刈割次数对肇东苜蓿连续两年生产影响的灰色关联分析

Grey correlation analysis for effects of cutting times on Zhaodong-alfalfa production in two years

连续两年在哈尔滨地区,对肇东苜蓿进行了每年刈割1、2、3次的田间试验,比较了各处理在干草产量、粗蛋白产量及越冬率方面的差异,并通过灰色关联分析对各个处理进行了综合评价。结果表明,种植第2、3年的肇东苜蓿的最优刈割次数是2005年(种植第2年)刈割2次,2006年(种植第3年)刈割2次。

Through two-year＇s continuous cutting on Zhaodong-alfalfa（Medicago sativa L. cv. ＇Zhaodong＇）at different cutting times in Harbin, The differences in yields of hay and crude protein, and overwintering rates between treatments of Zhaodong-alfalfa were measured and compared in two years. By using the method of grey correlation analysis,all the treatments of Zhaodong-alfalfa with different cutting times were evaluated comprehensively. The results indicate that the best cutting times for Zhaodong-alfalfa in Harbin were 2 times cutting in 2005 （i. e. the second year after sowing） and 2 times cutting in 2006（i. e. the third year after sowing ）when were the best yields of herbage production.