1984年,我县引用广东的水稻氮素调控技术,在多点试验中取得了较好的效果,每亩增产粮食27.6～126斤(平均增产率9.7％),显著提高了经济效益。 根据每亩水稻各主要生育期要求土壤供应氮素的数量指标:栽秧时12斤、盛蘖期16斤、幼穗分化期20斤、孕穗期22斤, In 1984, our county quoted Guangdong’s rice nitrogen regulation technology and achieved good results in multi-point experiments. Grain yield per mu increased from 27.6 to 126 kg (the average rate of increase of 9.7%), significantly improving economic efficiency. According to the requirements of each main crop of rice per mu yield of nitrogen supply of soil indicators: when planting seedlings 12 pounds, 16 pounds of tillering stage, juvenile panicle of 20 kg, booting 22 kg,