无芒雀麦与紫花苜蓿混播草地生长动态的研究

在无芒雀麦与紫花苜蓿混播草地中，地上生长与地下生长有很大的相关性和差异性，在一年内，二者生物量的动态均呈双峰曲线，峰期分别位于完熟期以及果后营养中后期。地上生物量增长最快在抽穗到成熟期，地下生物量增长最快在分蘖期到拔节期。

Studies on Growth Dynamics of Mixed Grassland of Bromegrass (Bromus inermis Leyss.) and Alfalfa (Medicago sativa L.)

Greater difference and correlation between the growth of above-ground biomass and that of under-ground biomass exist in alfalfa (Medicago sativa L.)and bromegrass (Bromus inermis Leyss.) mixed grassland. Mixed grassland has a similar biomass curve with two peaks in a year, one is in full-ripe period, another is in the middle and later period of vegetation after the full-ripe growth period. Growth rate reach peak from heading stage to ripe period for above-ground biomass, from tillering period to (jointing) stage for under-ground biomass.