摘要
优质高产油菜新品种中双9号不同栽培密度试验结果表明,以每公顷16.5万株产量最高,达2382.3kg,分别比每公顷21.0万株、12.0万株、27.0万株、7.5万株增4.65%、8.87%、9.37%、21.07%;不同栽培密度对产量构成因素影响最大的是单位面积总角果数,然后才是千粒重和角粒数;不同栽培密度影响了植株形态长相的变化,随着密度的增加,株高逐渐降低,分枝部位逐渐增高,一次分枝数减少,一次分枝角果数逐渐减少,但主花序角果数占总角果数比例显著提高。可见合理密植主要是增加了单位面积总角果数,从而达到了提高单位面积产量水平的目的。
Experiment on different planting densities for rape cultivar Zhongshuang No. 9 was carried out. It was showed that Zhongshuang No. 9 yielded 2382.3 kg/hm2 on average under planting density of 1.65×105plants/hm2?熏 4.65%?熏 8.87%?熏 9.37% and 21.07% higher than that of 2.1×105 plants/hm2?熏 1.2×105 plants/hm2?熏 2.7×105 plants/hm2 and 7.5×104 plants/hm2?熏 respectively. The largest effect of planting density was found in total pods per unit area?熏 then on 1000-seed weight and seeds per pod. The plant agronomic traits were affected by the different planting densities. With density increasing?熏 plant height dropped?熏 the first primary branch went height?熏 the primary branches decreased?熏 pods in primary branches decreased and the ratio of pods in main inflorescence to total pods increased significantly. It was indicated thereby that the rational density benefits the increase of total pods per unit area in order to obtain high yield per unit area.
出处
《湖北农业科学》
北大核心
2004年第3期39-41,共3页
Hubei Agricultural Sciences
基金
中日政府合作项目
