Effects of Long-term Mowing on the Density and Biomass of Achnatherum sibiricum
Mowing is one of the primary management in typical steppe,and the study of interannual changes in density and biomass of dominant species under long-term mowing can provide a theoretical basis for clarifying the development and utilization of superior forage in typical steppe.A long-term(1982～2022)mowing experiment in a typical steppe was conducted with successive mowing(leaving a stubble height of 6 cm)and control(no mowing)to investigate interannual variations of plant density and biomass of the dominant species Achnatherum sibiricum.The results showed that long-term successive mowing sig-nificantly decreased the density and biomass of A.sibiricum with wider interannual fluctuations.A.sibiri-cum biomass began to decrease in the 20th year(P＜0.05)and the decrease was highly significant in the 30th year(P＜0.01).Overall,A.sibiricum initially exhibited greater resistance at the start of mowing.Plant density and biomass,however,showed a fluctuating declining trend,and gradually turned to low mowing tolerant species due to the cumulative effects of mowing.The growth response of A.sibiricum to mowing provides crucial evidence for the sustainable utilization of typical steppes.
万方数据
维普
