直播稻密度对不同类型中粳品种产量的影响

Effect of Direct Seeding Rice Density on Yields of Different Medium Japonica Rice

[目的]探寻直播稻密度与不同类型中粳品种产量的关系。[方法]以镇稻99、连粳7号和淮稻5号为试验品种,分析基本苗密度对3个品种产量及其构成因素的影响。[结果]基本苗密度对3个品种产量影响不显著,淮稻5号基本苗密度为121.50万/hm2时产量最高;连粳7号基本苗密度为98.55万/hm2时产量最高;镇稻99基本苗密度为100.00万～111.00万/hm2时产量较高。[结论]直播稻镇稻99、连粳7号基本苗密度定在105.00万/hm2左右较为合适,而淮稻5号基本苗密度定在120.00万/hm2左右比较适宜。

[Objective] The aim was different medium japonica rice yields to explore tile relationship of direct seeding rice density anti [Method] With Zhengdao 99, Lianjin 7 and Huaidao 5 as the subjects, the effects of basic seedlings density on yiehls and constitute factors of 3 medium japonica rice were analyzed. [Result] The effects of basic seedlings density on yields of 3 medium japonica rice were not significant, the yields of Huaidao 5 was highest when the basic seedlings density was 121.50104 per hectare, the yiehts of Lianjin 7 was highest when the basic seedlings density was 98.55× 10^4 per hectare, the yields of Zhengdao 99 were highest when the basic seedlings density were 100 × 10^4 111×10^4 per hectare. [Conclusion] It was suitable when the basic seedlings density of Lianjin 7 and Zhengdao 99 were about 105.00 ×10^4 per hectare, and the basic seedlings density of Huaidao 5 was ahout 120.00 ×10^4 per hectare.