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近几年来,江苏沿海及苏北里下河稻区随着中籼杂交稻的推广种植,水稻茬口冬闲空白田面积逐年增加,据笔者所知,盐城市郊区常年就有4万多亩,占稻田总面积的30％以上。如将此加以利用,全部种上绿肥,每亩产鲜草如按2000公斤计算,就相当于每亩增施硫酸铵50公斤、过磷酸钙12公斤、硫酸钾14公斤。但由于水稻收割后再播绿肥,错过了最佳播种期,冬前生
In recent years, with the promotion and cultivation of mid-season hybrid rice in the coastal areas of Jiangsu Province and Lixiahe River in northern Jiangsu Province, the area of winter and open blank fields of rice stubbles increased year by year. According to my knowledge, there are 40,000 mu of perennials in the suburbs of Yancheng, accounting for Rice fields more than 30% of the total area. If this is to be used, all kinds of green manure, per acre of fresh grass, if calculated according to 2000 kg, equivalent to 50 acres per acre ammonium sulfate, superphosphate 12 kg, potassium sulfate 14 kg. However, due to the sowing of rice after sowing green manure, missed the best sowing time, pre-winter students