果树栽培,直接受到各种自然因素的影响,其中气象条件影响更为突出。位于河西走廊中部的张掖地区,年均气温偏低,属北方寒地果树栽培区。由于温度的限制,果树生长期短,幼树枝条多不能充分成熟,加之均以基础低接成苗建园和粗放管理,表现树枝抗道性差,致使梨幼树越冬伤亡大。进入初果期,日灼病、腐烂病、干基湿腐病渐趋严重,甚至达到毁园地步。造成一些单位和乡村栽树不见树,建园不见园;投资大、周期长、产量低而不稳,经济效益差;挫伤了一些农户的积极性,影响了果树的发展。其 Fruit tree cultivation, directly affected by various natural factors, of which the impact of meteorological conditions more prominent. Located in the central Hexi Corridor Zhangye area, the average annual temperature is low, is a northern cold winter fruit cultivation area. Due to the temperature limitation, the growth period of fruit trees is short and the young shoots can not fully mature. In addition, all the trees are undergrowth with low basic planting and extensive management. Into the early fruiting period, sunburn, rot disease, dry-based wet rot is becoming more serious, and even reached the threshold of destruction. As a result, some units and rural areas planted trees and saw no trees. No investment was found in the park. Large investment, long cycle, low output and instability resulted in poor economic returns. This dampened the enthusiasm of some farmers and affected the development of fruit trees. its