor of uncertain malignant potential,STUMP)的临床表现、辅助检查及诊断方法。方法选取2009-01至2015-12在医院妇科接受手术治疗的梭形细胞分化的STUM... 目的探讨梭形细胞分化的恶性潜能未定子宫平滑肌肿瘤(uterine smooth muscle tumor of uncertain malignant potential,STUMP)的临床表现、辅助检查及诊断方法。方法选取2009-01至2015-12在医院妇科接受手术治疗的梭形细胞分化的STUMP患者,病理科医师采用同一诊断标准对病理切片再次复核。通过搜集临床资料进行回顾性研究。结果共23例,均为育龄期或围绝经期女性,年龄41-50岁的占60.9%;均表现出与子宫肌瘤或肉瘤相似的临床症状,但以月经量增多,经期延长者最多见(56.5%);22例术前超声将该肿瘤诊断为良性平滑肌瘤,1例被诊断为卵巢肿物;术中见肿瘤多生长于宫体肌壁间(60.9%);最大径线2-16 cm,平均6.4 cm;剖面与良性子宫肌瘤类似。结论 STUMP患者的年龄分布、临床表现、超声声像图等均与良性子宫平滑肌瘤更为相似,术前难以区分,确诊仍需依靠病理学检查。 展开更多
关键词 恶性潜能未定子宫平滑肌肿瘤 STUMP 临床诊断
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Neuroendocrine carcinoma of the gastric stump:A case report and literature review 预览
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作者 Fu-Hai Ma Li-Yan Xue +4 位作者 Ying-Tai Chen Yi-Bin Xie Yu-Xin Zhong Quan Xu Yan-Tao Tian 《世界胃肠病学杂志:英文版》 SCIE CAS 2018年第4期543-548,共6页
We herein report a case of neuroendocrine carcinoma of the gastric stump found 47 years after Billroth II gastric resection for a benign gastric ulcer.A 74-yearold man was referred to another hospital with melena.Endo... We herein report a case of neuroendocrine carcinoma of the gastric stump found 47 years after Billroth II gastric resection for a benign gastric ulcer.A 74-yearold man was referred to another hospital with melena.Endoscopic examination revealed a localized ulcerative lesion at the gastrojejunal anastomosis.The diagnosis by endoscopic biopsy was neuroendocrine carcinoma.A total gastrectomy of the remnant stomach with D2 lymphadenectomy was performed at our hospital.The lesion invaded the subserosa,and metastasis was found in two of nine the lymph nodes retrieved.The lesion was positive for synaptophysin and chromogranin A,and the Ki-67 labeling index was 60%.The diagnosis of neuroendocrine carcinoma of the gastric stump was confirmed using World Health Organization 2010 criteria.Subsequently,the patient underwent one course of adjuvant chemotherapy with the etoposide plus cisplatin(EP)regimen;however,treatment was discontinued due to grade 3 myelosuppression.The patient showed lymph node metastasis in the region around the gastrojejunal