不同播期对迟熟中粳稻扬20238产量的影响  

Effects of Different Sowing Date on Yield of Late-maturing Middle Japonica Rice Yang 20238

作　　者：张在金 马玉银[1,2] 周炳庆 柏银传 

机构地区：[1]扬州大学实验农牧场,江苏扬州225009 [2]扬州教育学院,江苏扬州225009

出　　处：《安徽农业科学》2008年第28期12132-12133,共2页Journal of Anhui Agricultural Sciences

摘　　要：[目的]寻求中粳稻扬20238的适宜播种期。[方法]在大田试验中,设6个播期(5月8日1、5日2、2日2、9日、6月5日1、2日),调查各播期水稻叶龄、始穗期、株高、单株产量及产量构成因素,分析不同播期对所调查性状的影响。[结果]在5月8日至6月12日期间,随着播期的推迟,扬20238主茎叶片数减少、播始历期缩短;不同播期单株产量存在极显著差异,5月8日播种时单株平均产量最高(27.9g),随播期推迟,单株产量逐渐降低;各播期单株有效穗数达到显著差异、穗粒数达到极显著差异,5月8日播种时单株有效穗数和穗粒数较多,分别为8.2个和140.7个;随播期推迟,结实率和千粒重也逐渐降低。[结论]中粳稻扬20238的适宜播种期为5月上旬。[Objective] The study was to seek the suitable sowing date of middle japonica rice Yang 20238. [Method] In the field test with 6 sowing dates （May 8, 15, 22 and 29, June 5 and 12）the leaf age, initial heading stage, plant height, yield per plant and yield components were investigated to analyze the effect of different sowing dates on the characters investigated. [ Result] During May 8 to June 12, the leaves number on main stem was decreased and the duration from seeding to heading was shortened with the delaying of sowing date.The yield per plant in different sowing dates bad extremely significant difference, the average yield per plant sowed on May 8 was the highest （27.9 g）, and it was gradually decreased with the delaying of sewing date. The effective panicle number per plant bad significant difference and the grain number per spike had extremely significant difference in different sowing dates and they got mere when Yang 20238 was sewed on May 8 being 8.2 and 140.7 resp. The seed setting rate and 1 000-seed weight were also gradually decreased with the delaying of sowing date. [Conclusion] The suitable sowing date for middle japonica rice Yang 20238 was the first ten days on May.

关 键 词：粳稻 播期 生育期 产量 产量构成因素 

分 类 号：S511[农业科学—作物学]