Study on Biomass Production and Soil Water Use of Bothriochloa isaemum and Lespedeza davurica Mixture Grassland in Loess Hilly-gully Region
The purpose of the study is to rationally use and seek ideal mixture ratio of native species in loess hilly-gully region so as to establish artificial grassland.One field experiment was conducted by using a replacement series design in which Bothriochloa ischaemum and Lespedeza davurica were sowed as row ratios of 0 ∶ 10,2 ∶ 8,4 ∶ 6,5 ∶ 5,6 ∶ 4,8 ∶ 2 and 10 ∶ 0 in the same plot.The plant height,aboveground biomass production,water use efficiency of grassland under each mixture ratio were investigated and compared.The results indicated that plant heights of the two species in mixtures were significantly higher than those in their respective monoculture.The aboveground biomass production and water use efficiency of the two-species mixture grassland were higher than their respective monoculture.The aboveground biomass production and water use efficiency were significantly higher at B.ischaemum ∶ L.davurica ratio 6:4,and the minimum was in L.davurica in monoculture (i.e.0 ∶ 10 ratio).All these suggest that the existed complementary effect between B.ischaemum and L.davurica in mixture grassland,and the B.ischaemum ∶ L.davurica ratio of 6 ∶ 4 had comparative advantage in aboveground biomass production and water use efficiency.
Bothriochloa ischaemumLespedeza davuricaMixture ratioAboveground biomass productionWater use efficiency
NETL
NSTL
万方数据
维普
