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一、高温和低温危害。当棚内温度达到35℃以上时,番茄植株营养状况不良,落花落果增多,果实被阳光直射部位有日的发白现象。高温干燥时叶子向上卷缩,果皮组织变硬。温度连续在10℃以下,易产生畦形果,5℃以下花粉死亡,大量落花,并形成畸形果。因此,要做好放风和防寒工作,保持生育适温。
First, the high temperature and low temperature hazards. When the shed temperature reached above 35 ℃, poor nutritional status of tomato plants, falling rapeseed fruit increased, the fruit was sun-exposed parts of the day whitening phenomenon. The leaves curl upwards and the pericarp hardens when dried at high temperatures. Continuous temperature below 10 ℃, easy to produce 畦 fruit, pollen death below 5 ℃, a large number of flowers, and the formation of deformed fruit. Therefore, to do a good job of wind and cold work, to maintain a suitable temperature for childbirth.