不同刈割留茬高度对苜蓿产量及品质的影响

Different Alfalfa StubbleHeight Influenceonthe Yieldand Quality

近年来,山西地区苜蓿生产基地和畜牧业的迅速发展,对苜蓿的产量和品质的要求和需求越来越大,为解决我国山西地区苜蓿生产中存在的问题。本文以"金皇后"紫花苜蓿(Medicago sativa L.Cv.Golden Empress)为试验材料,以国家牧草产业技术体系太原综合实验站为试验地点,通过随机区组实验对不同留茬高度的苜蓿进行产量和营养品质的分析测定,确定当地适宜的留茬高度。结果表明:(1)苜蓿刈割不同留茬高度下,得出留茬高度为5~8cm时,其RFV和苜蓿草产量的值均较高,其经济价值最大;(2)苜蓿刈割不同留茬高度对产量和蛋白质的含量有影响,随着留茬高度的下降,蛋白质含量随之下降,其产量却增加;(3)苜蓿刈割不同留茬高度对苜蓿的茎叶比有影响,随着苜蓿留茬高度的降低,其茎叶比逐步增大。

In recent years, the rapid development of alfalfa production based in the Shanxi area and animal hus- bandry, on Alfalfa Yield and quality requirements and the growing demand for alfalfa production in Shanxi area to solve the existing problems of our country. The Queen alfalfa （MedicagosativaL. Cv. GoldenEmpress） as test ma- terials, by the national grass industry technology system in Taiyuan the experimental station for the test site, through randomized block experiment on different stubble height of Alfalfa Yield and nutritional quality analysis, to determine the local optimum stubble height. The results showed that： （1） Alfalfa cutting different stubble height, the stubble height is 5~8cm, the RFV and the yield of alfalfa was higher, the economic value of the largest. （2） Alfalfa cutting stubble height have different effects on the content of protein and yield, with the decline of stubble height, protein content decreased, the yield was increased. （3） Alfalfa cutting different stubble height of alfalfa stem leaf ratio had influence with decrease of Alfalfa stubble height, stem leaf ratio increases gradually.