摘要
根据上海市松江区1993-2009年直播单季晚稻大田考察数据及同期气象数据,采用相关分析和通径分析方法,分析了影响直播单季晚稻产量结构的因素。结果表明:(1)大穗型品种和高产群体栽培法的推广是每穗总粒数增加、有效穗数减少的主要原因;(2)千粒重随每穗总粒数增加而减少,随开花灌浆期日照时数增加而增加;(3)8月下旬至9月中旬的降水量、暴雨日数是影响结实率的主要气象因子,结实率与气温的关系不密切,此结论与以往研究有所不同;结实率的年际波动是造成直播单季晚稻产量不稳定的主要因素;(4)产量结构要素对单产贡献依次为结实率、千粒重、每穗总粒数和有效穗数,单产变化的61.13%是由产量结构要素波动造成的。
The factors influencing yield components of direct-seeding rice were studied by correlation analysis and path analysis based on the observed data of the direct-seeding single-crop late rice and the meteorological data in Songjiang,Shanghai in 1993-2009.The results showed that 1）both the increase of total grain number per panicle and the decrease of effective panicle number of rice resulted mainly from the popularization of large-ear rice varieties and high-yield population culture method;2） The 1 000-grain weight increased with the total grain number per panicle decreasing or with the sunshine duration increasing in flowering and filling period;3）The seed-setting rate was influenced largely by the rainfall amount and rainstorm days from late August to mid September and was not closely related to air temperature,and its interannual fluctuation was a major factor making the direct-seeding rice yield unstable;4）The descending order of yield components＇ effects on rice yield was seed-setting rate,l 000-grain weight,total grain number per panicle,and effective panicle number.The 61.13%of rice yield variation was caused by the yield components＇ fluctuation.
出处
《上海农业学报》
CSCD
北大核心
2010年第4期95-99,共5页
Acta Agriculturae Shanghai
基金
上海市气象局研究型项目(yj200905)资助
关键词
直播水稻
产量结构
相关分析
通径分析
Direct-seeding rice
Yield component
Correlation analysis
Path analysis
