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1.控施氮肥 幼苗期适当减少氮肥施用量,切忌偏施、重施氮肥,以免植株生长幼嫩,抗寒能力减弱。追肥要早,以促进菜苗生长健壮。低温前不施速效氮肥,宜叶面喷施浓度为0.2％～0.3％磷酸二氢钾液一二次。 2.多施有机肥 抓住晴暖天气,用猪牛栏粪或堆沤腐熟的干细堆肥等暖性农家有机肥,施于菜蔸根部,可提高土温2℃～3℃。 3.培土 冰冻前结合中耕,把锄碎的泥土培于蔬菜根
1. Control nitrogen fertilizer seedling appropriate to reduce the amount of nitrogen application, avoid partial Shi, re-applied nitrogen, so as to avoid the growth of young plants, weakened ability to resist cold. Top dressing should be early to promote the robust growth of vegetable seedlings. Pre-low-temperature nitrogen fertilizer is not applied, the foliar spraying concentration of 0.2% to 0.3% of potassium dihydrogen phosphate one or two times. 2. Multi-application of organic fertilizer to seize the warm weather, with pig manure barn or heap composting dry heap compost and other warm farm organic fertilizer, applied to the roots of vegetables, can increase soil temperature 2 ℃ ~ 3 ℃. 3. Peat soil before freezing combine cultivation, the hoe crushed soil cultivated in vegetable roots