紫花苜蓿草地地上生物量动态规律的研究

Study on the Dynamics of Aboveground Biomass of Alfalfa Meadow.

运用定位观察法测定了不同生育年龄紫花苜蓿草地地上生物量，经统计分析建立了紫花苜蓿草地地上生物量季节动态模型和年度动态模型，确定了不同生育年龄紫花苜蓿草地的最佳打草期和有效利用年限。

Aboveground biomass was measured for alfalfa crops of diffenent ages. seasonal and Yearly aboveground biomass dynamics were formulated. Optimum harvesting time and effectine utilization period were determined for alfalfa crops in southern Ningxia region.