论文部分内容阅读
棚室蔬菜所需的光和热来自太阳辐射,夜间温度的维持也全靠白天蓄积的热量。所以,当遇到不良的气候条件致使棚室温度不适,而保温措施或通风降湿又不适当时,蔬菜叶片很容易受害,呈现各种症状。如诊断错误,尤其是错诊为侵染性病害,就会导致不合理用药,给菜农造成一定的损失。因此,
Greenhouse vegetable light and heat from the sun’s radiation, night temperature maintenance also depends on the accumulation of heat during the day. Therefore, when encountering bad weather conditions resulting in greenhouse temperature discomfort, and insulation measures or ventilation and humidity is not appropriate, the leaves of vegetables are very vulnerable, showing a variety of symptoms. Such as diagnostic errors, especially misdiagnosed as infectious diseases, it will lead to irrational use of medicines, vegetable farmers caused some losses. therefore,