果园重茬病又名再植病。所谓重茬病是指同一块地,种植果树后又继续种植同种类果树,导致再植果树生长受到抑制或病虫害重发的现象。重茬病的表现主要反映在移栽幼树生长衰弱,根系发育不良、腐烂,新梢生长缓慢,节间变短,叶片失绿,抽条困难,挂果少,果品质量差且再植树成为小老树,重则未到成龄就渐枯死。1.造成果园重茬病的原因一是老果树根系分泌物含有有毒物质,直接抑制了新栽果树根系的呼吸作用,最终造成新栽果 Orchard stubble disease, also known as replant disease. The so-called stubble disease refers to the same piece of land, planting fruit trees and then continue to grow the same kinds of fruit trees, resulting in replanted fruit trees were inhibited or pests and diseases repeated the phenomenon. Stubble disease mainly reflected in the growth of transplanted saplings weak, poorly developed roots, decay, shoot growth is slow, internodes shorter, green leaves, pumping difficulties, fruit less, poor quality of fruit and replantation trees become young Trees, heavy but not yet mature to die. 1. Cause orchard stubble disease reasons First, the old tree root exudates contain toxic substances directly inhibit the respiration of the newly planted tree roots, eventually resulting in new planting