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对于大多数喜温类作物来说,冬季栽培最大的限制都在于温度。北京地区的日光温室一般后墙较薄(60厘米左右),在冬季低温阶段最低温往往只能保持在5℃左右。椒类作物在该温度条件下难以正常坐果膨大,因此难以正常越冬。所以,该茬口成功种植的关键主要考虑几个方面:一是增加后墙厚度、优化采光和保温条件,尽量给作物提供较好的生长环境;二是调整栽培茬口,适当提早播种,争取在低温季节到来之前保证坐住果实,使坐果期避开最低温阶段;三是尽量选取耐低温、长势旺、抗性强、果实性状好的品种。
For most thermophilic crops, the biggest limitation of winter cultivation is temperature. The greenhouse in Beijing generally thin rear wall (about 60 cm), the lowest temperature in winter is often only at low temperatures around 5 ℃. Pepper crops at this temperature is difficult to normal fruit set enlargement, it is difficult to normal winter. Therefore, the successful planting of the stubble mainly consider several aspects: First, increase the thickness of the back wall, optimizing lighting and heat preservation conditions, as far as possible to provide a better crop growth environment; Second, adjust the cultivation stubble, appropriate early sowing, for low temperature Seize the fruit before the arrival of the season so that the fruit-setting period to avoid the minimum temperature phase; Third, try to select the low temperature resistance, growing vigorously, strong resistance, good varieties of fruits.