中国水稻科学2012，Vol.26Issue(5)：555-562,8.DOI:10.3969/j.issn.1001-7216.2012.05.007
南方红壤区稻-稻连作体系下氮肥减施模式研究
On the Mode of Nitrogen-reduction in Double-rice Cropping Region in Red Soil Area of South China
摘要
Abstract
The grain yield and its components, economic benefits and soil fertility level were compared under eight treatments, namely zero nitrogen (N0 ). normal nitrogen level(NNL). 80% NNL (chemical fertilizers)and 20% farmyard manure (80F+20M). 80% NNL (chemical fertilizers). 30% NNL(chemical fertilizers )and 50% farmyard manure (30F+50M), 30% NNUchcmical fertilizers) and 50% controlled release nitrogen (30F+50S). 30% NNL (chemical fertilizers) and 50% green manure nitrogen in early rice and 80% NNL(chemica1 fertilizers )and fresh rice straw in late rice, and 80% controlled release nitrogen in a 3-year location test in South Jiangxi Province of China with the same P and K application levels. Under 30F+50M treatment and 30F+50S treatment, the grain yield were 4. 7% and 5. 2% higher than that in 80F, respectively, equal to NNL treatment. There was obvious difference in yield components factors among different nitrogen treatments. The effective panicle number per hectare and the spikelet number per panicle were significantly positively correlated with grain yield and seed setting rate was negatively correlatrrd with groin yield. Soil organic matter, total nitrogen, available nitrogen, available phosphorus contents and pH value in treatment 30F + 50M were higher than that in NNI. treatment by 21.3%, 7.0%. 34.7%, 4,9% and 4. 1%. The organic matter, available phosphorus, pH value were significantly higher than that in SOF treatment. There was no significant difference in other nitrogen reduction treatment compared with 80F treatment. Therefore, 30F + 50M, 30F + 50S were recommended ast the methods of fertilizer application with nitrogen reduction of 20% in double-rice cropping region in South China.关键词
氮肥减施/施肥模式/产量/经济效益/土壤肥力Key words
nitrogen reduction/ fertilization modei yields economic benefit/soil fertility分类
农业科技引用本文复制引用
侯红乾,冀建华,刘光荣,刘益仁,刘秀梅,程正新,杨俊诚,文石林..南方红壤区稻-稻连作体系下氮肥减施模式研究[J].中国水稻科学,2012,26(5):555-562,8.基金项目
国家973计划资助项目(2007CB109308 （）
2010CB951502) （）
国家科技支撑计划资助项目(2011BAD41B01) （2011BAD41B01）
国家自然科学基金资助项目(31101603) （31101603）
农业部作物营养与施肥重点实验室开放基金资助项目 （）
江西省科技支撑计划资助项目(2009BNA08800). （2009BNA08800）
