论文部分内容阅读
在我国北纬40℃N以北的寒温带地区,冬季最冷月的绝对最低气温,普遍在-18℃以下,甚至-30——40℃,远远超过了欧洲种葡萄(Vitis Viniferz)的耐寒极限,所以生产中普遍要人工埋土保护越冬。随着生产发展,面积扩大,日益要求机械化埋土,至今已研制出埋土机,但却不能机械化出土。为了解除手工埋土、出土的沉重负担,为葡
In the cold temperate zone north of north latitude 40 ° C N, the absolute minimum temperature of the coldest month in winter is generally below -18 ° C, or even -30-40 ° C, far exceeding that of the Vitis Viniferz Limit, so the production of artificial buried to protect the winter. With the development of production and the expansion of area, mechanized burial is increasingly required. To date, burying machines have been developed but can not be mechanized. In order to relieve manual burial, unearthed a heavy burden for Portugal