【摘要】 以优质食味水稻品种南粳9108为材料,进行了3种不同行距模拟机插试验。试验结果表明,行距20cm、25 cm机插水稻的栽插质量高于行距30 cm的栽插质量,其有效穗数显著高于行距30 cm机插水稻,但采用行距30 cm的插秧机更能改善水稻群体光能利用条件,实现壮秆大穗,提高总颖花量和粒重,增强抗病性,最终产量反而较采用行距20 cm、25 cm的处理高。更多还原

【Abstract】 Effects of different machine inserted row spacing(20 cm, 25 cm and 30 cm)on population characteristics and yield of late maturity japonica rice Nanjing 9108 were investigated. The results show that tiller number, leaf area index and dry weight of rice with machine inserted row spacing of 20 cm and 25 cm were higher than the row spacing of 30 cm rice before heading, and effective panicles per unit area was significantly higher than that of row spacing of 30 cm, but the grain number per spike, seed setting rate, grain weight were decreased than that of row spacing of 30 cm, the yield of row spacing of 30 cm rice was highest. The comprehensive index with row spacing of 30 cm were better than that of row spacing of 20 cm and 25 cm in Nanjing 9108.更多还原