论文部分内容阅读
在我国北纬40—50°的高寒地带,冬季极端最低温往往降至-35—-40℃,苹果、梨、桃等落叶果树,全要埋土越冬。只有山荆子、海棠果、山葡萄、山桃、辽杏等野生及半栽培果树,能够自然越冬。新疆自五十年代起,即参考苏联在西伯利亚等寒冷地区的生产经验,用匍匐法栽培优良品种,开始是倾斜栽植、人工扣压;尔后用人工匍匐育苗,直立栽培,总之要使树冠保持在地上10—60厘米的低空、以便保护越冬。但却全是强制性自动匍匐形、骑生枝多、树形紊乱,整形修剪繁琐又要人工埋土出土,
In the alpine region at 40-50 ° north latitude in our country, the extremely low temperature in winter tends to drop to -35--40 ° C. Deciduous fruit trees such as apples, pears and peaches are all overwinter. Only the wild prickly ash, crabapple fruit, mountain grapes, mountain peach, Liao Xing and other wild and semi-cultivated fruit trees, can naturally wintering. Xinjiang since the 1950s, that is, with reference to the Soviet Union in Siberia and other cold regions of production experience, with creeping cultivation of fine varieties, began tilted planting, artificial buckling; later artificial creeping nursery, upright cultivation, in short, to keep the crown on the ground 10-60 cm low, in order to protect wintering. But it is all mandatory automatic creeping, riding a branch, tree disorder, trimming trimming complicated but also buried by artificial excavated,