放牧对松嫩平原羊草草地影响的研究

THE INFLUENCE OF GRAZING ON THE ANEUROLEPIDIUM CHINENSE GRASSLAND IN SONG—NEN PLAIN

放牧主要影响羊草草地群落结构及其土壤生境两方面的变化。群落结构的变化表现在优势种羊草的数量特征、群落组成、生物量、牧草的化学营养成分等随放牧强度的变化而改变;土壤生境表现在土壤有机质含量、土壤pH、土壤含水量等方面的变化。通过这两方面的探讨,表明群落的变化与土壤生境的变化相辅相成,由放牧引起的演替过程是群落和土壤生境即连续又间断的变化过程。

ABSTRACT The major influence of grazing on Aneurdepidium chinense Grassland is changes of the plant community and soil habitat. The changes of the plant community caused by grazing have been found on population, vege-tation, biomass and nutrient content of the Aneurolepidium chinense that is superiority species. The changes ofthe soil habitat have been found on contdnt of organic matter, pH and moisture. The results also showed that the changes of the plant community were relative to the soil habitat.