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采用五因素二次旋转组合设计 ,对亚种间重穗型杂交稻Ⅱ优 1 6 2在攀西地区的超高产栽培技术模式进行了研究。结果表明 ,各试验因素对重穗型杂交稻产量的影响为施氮量 (x3) >施钾量 (x5 ) >密度 (x2 ) >施磷量 (x4) >播种期(x1)。增施氮、钾肥、适当增加密度是实现超高产的主要技术措施 ;在足穗的基础上攻大穗是超高产的关键。建立了攀西稻作区重穗型组合每公顷产量 1 1 2 5t以上的综合栽培技术 :3月下旬播种 ,栽插密度 32 2 5～ 33 75万穴 /ha,施N 2 0 6 5 5～2 2 0 2 0kg/ha,施P2 O5 76 95～ 88 80kg/ha ,施K2 O 1 83 1 5～ 1 89 30kg/ha。
A five-factor quadratic rotation combination design was used to study the super-high-yielding cultivation techniques of inter-intersubspecific panicle hybrid rice Ⅱ You 162 in Panxi. The results showed that the effects of different experimental factors on the yield of panicle type hybrid rice were as follows: nitrogen application rate (x3)> potassium application rate (x5)> density (x2)> phosphorus application rate (x4)> sowing time (x1). Increasing nitrogen and potassium fertilizer and increasing density are the main technical measures to realize super high yield. Attacking big spike on the basis of foot panicle is the key to super high yield. A comprehensive cultivation technique with a yield of 1152 ha per hectare in Panaxi rice-growing area was established: sowing in late March, planting density of 3225 ~ 3375000 points / ha, application of N 2 0655 ~ 22020kg / ha, applying P2 O5 76 95 ~ 88 80kg / ha and applying K2 O 1 83 15 ~ 1 89 30kg / ha.