设置塑料大棚,需要注意3个问题: 1.设置方位 在中纬度地区设置塑料大棚,特别是在北纬40°左右地区冬季使用,以东南向延长或东西向延长为宜。东南向延长者,直观上不佳,但是,这种跨向清晨早受光,使温度及早回升,最低温度不致下降太低。而中午太阳辐射最强时,光线稍有斜射,最高温度又不致升得太高,使大棚内温度变化缓和,形成对蔬菜有利的温度条件。目前来看,东西向设置较多。无论是 Set plastic shed, you need to pay attention to three issues: 1. Set the location of plastic sheds in the mid-latitude region, especially in winter at about 40 ° north latitude, to extend the southeast or east-west extension is appropriate. Southeast extension to visually impaired, however, this cross morning early light, the temperature rise early, the minimum temperature will not drop too low. The strongest noon solar radiation, the light a little oblique, the maximum temperature will not rise too high, so that changes in the greenhouse temperature mitigation, the formation of vegetables favorable temperature conditions. For now, there are more things to set up. Whether it is