摘要
The yield and yield components of Japonica variety Tongjing 981 under different density and fertilization levels were studied through regression and correlation and path analysis. The results showed that the number of panicles per unit area, number of filled grains per panicle and 1 000-grain weight all had very significant yield increasing effects, and the number of panicles per unit area played a leading role. However, the yield increasing effects of the number of panicles per unit area and number of filled grains per panicle are equally important when the basic seedlings are more or the N fertilizer application rate is large. In practical production, a major factor should be determined among the yield components, and rational cultivation measures should be taken accordingly, to improve yield.
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。结果表明: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。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。
基金
Supported by National Spark Program(2013GA690123)
Agricultural New Variety Postsubsidy Project of Major Research and Development Programof Jiangsu Province(BE2016398)~~
