在调整种植结构,增加农民收入和满足城乡人民生活需求的前提下,蔬菜种植面积不断扩大,种类逐渐增多。在夏秋蔬菜生长旺盛季节,高温的危害,常使蔬菜呼吸消耗大于光合合成,降低代谢机能而引起早衰,如叶菜类的甘蓝,叶片粗硬,结球松散;根菜类的萝卜,直根变 Under the premise of adjusting planting structure, increasing peasants’ income and meeting the needs of urban and rural people’s daily life, the planting area of ​​vegetables has been continuously expanded and its species gradually increased. Vegetables in the summer and autumn growing season, the dangers of high temperatures, vegetables often cause respiratory exhaustion than photosynthesis, reduce the metabolic function caused by premature aging, such as leafy cabbage, leaves hard and loose, knot loose; root vegetables radish,