植物营养与肥料学报2011，Vol.17Issue(2)：269-275,7.
基蘖肥与穗肥氮比例对双季稻产量和碳氮比的影响
Effects of nitrogen application on yield and C/N of double-cropping rice
摘要
Abstract
The experiment was conducted to study effects of different ratios of basic and tillering, and panicle nitrogen fertilization on yield, dry matter accumulation, nitrogen accumulation and the ratio of carbon and nitrogen of double-cropping rice. The results show that when the total nitrogen rate is N 225 kg/ha, the yield is the highest under the treatment which the ratio of basic and tillering nitrogen amount to panicle nitrogen amount is about 7:3,the followings are the treatments of ratios of 6:4 and 8:2, which are all higher than that of the conventional nitrogen application pattern (10:0). When the ratio of basic and tillering nitrogen application to total nitrogen application amount is from 60％ to 70％ of double-cropping rice, the dry matter accumulation, nitrogen accumulation, nitrogen utilization efficiency, N-agronomy efficiencyare all increased under the ratio of 7:3, the carbon metabolism and nitrogen metabolism are also in a good coordination. The usable carbohydrate including soluble sugars and starch of early rice leaf at booting stage is 17％-18％, C/N is 5.0 -5.5, and the usable carbohydrate of late rice is 19％-21％ and C/N is 5.0 -6. 0. These would be the physiological base of getting higher rice yield when the ratios are 7 :3 and 6:4. In all, synthesizing the yield, nitrogen utilization efficiency and C/N of double-cropping rice, the ratio of nitrogen application at the panicle stage of rice to total nitrogen application amount is from 30％ to 40％.关键词
双季稻/氮肥运筹/产量/氮素利用/碳氮比Key words
double-cropping rice/ nitrogen application/ grain yield/ nitrogen utilization/ C/N分类
农业科技引用本文复制引用
林忠成,李土明,吴福观,张洪程,戴其根,叶世超,郭宏文..基蘖肥与穗肥氮比例对双季稻产量和碳氮比的影响[J].植物营养与肥料学报,2011,17(2):269-275,7.基金项目
国家粮食丰产科技工程项目(2006BAD02A03) （2006BAD02A03）
国家自然科学基金项目(30671223)资助. （30671223）