anastomosis in the abdominal cavity 7 mo post-surgery.He then underwent radiotherapy and platinum-based combination chemotherapy;however,the disease progressed and liver recurrence was observed on follow-up computed tomography at 16 mo post-surgery.The patient then received chemotherapy with regimens used for the treatment of small cell lung cancer in first-and secondline settings.The patient died of disease progression 31 months after surgery. 展开更多
关键词 GASTRIC stump GASTRIC stump CANCER NEUROENDOCRINE CARCINOMA
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张北坝上地区杨树萌芽更新规律研究 预览
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作者 王冉 王川 +4 位作者 许中旗 丁丽 赵娱 闫腾飞 郭延朋 《林业与生态科学》 2018年第3期295-299,共5页
为了对坝上地区退化杨树防护林进行更新改造,对张北小二台镇杨树皆伐迹地伐桩萌生条的生长状况进行了调查,以探究其更新规律。研究结果表明:在所调查的伐桩直径范围内,萌生条数量与伐桩直径呈显著的正相关关系;萌生条直径与伐桩直径无... 为了对坝上地区退化杨树防护林进行更新改造,对张北小二台镇杨树皆伐迹地伐桩萌生条的生长状况进行了调查,以探究其更新规律。研究结果表明:在所调查的伐桩直径范围内,萌生条数量与伐桩直径呈显著的正相关关系;萌生条直径与伐桩直径无显著相关关系,而与萌生条数量及竞争指数存在显著的负相关关系;萌生能力综合指标与伐桩直径之间存在极显著的正相关关系(P〈0.01),伐桩直径越大,其萌生能力越强。在张北坝上地区退化杨树防护林的改造中,可充分利用衰退杨树伐桩的萌蘖能力进行更新,并通过萌条数量的控制对萌条的生长进行调节,以形成生长迅速、长势良好的植株。 展开更多
关键词 杨树 伐桩 萌芽更新 竞争强度
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平茬措施对柠条生长和土壤水分的影响研究 预览
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作者 李振峰 康永前 +4 位作者 何榛 薛睿 马驰 刘燕萍 莫保儒 《甘肃林业科技》 2018年第2期4-7,12共5页
选择完整坡面成熟柠条林布设不同平茬措施的试验样地,2016~2017年连续对林地土壤水分和灌丛生长情况开展调查,对不同平茬措施林地土壤水分和植丛生长的差异性进行分析研究。结果表明:隔行平茬萌蘖、生长优于隔丛和隔丛隔行平茬;柠条平... 选择完整坡面成熟柠条林布设不同平茬措施的试验样地,2016~2017年连续对林地土壤水分和灌丛生长情况开展调查,对不同平茬措施林地土壤水分和植丛生长的差异性进行分析研究。结果表明:隔行平茬萌蘖、生长优于隔丛和隔丛隔行平茬;柠条平茬初期对减缓土壤水分消耗具有明显的效果,且隔行和隔行+隔丛平茬这种效果更为明显;半干旱黄土区柠条林长期在土壤水分亏缺状态下维持生长,仅凭平茬措施无法彻底解决人工柠条林土壤水分亏缺状态。 展开更多
关键词 柠条 平茬 生长 土壤水分
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Balloon-occluded transcatheter arterial chemoembolization for hepatocellular carcinoma 预览
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作者 Takeshi Hatanaka Hirotaka Arai Satoru Kakizaki 《世界肝病学杂志:英文版(电子版)》 2018年第7期485-495,共11页
