后季稻南粳38旱育抛栽产量构成因子分析

对南粳 3 8后季稻在不同密度、肥料条件下形成的产量及其构成因子进行相关、回归和通径分析。结果表明 :穗数和粒数对产量有显著的增产效应 ,粒重的增产效应不明显。在密度小或施肥量少的情况下 ,穗数比粒数的增产作用大得多 ;在密度大或施肥量多的情况下 ,穗数和粒数的增产作用差异不大 ;而在通常情况下 ,穗数的增产作用 >粒数的增产作用。在不同的生产栽培条件下 ,可先从产量构成因子中明确其主攻目标 ,再合理制定栽培管理技术措施 ,以利提高后季稻产量

Analysis of Yield Components of Rice Variety-Nanjin 38

The yield and its constructions factors of later rice Nanjing 38 under different density and different fertilization level was studied through correlation and regression and path. The results showed that the number of panicle and grains can significantly rise yield, and the grain wight didnt. The panicle number had much more efficiency on yield than grain number under the lower density or the less fertilizer. There was a little difference of the effects on yield between the panicle number and grains number under the higher density or the more fertilizer. In general, the effect of panicle number on yield was much more than the effect of grains number on yield.