摘要
对山西白羊草灌丛草地牧草产量动态三年的定位研究结果表明，白羊草灌丛草地牧草产量的季节动态规律较稳定，各年度动态曲线均呈单峰型，高峰值出现在８月份，峰期后牧草产量下降较缓慢；牧草营养物质的变化，生长前期粗蛋白质含量较高，随生育期进展而逐渐减少，粗纤维含量则相反；粗蛋白质产量高峰期在８月，这与干草产量的高峰期正好吻合，此时正是该类草地利用的最佳时期。
he dynamics of herbage yield in Bothicohloa ischaemum shrub grassland of Shanxi was studied for three years. The results show that trends of herbage yield was of unimodal curves in every year, the high─yield season of hay was in August,then it began to de-creas slowly. The nutrient content of crude protein(CP) was high in the early stage of herbage growth and decrease with time. Crude fibre was just opposite to CP.The high─yield season of CP was in August.
出处
《中国草地》
CSCD
1995年第4期13-16,21,共5页
Grassland of China
关键词
牧草
产量
营养成分
白羊草
灌丛草地
山西
herbage yield,dynamics, nutrient content ,Bothiochloa ischaemum shrub grassland
