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水稻生育后期生殖生长处于主导地位,叶片、茎秆、叶鞘等贮藏的养分均向穗部输送,是决定粒数和粒重的关键时期,仍要加强田间管理。 1、合理施用粒肥。旋用粒肥能增加籽粒饱满度,提高千粒重。施用量一般占水稻生育期总量的5％,约亩用碳铵4—5公斤,在齐穗后(唐山各县8月25左右)撒施,也可在8月底9月初进行叶面喷肥,每亩用尿素250克,加硫酸钾250克喷雾,或每亩用磷酸二氢钾200克,兑水25公斤喷雾,注意肥
Reproductive growth is dominant in the late rice growth stage. Nutrients stored in the leaves, stems, leaf sheaths and so on are all transported to the panicle, which is a key period to determine the grain number and grain weight. Field management should still be strengthened. 1, a reasonable application of grain fertilizer. Rotary granulation can increase the grain fullness, increase 1000 grain weight. Generally the amount of rice growth accounts for 5% of the total, about mu with ammonium bicarbonate 4-5 kg, after heading (Tangshan counties around August 25) spreading, but also in late August and early September foliar spray Fertilizer, 250 grams per mu with urea, plus 250 grams of potassium sulfate spray, or with 200 grams of potassium dihydrogen phosphate per mu, watered 25 kg spray, pay attention to fertilizer