作　　者： ; ;

机构地区： 兰州大学生命科学学院干旱农业生态国家重点实验室

出　　处： 《生态学报》 2000年第2期344-348,共5页

摘　　要： 通过 1 995年大田试验研究了黄土高原半干旱区春小麦受刈割伤害 (模拟动物采食 )后的补偿作用。结果表明 ,在大田实验条件下 ,刈割处理一般会使小麦生长受阻且减产 ,即不足补偿。在刈割一半叶片的处理中 ,拔节期的减产效应重于苗期的减产效应 ;在苗期处理中 ,重度伤害 (刈割全部叶片的减产效应大于轻度刈割 (刈割一半叶片 )的减产效应 ,而拔节期刈割前三位叶片的处理不仅未造成减产 ,还出现产量的超越补偿 ,是由于此时小麦早期生长的叶片已经开始变黄 (该年为 60多年未遇的特大旱年 ) ,刈割处理适时地去除了小麦的消耗器官 ,减少了生长冗余部分和改变了源 The field experiment of clipping stress(simulated herbivory) on the compensatory effects of spring wheat ( Triticum aestivum L.) was conducted in 1995 in semi arid region of Gansu Loess Plateau. The results showed that the yield of spring wheat was decreased by the clipping. The negative effects at the jointing stage was more serious than that at the seeding stage. A more heavy degree of the clipping resulted in the more serious effect at the seeding stage. However, the yield overcompensation for clipping the first three leaves at the jointing stage was expressed due to the change of source sink relations and resulted an increase of the yield. The reason was probably because of cutting away the tedious leaves in the drought.

关 键 词： 春小麦 生长冗余 源 库关系 刈割 补偿作用

领　　域： [农业科学]