多年生黑麦草和白三叶人工草地生物量动态研究

A Study on Biomass in Perennial Ryegrass/White Clover Mixed Pasture

本文研究了多年生黑麦草和白三叶人工草地地上生物量、地下生物量以及全植层生物量的形成规律。结果表明，地上生物量的形成曲线为双峰型，而地下生物量的曲线为三峰型，且后者峰值的出现时间较前者早近一个月；地上部和地下部生物量受两种牧草生长节律的制约。

The regulation of aboveground biomass, underground biomass and total biomass of perennial ryegrass/white clover mixed pasture were studied in this paper. The results showed that the growth model of the aboveground biomass was a double-peak curve,while the underground was a three-peak curve. The three peaks were in the last of May, August and November. A mounth ahead of peaks time of under-eground biomass were found than of peaks time of aboue-ground biomass. The mixed pasture biomass was affected by the seasonal changs of perennial ryegrass and white clover.