刈割对人工草地产量和补偿性生长的影响

Effect of Cutting on Yield and Compensatory Growth of Artificial Pasture

研究了刈割频次和留茬高度对苜蓿、老芒麦和草地雀麦单播草地的产量和补偿性生长的影响。结果表明,多次刈割和齐地(或低留茬)刈割有利于苜蓿的超补偿生长,但随着刈割频次的增加苜蓿的产量和再生能力降低(P<0.01)。老芒麦的再生能力随着刈割频次的增加和留茬高度的降低而降低(P<0.01),但其总产量不受影响,在各刈割频次和留茬高度处理下均呈等补偿生长。随着刈割频次的增加,草地雀麦的产量和再生能力无明显变化,在各刈割频次下均呈等补偿生长,但齐地刈割会使其产生欠补偿生长。

Cutting is a main way to use artificial pasture,it inhibit or promote the growth of forages.The effects of mowing time and stubble height on compensatory growths and yield of Medicago sativa,Elymus sibiricus and Bromus riparius grew on single pasture were studied.The results showed that repeatedly mowing and homogeneous ground（or low stubble）mowing was favor of the over-compensation growth of alfalfa.But yield and re-growing of alfalfa was reduced with the increases of mowing times（P〈0.01）.Re-growing of E.sibiricus was decreased with increasing of mowing times and decreasing of stubble heights（P〈0.01）.But it＇s yield wasn＇t affected,equal-compensation appeared at different mowing times and stubble heights.There were no significant changes in the yield and re-growth of meadow brome with the increase of the cutting times.Equal-compensation appeared at the different mowing times.But stubble0 cm mowing made meadow brome under-compensation.