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缺氮症 西瓜缺氮时,植株生长缓慢,叶细弱,下部叶片绿色褪淡,茎蔓新梢节间缩短,幼瓜生长缓慢,果实小,产量低。补救措施:一是亩用尿素10—15公斤(一般苗期缺氮,每株20克左右;伸蔓期缺氮,每亩9—15公斤;结瓜期缺氮,每亩15公斤左右)或亩用人粪尿400—500公斤兑水浇施;二是用0.3—0.5％尿素溶液(苗期取下限,坐果前后取上限)叶面喷施。
Nitrogen deficiency Watermelon N, the plants grow slowly, thin leaves, the lower green leaves faded, stems and internodes shortened, slow growth of cucumber, fruit is small, low yield. Remedial measures: First, 10-15 kilograms of urea per acre (general seedling lack of nitrogen, about 20 grams per plant; extension period of nitrogen deficiency, 9-15 kilograms per acre; fruiting period of nitrogen deficiency, about 15 kilograms per mu) Or mu with human excrement 400-500 kg against water pouring facilities; the second is to use 0.3-0.5% urea solution (seedling take down the limit, before and after taking the upper limit) foliar spray.