刈割频次与留茬高度对人工草地生产力的影响

Influence of Mowing Frequency and Stubble Height to Productivity in Artificial Lawn

通过对刈割频次与留茬高度对人工草地生产力的影响的研究,结果表明:刈割频次对牧草的生产力影响不显著,西伯利亚蓼却变换明显;随着留茬高度的递增,各类牧草的日生产力逐步提高;日生产力比例(除垂穗披碱草)呈现缓慢上升趋势。对牧草生产力衰退率进行统计分析后得知,处理A属于重度退化;处理B属于中度退化,处理C属于轻度退化,处理D可认为处在相对稳定的状态,基本上属于不退化。

The influence of mowing frequency and stubble height on productivity Of artificial lawn was investigated. The resuIts showed that： The influence of mowing frequency is not remarkable to the forage productive forces, the productivity ofpolygonum sihiricum but with the increased frequencvi of mowing lowet;Along with keeps stubble high increasing progressively, each kind of forage date productive forces enhances gradually; The date productive forces proportion（Elymus nutans ） present the slowly rised trend, Carries on the statistical analysis to the forage productive forces rate of decay to know that,treatment A is belong to the specific degeneration ;treatment B isbelong to the moderate degeneration, treatment C is belong to the mild degeneration, treatment D is possible to think occupies the relatively stable condition, basically belongs does not degenerate.