Seasonal Variation of Aboveground Biomass of Main Plant Communities and Its Relationship with Soil Moisture in the Hill-gully Loess Plateau
In order to explore the seasonal variation of aboveground biomass of main communities and its relationship with soil moisture in the hill-gully Loess Plateau,17 sample plots set in 8 representative main plant communities were investigated monthly,and correlation analysis was used to examine the seasonal variation of plant aboveground biomass and soil moisture,and their relationship.The results showed that:(1) aboveground biomass of different plant communities had obvious seasonal variation characteristics with single-peak type,and the maximum appeared in July or August,the minimum appeared in May;(2) soil moisture distribution along the vertical direction of soil profile exhibited three obvious layers,which were active layer of 0-100 cm,relatively active layer of 100-300 cm and relatively stable layer of 300-500 cm.All these three layers had regular seasonal change characteristics.But the variation in the soil layer of 0-100 cm was significant,the maximum occurred in August,and the minimum was observed in May or June;(3) seasonal variation of aboveground biomass was closely associated with level of soil moisture.In soil layer of 0-100 cm,the effect of soil moisture on the seasonal change in aboveground biomass was more significant.With the increase of soil depth,its effect gradually declined;(4) the different plant community consumption capacity of the soil moisture was various.In the vegetation restoration and reconstruction,we should choose appropriate species according to local conditions in order to speed up the whole hill-gully loess vegetation restoration process.
the hilly-gully Loess Plateauaboveground biomasssoil moisturerainfallseasonal variation
国家科技期刊平台
NSTL
万方数据
维普
