不同栽培条件下小麦产量与其构成因子的关系

Studies on relationship among yield and its components under different cultivation conditions.

对不同生产水平和栽培条件下的小麦产量和构成因子进行了相关和通径分析。有效穗数与产量的相关不显著,与穗粒数和千粒重呈负相关,对产量的直接通径系数较小;每穗粒数和千粒重对产量的直接影响很大,每穗粒数与产量呈正相关,在高产区达极显著,千粒重与产量的关系,在较高播量下未达显著水平,而在稀播条件下达显著的正相关,且与每穗粒数表现正向联系。本研究结果表明,在较高的产量水平下,增加每穗粒数和千粒重是增产的方向。

Relation and path analysis on wheat yield and its components under different production level and cultivation conditions had been investigated. Ear number had no significant relation with yield,and was negatively related with grain number of ear or grain weight ,and its direct path coeffecient with yield was small. There were significant direct effects of grain number of ear and grain weight on yield. Grain number of ear had positive relation with yield. being highly significant in higher yield area. Grain weight had no significant relation with yield under higher planting density, but they were positively related significantly under lower density, in which condition grain weight was positive associated with grain number of ear. The results suggested that the way to increase yield in the area with higher production level was to improve grain number of ear and grain weight.