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夏季菜受热害的表现为:第一,影响花芽分化,黄瓜雌花分化晚而少,甜椒花粉发育不良而脱落;第二,日烧,如烈日灼伤番茄叶缘、果实、黄瓜叶缘等;第三,果实着色不良。防御热害要做到:一、选用耐热蔬菜种类和品种:黄瓜选用津研2号、7号;番茄用历红2号、强力米寿;茄门甜椒,之豇28—2,青皮冬瓜,夏光甘蓝等。也可种耐热的苋菜、蕹菜等。二、冷凉灌溉:傍晚或清晨,小水(井水)勤浇或浇过膛水,并注意涝浇园。
First, the impact of flower bud differentiation, late flower bud differentiation of cucumber less, sweet pepper pollen dysplasia and fall off; second, burning, such as sun burns tomato leaf margin, fruit, cucumber leaf margin and so on; Third, poorly colored fruit. Defensive heat damage to be done: First, the selection of heat-resistant vegetable types and varieties: cucumber selection Jin research on the 2nd, No. 7; tomato with calendar red 2, strong Mishou; eggplant bell pepper, the cowpea 28-2, , Summer light cabbage and so on. Can also be kind of heat amaranth, Ipomoea and so on. Second, cold irrigation: early evening or early morning, small water (well water) ground pouring or poured over the water, and pay attention to waterlogged garden.