不同密肥条件下通粳981产量构成因子分析

目的]探明不同生产条件下穗数、粒数、粒重对产量的影响。方法]对通粳981在不同密度和肥料条件下形成的产量及其构成因子进行回归、相关和通径分析。结果]穗数、粒数和粒重对产量均有极显著的增产效应,其增产效应从大到小依次为穗数、粒数、粒重,其中穗数对产量起主要作用;但在基本苗较多或施N量较大的情况下,穗数和粒数的增产作用都很重要。结论]农业生产中可针对不同生产栽培条件,从产量构成因子中明确主攻目标,合理制定栽培技术措施,提高产量。

Analysis of Yield Components of Japonica Rice TongJing 981 under the Different Density and Fertilization Level

Objective] To investigate the effects of panicle number, grain number and grain weight on yield under different production condi-tions.Method] The yield and its constructions factors of Japonica variety of'Tongjing981' under different density and different fertilization lev-el was studied through regression and correlation and path.Result] The results showed that the panicle number and the grains number and the grain wight can rise yield very significantly.And its yield increase effect from big to small was panicle number, grains number, grain wight.And the panicle number plays a major role in yield;But the yield increase effect of panicle number and grain number was equally important when the basic seedlings awere more or the N fertilizer application rate was large. Conclusion] In agricultural production, we can make clear the main targets from the yield component factors, and formulate reasonable cultivation measures according to different production conditionsto increase the yield.