不同基本苗对‘南粳51’产量及其构成的影响  

Effects of Basic Seedling on Yield and Yield Components of Rice Variety‘Nanjing 51'

作　　者：王军[1] 仲维功[1] 杨杰[1] 范方军[1] 朱金燕[1] 李文奇[1] 王芳权[1] 

机构地区：[1]江苏省农业科学院粮食作物研究所/国家水稻改良中心南京分中心,南京210014

出　　处：《中国农学通报》2015年第9期40-43,共4页Chinese Agricultural Science Bulletin

基　　金：国家科技支撑计划重大项目"江淮下游(江苏)粳稻持续丰产高效技术集成研究与示范"(2011BAD16B03);江苏省农业自主创新资金"高产优质多抗广适性水稻新品种选育及其示范"[CX(12)1003];公益性行业科研专项"粮食作物精确定量栽培技术研究与示范"(201303102)

摘　　要：合理的群体结构是水稻产量提高的基础,水稻基本苗是调节水稻群体结构的重要手段。为了研究不同基本苗对粳稻品种‘南粳51’产量的影响,进而为该品种的大面积推广应用提供理论依据。本研究以‘南粳51’为试验材料,在高产栽培条件下,研究了每穴不同栽插基本苗数下‘南粳51’产量及构成因素的变化。结果表明:株行距统一为13.3 cm×25 cm的条件下,‘南粳51’每穴4苗的实收产量最高,每穴5苗的实收产量最低,不同基本苗处理间实收产量顺序依次表现为4苗/穴>3苗/穴>2苗/穴>5苗/穴。随着每穴苗数的增加,‘南粳51’的单位面积有效穗数和结实率逐渐增加,穗粒数逐渐降低,千粒重几乎没有差异。产量构成因子与产量的回归和通径分析结果说明:‘南粳51’产量的提高主要依靠穗粒数的增加。The reasonable population structure is the basis of rice yield, basic seedling is an important meansto regulate the population structure of rice. The purpose of this paper was to research the impact of differentbasic seedling on japonica rice variety‘Nanjing 51＇yield to give theoretical support for popularization andapplication of‘Nanjing 51＇in large area. In the condition of high yield cultivation, the effects of different basicseedlings per hole on the yield and yield components were studied with rice varieties‘Nanjing 51＇. The resultsshowed that the actual production of‘Nanjing 51＇was the highest when planted four seedlings each holeunder the same plant and row spacing 13.3 cm×25 cm. With the increase of the seedlings number per hole, theactual production gradually increased except five seedlings each hole. With the increase of the number ofseedlings per hole, the effective panicles per unit area and seed setting rate increased gradually while grainnumber per panicle reduced with no differences in 1000-grain weight. Regression and path analysis of yieldcomponents and yield indicated that raising the yield of‘Nanjing 51＇relied mainly on the increasing of grainnumber per panicle.

关 键 词：水稻 基本苗 产量 '南粳51’ 

分 类 号：S31[农业科学—作物栽培与耕作技术]