近几年来果园普遍推广覆草,确实收到改良土壤、保肥保水、防止杂草等良好效果。但发现,有些果园,特别是果园周围杂草多、坟墓多的园片,覆草后果树常遭到老鼠的危害,幼龄果树根颈被啃伤,结果大树主根皮被啃,严重削弱树势或造成死亡。如 In recent years, orchards generally promote grass cover, did receive improved soil, fertilizer and water, to prevent weeds and other good results. However, it was found that in some orchards, especially the orchards around weeds and more graves, the tree is often endangered by the mice, and young tree roots are bitten by the neck. As a result, the main tree bark is severely weakened Tree potential or cause death. Such as