Transcatheter arterial chemoembolization(TACE)is widely accepted as a treatment for patients with hepatocellular carcinoma(HCC)in the intermediate stage according to the Barcelona Clinic Liver Cancer(BCLC)guidelines.R... Transcatheter arterial chemoembolization(TACE)is widely accepted as a treatment for patients with hepatocellular carcinoma(HCC)in the intermediate stage according to the Barcelona Clinic Liver Cancer(BCLC)guidelines.Recently,balloon-occluded TACE(B-TACE)was developed in Japan.Despite the lack of a clear definition,B-TACE is generally defined as the infusion of emulsion of chemotherapeutic agents with lipiodol followed by gelatin particles under the occlusion of feeding arteries by a microballoon catheter,which leads to the dense lipiodol emulsion(LE)accumulation in HCC nodules.This phenomenon cannot be explained only by the prevention of proximal migration and leakage of embolization materials;it further involves causing local changes in the hemodynamics of the surrounding occlusion artery and targeted HCC nodules.Balloon-occluded arterial stump pressure plays an important role in the dense LE accumulation in targeted HCC nodules.Although randomized controlled trials comparing the therapeutic effect and the prognosis of B-TACE to those of the other TACE procedures,such as conventional-TACE and drug-eluting beads TACE,are still lacking,B-TACE is thought to be a promising treatment.The purpose of this review is to summarize the mechanism,therapeutic effect,indication,prognosis and complications of B-TACE. 展开更多
关键词 Hepatocellular carcinoma Treatment effect TRANSCATHETER ARTERIAL CHEMOEMBOLIZATION Prognosis Balloon-occluded ARTERIAL stump pressure Dense LIPIODOL emulsion accumulation Balloon-occluded TRANSCATHETER ARTERIAL CHEMOEMBOLIZATION Microballoon catheter
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不同手术方法治疗恶性潜能未定型子宫平滑肌肿瘤的术后复发率分析 被引量:2
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作者 陈圆 赵蓉 王树鹤 《中国妇产科临床杂志》 CSCD 北大核心 2017年第1期26-28,共3页
目的探讨不同手术方法治疗梭型细胞分化的恶性潜能未定型子宫平滑肌肿瘤的术后复发情况。方法选取2009年1月1日至2015年12月30日期间在中国人民解放军陆军总医院妇科接受手术治疗,经病理科医师采用同一诊断标准对手术切片再次复核后证... 目的探讨不同手术方法治疗梭型细胞分化的恶性潜能未定型子宫平滑肌肿瘤的术后复发情况。方法选取2009年1月1日至2015年12月30日期间在中国人民解放军陆军总医院妇科接受手术治疗,经病理科医师采用同一诊断标准对手术切片再次复核后证实患有梭型细胞分化的恶性潜能未定型子宫平滑肌肿瘤的患者。通过搜集临床资料及术后随访,比较不同手术方式和途径对术后复发率的影响。结果搜集到23位患者,随访时间2.5-69个月,2例(1例行经腹子宫肿物切除术治疗,1例行腹腔镜下矛宫肿物切除术治疗)于术后复发。将子宫肿物切除术组和全子宫切除术组以及经腹手术组和腔镜手术组进行Fisher确切概率检验,双侧检验P值均大于0.05。结论尚不能认为采用不同手术方法(全子宫切除术、子宫肿物切除术)及手术途径(经腹、腔镜手术)治疗该肿瘤在术后复发率方面有显著差异,但仍需通过扩大样本量进一步证实。 展开更多
