高温对蔬菜的危害不可忽视。温度过高,养分消耗大于积累,水分蒸发量大,蔬菜延迟或停止生长,同时严重影响其品质。如高温下萝卜、肉质根变小,纤维增多;甘蓝结球松散,叶子粗硬;香菜在30℃以上时停止生长;辣椒、番茄易落花落果,出现畸形果、日灼病等;特别是叶菜类、根菜类等耐寒性蔬菜对高温反映更明显,易大面积发生病害。夏秋 High temperature on the dangers of vegetables can not be ignored. Temperature is too high, nutrient consumption is greater than the accumulation of water evaporation, vegetable delay or stop growing, while seriously affecting its quality. Such as radish at high temperature, fleshy roots become smaller, fiber increased; cabbage loose loose, rough leaves; cilantro stopped growing at more than 30 ℃; peppers, tomatoes easily fall drop fruit, deformities fruit, sunburn and so on; especially leaves Vegetables, root vegetables and other cold vegetables reflect the high temperature is more obvious, easy to disease in large areas. Summer