刈割时间、刈割强度与施肥处理对燕麦补偿的影响

Impacts of clipping time,clipping intensity and fertilization on plant compensation of Avena sativa

刈割强度、刈割时间和施肥状况对燕麦的补偿有明显影响作用.在不施肥条件下,分蘖期轻度刈割有利于植物的补偿作用,拔节期重度刈割以及重复刈割影响植物生长.施肥可以提高受适度刈割损害植物的补偿程度.无论施肥与否,燕麦都没有发生明显的超补偿现象.但在施肥条件下,留茬高度8cm的刈割处理使燕麦在一定程度上提高了植物的生产力,尤其是秆叶的干重.

Based on the experiment of clipping and fertilization for Avena sativa in Hezuo,Gansu Province,the impacts of clipping time,clipping intensity and fertilization treatments on plant compensatory responses were compared.The results show that these treatments influence significantly plant compensatory responses to simulated grazing.Firstly,plant compensatory abilities were higher after clipping at the level of 4 cm height kept at tillering stage than after other clipping treatments.Secondly,compensatory abilities of individuals damaged moderately increased as a consequence of fertilization,and exact compensatory responses were found when clipping at the level of 8 cm height kept under the condition of fertilization.It may be suggested that moderate clipping under the condition of fertilization could increase plant production,especially dried mass of stem and leaves.