高寒地区塑料大棚蔬菜栽培中应注意的问题青海省门源县地处高寒，无绝对无霜期，作物种植区年平均气温０℃，海拔２７３０～２９３０ｍ，多数蔬菜不能进行露地生产，吃菜长期靠外地运进。近几年，引进推广了塑料大棚和节能日光温室蔬菜生产技术，有效地提前和延长了蔬菜的... In the alpine region should pay attention to the plastic greenhouse vegetable cultivation problems Qingyuan Province, located in the source of alpine, no absolute frost-free period, the cropping area of ​​the annual average temperature 0 ℃, 2730 ~ 2930m above sea level, most vegetables can not be open-field production, Move into. In recent years, the introduction of the promotion of plastic greenhouses and energy-saving solar greenhouse vegetable production technology, effectively advance and extend the vegetable ...