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EFFECTS OF VARIOUS PLANTING PATTERNS AND NITROGEN FERTILIZER APPLICATION METHODS ON YIELD OF SINGLE-CROPPING HYBRID Japonica RICE var. 8 YOU 161

Guan Yaozu 1) Zhang Zhenmin 2) Zhao Jian’gen 3) Ge Changqing 1) Dong Wenzhong 4) ( 1) Hangzhou Municipal Seed Company, Hangzhou 310020; 2) Hangzhou Municipal Agricultural Institute; Hangzhou 310008; 3) Yuhang  
The effects of various planting patterns and nitrogen fertilizer application methods on yield of single cropping hybrid Japonica rice var. 8 you 161 were investigated through experiments carried out in Hangzhou. The results showed that under medium soil fertility the highest grain yields were obtained when 210 and 270 kg/hm 2 of pure nitrogen were applied using the medium stage heavier fertilization method, and the third highest yield was obtained when 270kg N/hm 2 were applied using the early and late stage heavier fertilization method. The best plant density was 250000 plants/hm 2 combining one seedling per hole and planting spacing of 24.0cm×16.7cm, followed by the plant density of 250000 plants/hm 2 combining one seedling per hole and planting spacing of 30.0cm×13.3cm.
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