中国农业科学2012，Vol.45Issue(10)：1904-1913,10.DOI:10.3864/j.issn.0578-1752.2012.10.003
立体生态区水稻定量促控栽培技术的增产机理
Research on the Mechanism of Grain Yield Increase of Rice by Quantitative Intensifying and Controlling Cultivation Under an Erect Ecology in Yunnan Province of China
摘要
Abstract
[ Objective 1 In order to research the mechanism of grain yield increase of rice by Quantitative Intensifying & Controlling Cultivation (RQICC, RP), which is a new cultivation for grain yield increase by less cost, in Yunnan Province, where there is an erect ecology, and divided into 6 environments for rice production. [Method] Field experiments were carried out in areas where the elevations are 750 and 2700 m above the sea level in Yunnan Province in 2008 and 2009. The contrast tests between RP and conventional cultivation of the main rice varieties, whose covering area was more than 1000 hm2 in the counry, were carried out in six environments. The leaf age and tiller number were counted per week after transplanting. And the grain yield and its components were measured at mature stage. [ Result ] Grain yield increased by 16.0% and 15.8% for Indica and Japonica by RP in 2008, respectively, and by 18.3% and 15.3% in 2009, respectively. More spikelet per m2 was the main factor for grain yield increase as the number of panicle per m2 or number of spikelet per panicle increased by RP cultivation. And there was no difference in seed setting rate and grain weight between two cultivations. The crop population values of 12 t-hm'2 grain yield rice under different environments were listed. I Conclusion] Enough spikelet per m2 land was the base of high grain yield rice under different environments. This is a right way to increase grain yield by increasing spikelet number per m2, through increasing panicle-maximum tiller rate and using more nitrogen as panicle fertilize to initiate and keep more spikelet.关键词
水稻/立体生态区/水稻定量促控/增产Key words
rice/ erect ecology/ RQICC/ increased grain yield引用本文复制引用
杨从党,李刚华,李贵勇,夏琼梅,邓安凤,刘正辉,王绍华,凌启鸿,丁艳锋..立体生态区水稻定量促控栽培技术的增产机理[J].中国农业科学,2012,45(10):1904-1913,10.基金项目
云南省科技创新强省计划(2010AD008)、云南省创新人才培养计划(2011CI058)、国家科技支撑计划(2011BAD16B14) （2010AD008）