关键词 恶性潜能未定型子宫平滑肌肿瘤 STUMP 子宫肿物切除术 全子宫切除术
残端显露器的设计及应用 预览
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作者 黄琴 李崇理 《世界最新医学信息文摘(电子版)》 2017年第52期214-215,共2页
目的介绍一种新型暴露残端根部的手术器械—残端显露器。方法详细介绍该器械的结构、工作原理及其临床应用效果。结果/结论经临床使用后效果证明,本器械在外科病人(特别是小儿),术中能很好的暴露残端根部,便于术者结扎残端根部且操作简... 目的介绍一种新型暴露残端根部的手术器械—残端显露器。方法详细介绍该器械的结构、工作原理及其临床应用效果。结果/结论经临床使用后效果证明,本器械在外科病人(特别是小儿),术中能很好的暴露残端根部,便于术者结扎残端根部且操作简便,值得临床推广。 展开更多
关键词 手术器械 拉勾 残端 设计及应用
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林区伐根生态经济价值及利用研究进展
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作者 王讷敏 李晨燕 +2 位作者 杨振 Taimoor Hassan Farooq 吴鹏飞 《世界林业研究》 CSCD 北大核心 2017年第5期34-38,共5页
伐根作为残留在森林伐区内的粗木质残体,是森林生态系统的重要组成部分,不仅能发挥重要的生态功能,且具有显著的经济效益,可有效保护生物多样性和维持生态平衡。文中分别从促进森林生态系统养分循环、改善微生物和动物生境等伐根生态价... 伐根作为残留在森林伐区内的粗木质残体,是森林生态系统的重要组成部分,不仅能发挥重要的生态功能,且具有显著的经济效益,可有效保护生物多样性和维持生态平衡。文中分别从促进森林生态系统养分循环、改善微生物和动物生境等伐根生态价值,提高立木木材利用率、促进森林更新等伐根经济价值,以及伐根主要利用方式3个方面进行论述,探讨研究中存在的主要问题并提出了研究展望,为今后的进一步研究提供参考。 展开更多
关键词 伐根 生态价值 经济价值 利用方式
留萌措施对米老排伐桩萌芽条生长与生物量的影响 预览
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作者 庞圣江 张培 +3 位作者 刘福妹 杨保国 刘士玲 赵总 《西北林学院学报》 CSCD 北大核心 2017年第6期40-44,共5页
以广西大青山林区米老排人工林主伐后的伐桩萌芽条为研究对象,分析不同萌芽条保留数量对米老排伐桩萌芽条生长与生物量积累的影响。结果表明,不同留萌处理措施,随着米老排伐桩萌芽条保留数量的增加,萌芽条的高度与胸径生长呈减小趋势,保... 以广西大青山林区米老排人工林主伐后的伐桩萌芽条为研究对象,分析不同萌芽条保留数量对米老排伐桩萌芽条生长与生物量积累的影响。结果表明,不同留萌处理措施,随着米老排伐桩萌芽条保留数量的增加,萌芽条的高度与胸径生长呈减小趋势,保留1株萌芽条更具有生长优势;萌芽条器官生物量大小均表现为主干〉枝条〉叶;萌芽条的总生物量呈现先增加后减小的趋势,保留2株萌芽条的总生物量积累最大,但保留1株萌芽条个体生物量积累明显高于其他处理的单株生物量。建议在米老排伐桩萌芽更新过程中,萌芽条生长1~2a再进行植株的密度调控处理,如培养薪炭林为主,每个伐桩保留1~2株生长健壮萌芽条;若需培育木材为目的,保留1株生长健壮萌芽条为宜。 展开更多
关键词 米老排 伐桩 萌芽 生长量 生物量 人工林
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48%盖灌能EC对柑橘黄龙病树伐桩处理试验 被引量:1
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作者 何益民 李蔚明 马春平 《植物检疫》 北大核心 2017年第1期73-74,共2页
在柑橘黄龙病重灾区,病树清理量大,病树伐桩处理困难,目前普遍推行的处理方法费工费时,处理措施难以到位,导致病树伐桩萌芽率高,成为新的传染源。本文利用48%盖灌能EC使用柴油为溶剂对柑橘黄龙病树伐桩进行处理。结果表明,5个处理试验... 在柑橘黄龙病重灾区,病树清理量大,病树伐桩处理困难,目前普遍推行的处理方法费工费时,处理措施难以到位,导致病树伐桩萌芽率高,成为新的传染源。本文利用48%盖灌能EC使用柴油为溶剂对柑橘黄龙病树伐桩进行处理。结果表明,5个处理试验对抑制病树伐桩萌芽均有很好的防效,270 d防效全南县果园达到98.7%,其他都达到100%;同时具有很好的催腐效果。该处理方法操作简单易行,省时省工,可以节省大量的人力和财力,是一种经济、安全、有效的柑橘黄龙病树伐桩处理方法。 展开更多
