土壤因素对羊草群落构成与种群生物量的影响

The Effecis of Soil Factors on Ecological Distribution and the Above-ground Biomass of Leymus chinensis Communilies

对不同程度盐碱生境下羊草（Ｌｅｙｍｕｓｃｈｉｎｅｎｓｉｓ）群落的生态分布及地上生物量作了研究，得出：影响羊草群落生态分布和生物量的主导因素是土壤含盐量和酸碱度（ｐＨ值）．其中土壤含盐量是影响生物量的主要因素，并且以７月份最为显著．

The study is on ecologica distribution and above-ground biomass of Leymu chinensis community in various salt-alkali habit.The conclusion is that the principal factor affecting ecological distribution and above-ground biomass is the salt content of soil and salt-alkali degree (pH). Salt content of soil is the important factor affecting biomass and the effect July is the most dominant. Subsurface biomass seasonal variation has differance in various salt-alkali habit. This is also the manifestation that salt-alkali affect leymus chinensis commnity biomass.