超级稻D奇宝优527的高产综合配套栽培技术

Comprehensive techniques for high yield cultivation of super hybrid rice D Qibaoyou 527

以超级稻D奇宝优527为材料,运用多元二次正交旋转回归模型研究播种量、栽插密度、氮肥施用量、移栽期和钾肥施用量对其产量的影响,探索适合其高产的优化栽培技术组合方案.结果表明:纯氮量(X4)、移栽期(X2)、K2O用量(X5)对产量的影响达极显著水平,播种量(X1)、种植密度(X3)对产量的影响达显著水平,5个因子对产量影响的大小顺序为:纯氮量(X4)>移栽期(X2)>K2O用量(X5)>播种量(X1)>种植密度(X3).影响产量的各因子间,播种量(X1)与种植密度(X3)间呈极显著的正互作关系,氮肥(X4)与钾肥(X5)间呈极显著的正互作效应,经模拟统计得出其优化的栽培技术组合为:作为中稻种植,播种量336.5-383.5 kg.hm-2,3月25日播种,5月3-4日移栽,每公顷插植15.15-18.30万丛,施纯氮185.25-195.30 kg.hm-2,施K2O 129.15-141.45 kg.hm-2.

The effects of sowing rate, transplanting density, nitrogen and potassium supplies, transplanting period on the yield of D Qibaoyou 527 were studied with multiple-dimension regression rotation analysis. The result indicated that the effects of N supply （X4 ） , transplanting period （X2 ） , K supply were extremely significant, while the effects of sowing rate （X1 ） , transplanting density （X5 ） were significant on the grain yield. The effects of five factors on yield were N supply 〉 transplanting period （X2 ） 〉 K supply 〉 sowing rate 〉 transplanting density. Among the five factors, the effect of sowing rate （X1 ） was positively correlated with trans- planting density （X5） , while the effect of N supply was positively correlated with K supply. The optimal combination of cultivation techniques was that： when D Qibaoyou 527 was used as middle rice, the sowing rate was 33.65 -38.35 g·m^-2, the day of sowing was March 25, the day of transplanting was May 3 or 4, the transplanting density was 15.15 - 1.83 clump · hm^-2 the N supply was 185.25 - 195.30 kg · hm^-2 and K supply was 129.15 - 141.45 kg · hm^-2.