沙地水稻各农艺性状与产量关系的回归分析

The Regression Analysis Between the Yield and Main Agronomic Characters of the Sand Rice

采用通辽地区沙地水稻生产上常用的品种为试验材料,对其产量与主要农艺性状进行了相关及多元回归分析,结果表明:水稻单穴产量与结实率和千粒重呈显著正相关,与空粒数呈显著负相关,与其它性状呈不显著负相关;通过逐步回归分析建立了数学模型,通径分析结果表明,穗长、实粒数、千粒重对产量具有正向效应,而生育期、株高、分蘖数却对水稻的单穴产量具有负向效应.在沙地衬膜条件下,应选择穗长、生育期适中、千粒重大、分蘖数较少、实粒数多、株高适中的品种易获得高产.

Using the common varieties in Tongliao sand rice production, the yield and the main agronomic characters are disposed by correlation analysis and multiple regression analysis. The results show that is significant positive corre- lation between single cavity production of rice and setting percentage,thousand-grain weight, is significant negative correlation with empty grain number, is not significant negative correlation with other characters. Through the stepwise to establish the mathematical model, path analysis results show that ear length, grain number and thousand-grain weight have positive effect on the production, but growth period, plant height and tiller number have negative effect on the single cavity production of rice. In the sand lining membrane conditions, choosing variety of moderate ear length and growth period, high thousand-grain weight, less tiller number, many grain numbers, moderate plant height, to ac- quire high yield.