植物营养与肥料学报2012，Vol.18Issue(2)：273-282,10.
西南稻区杂交中稻产量的地域差异及其高效施氮量研究
Regional yield variations and optimized application amounts of nitrogen of mid-season hybrid rice in Southwest China
摘要
Abstract
The variations of yield, panicle-grain structure and the optimum application amount of nitrogen of mid-season hybrid rice were studied by using the cultivars, II-you 7 and Yuxiang-you 203, in different ecological sites, soil nutrient statuses and N application levels in 2009. Data were analyzed by using variance, correlation, regression, path and partial correlations. The results show that there are significant or highly significant differences of grain yields and panicle-grain structure between the 7 sites, 4 fertilizer application treatments and 2 combination except for the maximum tillers and productive panicle. There are highly significant correlations between spikelets per panicle, seed setting percentage, 1000-grain weight and yield. The main goals for high yield would be increase the productive panicle and seed setting percentage, which would be achieved by increasing soil organic matter and available nitrogen content in southwest China. Multiple stepwise regression analysis shows that the optimize application amount of nitrogen of mid-season hybrid rice are significantly influenced by different ecological sites and soil nutrient statuses, and the determination coefficient ranges from 0. 9995 -0. 9999, which would be used as the scientific basis for the determination of the efficient applied N amount for full scale rice cultivation.关键词
杂交中稻/地理位置/土壤养分/高效施氮量Key words
mid-season hybrid rice/ecological site/soil nutrient/optimized nitrogen amount分类
农业科技引用本文复制引用
徐富贤,熊洪,张林,郭晓艺,朱永川,刘茂,周兴兵..西南稻区杂交中稻产量的地域差异及其高效施氮量研究[J].植物营养与肥料学报,2012,18(2):273-282,10.基金项目
粮食科技丰产工程 （）
西南水稻创新体系建设 （）
四川省学术带头人培养基金 （）
四川省水稻育种攻关 （）
四川省财政推广项目资助. （）
