机插水稻高产栽培关键技术的适宜值

Appropriate parameters for high-yielding cultivation of machine-transplanted rice.

在大田栽培条件下，以武香粳14为材料，对机插水稻的育秧、移栽、肥料运筹等高产栽培技术适宜值进行研究．结果表明，芽谷播量以每盘（1624em。）150～180g为最佳；壮秧剂处理的秧苗质量与机插质量均好于其它复合肥处理，复合肥处理苗床的用量以N：P2O5：K2O=10：10：5及150g·m^-2复合肥较好；双膜育秧的秧苗须在播后21d内机插大田；小棵密植（取秧面积1．26cm^2、株距11．7cm、行距30cm）有利于提高机插水稻的个体质量及群体水平；大田施N量为315kg·hm^-2、基蘖肥：穗肥=6：4的处理产量最高．单位面积总颖花量的显著提高是机插水稻产量增加的主要原因．

A field experiment with japonica rice variety Wuxiangjing 14 in 2002 - 2005 showed that the appropriate sowing rate was 150 - 180 g per tray （ 1 624 cm^2） , seedling-strengthening agent was more conducive than compound fertilizer in improving the quality of machine-transplanted seedlings, the rational dose of compound fertilizer （N- P205-K20） was 150 g · m^-2, seedlings should be machine-transplanted within 21 days after sowing, densely planting a fewer seedlings in each cluster could improve the individual and population quality of machine-transplanted rice, and applying 315 kg · hm^-2 of N and 6：4 of basal-tillering： heading fertilizer could obtain the highest rice yield. The marked increase of glumous flowers per unit area was the main cause of the increase of machine-transplanted rice yield.