应用∑X1=∑X2 =…… =∑X8=∑X13 =…… =∑X83 =∑X1X2 =…… =∑X7X8=∑X12 X2 =…… =∑X1X82=…… =∑X6X7X82 =…… =0的代码八元二次回归设计施肥试验 ,研究水稻在基肥、分蘖末期追肥、孕穗中期追肥、始穗期追肥的肥料用量的最佳组合效果。正常年份在潴育型水稻土上种植培矮 64S/E3 2 (单季稻 ) ,不同时期的最高产量施肥量(kg/hm2 ) ,基施 :N 14 0 .2、P2 O5163 .3、K2 O 13 1.2 ;分蘖末期追肥 :N 86.5 ;孕穗中期追肥 :N 96.7K2 O 10 0 .8;始穗期追肥 :N 3 5 .4K2 O 18.2。利用试验结果指导大面积的水稻施肥精度高 (施肥精度可达 95 %以上 ) ,具有高产量、高肥料投入效益的实际应用效果 Application ΣX1 = ΣX2 = ... = ΣX8 = ΣX13 = ... = ΣX83 = ΣX1X2 = ... = ΣX7X8 = ΣX12 X2 = ... = ΣX1X82 = ...... = ΣX6X7X82 = ...... = 0 code eight yuan regression regression design fertilization experiment to study the best combined effect of fertilizer on the base fertilizer, top dressing at the tillering stage, mid-booting top dressing, topdressing fertilizer. In normal years, Pei’ai 64S / E3 2 (single cropping rice) was planted on the paddy soil, with the highest yield of fertilizer (kg / hm2) in different periods. The basal application was N14.02, P2 O5163.3, K2O13 1.2; top of late tiller Top dressing: N 86.5; middle booting dressing: N 96.7K2 O 10 0 .8; beginning of the top dressing: N 3 5 .4K2 O 18.2. Using the test results to guide large-area rice fertilization with high precision (fertilization accuracy up to 95%), with high yield, high fertilizer efficiency into practical application