达乌里胡枝子群落生物量初步研究

A Preliminary Studies on the Biomass of Lespedeza Davurica Community.

本文研究了陕北黄土高原森林草原地带达乌里胡枝子群落６、７月份生物量，测定了地上和地下生物量及其空间变化。结果表明，达乌里胡枝子群落６、７月份地上生物量分别为９６．６８ｇ／ｍ￣２和１３６．２ｇ／ｍ￣２，地下生物量为２２６．５ｇ／ｍ￣２和２１０．７２ｇ／ｍ￣２．地下生物量７月份偏低，这与达乌里胡枝子生长发育阶段的物质分配有关。

Not only the distribution range of the Lespedeza davurica community on forest steppe of the loess plateau in north Shanxi Province is widespread,its quality is also excellent.It occupies a very important position in animal husbandry.We investigated spacial varia- tion of both aboveground part and underground biomass in June and July in Spodio- pogon sibiricus community. The result indicates that :the aboveground biomass in June and July are 96.88g/m￣2 and 136.2g/m￣2 respectively,underground biomass are 226. 5g/m￣2 and 210.72g/m￣2,respectively,Underground biomass is minimum in Tuly. Such change in biomass is reievent tu the organic matter distribution at the growth and devel- opment stages of Lespedeza davurica.