地处湘中的娄底地区近几年杂交早稻发展较快,1990年杂交早稻占早稻面积的28.8％,平均亩产479公斤,还出现了大面积(5000亩)亩产过580公斤和丘块亩产过650公斤的高产典型。据研究,杂交稻一般比常规稻多吸收氮20％、磷10％、钾25％以上。综合我区各地高产验收丘块资料,中等偏上肥力水平的稻田,亩产500公斤稻谷,每亩需施纯氮13～15公斤,五氧化二磷9～10公斤,氧化钾12～13公斤。研究证明,杂交稻中后期需肥量较常规稻多, Loudi, located in the middle of Hunan, has witnessed a rapid development of early hybrid rice in recent years. In early hybrid rice in early 2009, the hybrid rice accounted for 28.8% of the area of ​​early rice, with an average yield of 479 kg per mu and 580 kg of large-area (5000 mu) Yield over 650 kilograms of high-yield typical. According to the research, hybrid rice generally absorbs 20% more nitrogen, 10% phosphorus and 25% more potassium than conventional rice. Comprehensive high-yield acceptance of our region around the hill block data, middle-level upper fertility paddy fields, 500 kg of rice per mu, application of pure nitrogen per acre 13 to 15 kg, phosphorus pentoxide 9 to 10 kg, potassium 12 to 13 kg . Studies have shown that hybrid rice needs more fertilizer in the late rice than conventional rice,