杂交晚稻金优928高产优质栽培模式

对杂交晚籼稻金优928进行密度，氮肥，磷肥，钾肥4个因素，5个水平的正交旋转回归组合设计试验，结果表明，在中等肥力水平的土壤种植该组合时，只要肥力水平运用恰当每公顷可产稻谷6750kg以上。生产上宜采用每公倾插37.5-45万次，施纯氮210kg左右，施P2O560－75kg，施K2O90－105kg。若既要获得高产，又要保证稻米有较优的加工及外观品质时，可适当降低栽插密度和减少氮肥用量，增加磷，钾肥的用量。

Cultivation Model of High-yield, High-Quality for Late Indica Hybrid Rice Jinyou 928

In the experiment, late indica hybrid rice Jinyou928 was studied by means of quadratic orthogonal regressive rotation combination designed with four factors including planting density, nitrogen fertilizer, phosphorous fertilizer and potassium fertilizer, as well as five levels of each factor. The results showed that; the grain yield of this variety in the medium-level fertilizer was beyond 6 250 kg/hm2 by the appropriate combination of the planting density and fertilizers. The optimized cultivation model in practice was that planting density, N, P2O5, K2 O should be applied at the rate of 375 000-450 000 sockets/hm2, 210 kg/hm2, 60-70 kg/hm2, 90-105 kg/hm2 respectively. The experiments also indicated that planting density and the amounts of nitrogen should be decreased, application amounts of phosphorous and potassium fertilizer should be increased in order to obtain high yield and higher quality of milling and appearance.