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紫花苜蓿生长特性及产量性状相关性研究 预览 被引量:61

Growth characteristics and their correlation with the yield of Medicago sativa
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摘要 连续4年对我国10个已通过审定的苜蓿品种的生长发育特性及产量性状的相关性进行了研究.结果表明,苜蓿生长的高峰期在第3年,单株干物质产量最大生长速度在第1茬,日均增长速度最快为第2茬;各龄1茬的单株干物质产量占当年的41.69%~61.90%,2茬占19.76%~33.59%,3茬占12.03%~18.33%.各性状分析表明,其变异系数依次为4年平均叶面积(17.43%)>4年单株总干物质产量(12.42%)>4年日均增高(8.63%);年际间变异系数以年单株干物质产量及叶面积1、4龄最高,日均增高则以2龄最高;茬次间变异系数除1龄外单株干物质产量及日均增高均以2、3茬变幅较大或最大,其中单株干物质产量及日增高最高值分别为4龄2茬和3龄2茬.2、3、4龄的年单株干物质产量、年日均增高及叶面积均与4年总产量呈极显著相关,且以3、4龄年干物质产量对总产量影响最大. Growth characteristics and their correlation with yield for 10 varieties of Medicago sativa were evaluated from 1999 to 2002 under space sowing at Lanzhou, China. The peak period of growth for Medicago sativa occurred in the third year. The greatest increase in dry matter yield occurred before the first cutting, and the fastest daily average increase in height occurred before the second cutting. The coefficients of variance for yield properties among varieties from highest to lowest were leaf area> total dry matter 〉annual average increase height/day. Among years, the highest coefficient of variance for total dry matter and leaf area occurred in the 1~(st) and 4~(th) years, and in the 2~(nd) year for daily increase in height. Between cuttings, the highest coefficient of variance for dry matter yield and increase height/day occurred in the second cutting of the 4~(th) year and in the second cutting of the 3~(rd) year, respectively. The correlation analysis showed that the total dry matter for the 10 varieties very significantly positively correlated to yield components in the 2~(nd), 3rd and 4~(th) years, among which annual dry matter yield in the 3rd and 4~(th) years had the greatest influence on total dry matter yield.
作者 孙建华 王彦荣 余玲 SUN Jian-hua, WANG Yan-rong, YU Ling(College of Pastoral Agriculture Science and Technology, Lanzhou University, Gansu Grassland Ecological Research Institute, Lanzhou 730020, China)
出处 《草业学报》 CSCD 2004年第4期 80-86,共7页 Acta Prataculturae Sinica
基金 国家重点基础研究发展计划(973计划),中国-澳大利亚合作项目
关键词 紫花苜蓿 干物质产量 产量性状 相关性 Medicago sativa dry matter yield yield properties correlation
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