关键词 柑橘黄龙病 伐桩 萌芽 催腐 盖灌能 五步法
大青山林区米老排人工林伐桩萌芽更新研究 预览 被引量:2
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作者 庞圣江 张培 +3 位作者 刘福妹 赵总 杨保国 刘士玲 《西北林学院学报》 CSCD 北大核心 2016年第6期153-156,共4页
以33年生米老排伐桩为研究对象,分析了不同伐桩基径(≤30cm、3050cm)及伐桩高度(≤5cm、520cm)对其萌芽植株数量、胸径及高度等生长状况的影响。结果表明,4个不同的伐桩基径级之间,30〈X≤40cm其萌芽植株数量、胸径及高生长较大;... 以33年生米老排伐桩为研究对象,分析了不同伐桩基径(≤30cm、3050cm)及伐桩高度(≤5cm、520cm)对其萌芽植株数量、胸径及高度等生长状况的影响。结果表明,4个不同的伐桩基径级之间,30〈X≤40cm其萌芽植株数量、胸径及高生长较大;伐桩基径对其萌芽植株数量影响差异显著,但对胸径及高生长影响差异不显著。伐桩高度在≤5cm和5〈Y≤10cm时,其萌芽植株数量、胸径及高生长较大,且随着伐桩高度的增加而降低。 展开更多
关键词 米老排 伐桩 伐桩直径 伐桩高度 萌芽更新 人工林
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截干对杉木种子园老龄化母树光合特性的影响 被引量:4
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作者 黄开勇 陈琴 +3 位作者 戴俊 张建国 张峰 李魁鹏 《基因组学与应用生物学》 CAS CSCD 北大核心 2016年第6期1503-1511,共9页
为探究截干与否对杉木老龄化母树光合特性的影响,以杉木种子园老龄化截干与未截干母树为试验对象使用LI 6400XT便携式光合测定系统对其净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)和水分利用效率进行了比较研究。结果表明:与未... 为探究截干与否对杉木老龄化母树光合特性的影响,以杉木种子园老龄化截干与未截干母树为试验对象使用LI 6400XT便携式光合测定系统对其净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)和水分利用效率进行了比较研究。结果表明:与未截干母树相比,截干可极显著提高母树净光合速率、气孔导度、蒸腾速率以及水分利用效率,其中净光合速率提高了0.3~5.6倍,叶片气孔导度提高了0.4~2.7倍,蒸腾速率提高了0.2~2.1倍,水分利用效率提高了0.02~2.6倍。枝条朝向对光合特性有显著影响,总体表现为东面枝叶的净光合速率、叶片气孔导度和蒸腾速率大于南面和西面。 展开更多
关键词 杉木 截干 种子园 老龄化母树 光合特性
马尾松人工林伐桩储量与分解特征 被引量:1
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作者 汪沁 杨万勤 +3 位作者 吴福忠 张健 谭波 张玺涛 《植物生态学报》 CAS CSCD 北大核心 2016年第5期458-468,共11页
伐桩在人工林生态系统地力维持、碳吸存、生物多样性保育、水土保持等方面具有十分重要的意义,但对其储量及其分解特征的研究并不多见。因此,该文作者基于马尾松(Pinus massoniana)人工林采伐档案,2013年7月以1999–2013年间采伐残留... 伐桩在人工林生态系统地力维持、碳吸存、生物多样性保育、水土保持等方面具有十分重要的意义,但对其储量及其分解特征的研究并不多见。因此,该文作者基于马尾松(Pinus massoniana)人工林采伐档案,2013年7月以1999–2013年间采伐残留的伐桩为研究对象,调查了1–15年伐桩系统的木桩(SW)、树皮(B)、根桩(SR),以及不同径级根系(R1:0 mm〈径级≤10mm;R2:10 mm〈径级≤25 mm;R3:25 mm〈径级≤100 mm;R4:径级〉100 mm)的储量与分解特征。研究结果表明:马尾松人工林整个伐桩系统储量介于5–58 t·hm–2之间,根桩储量最大,木桩储量次之,树皮储量最小,根桩、木桩和树皮的储量均随着分解时间而降低。伐桩密度随分解时间而降低,但木桩、根桩和粗根径级均显著影响密度的变化。木桩、树皮和根桩的分解常数分别为0.061、0.027、0.036,R1、R2、R3、R4根系的分解常数分别为0.079、0.042、0.047、0.119。由此可见,马尾松人工林伐桩系统具有较高的储量,但分解较慢,且不同组分的降解速率具有显著差异。 展开更多
关键词 马尾松人工林 伐桩 分解序列 储量 分解特征
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