Effects of Different Cultivation Methods and Nitrogen Fertilizer Application on Rice Yield

The kind of rice Wanxian 98 was investigated from yield of different sowing dates, nitrogen levels, planting density and planting seedlings per hole. The results indicated that delayed sowing would lead to slightly undulated yield firstly, and then began to decrease and the difference was significant. The effects of nitrogen application amount on yield was reduced after the first rise. Too low or too high planting density is not conducive to the improvement of the yield of Wanxian 98. The planting density of 16.5 cm×20.0 cm had the highest yield, and the yield up to 8506.5 kg / hm2. Per hole planting four, six or eight basic seedlings, higher yields can be obtained and the actual yield was 8 496.0 、8 569.5、8 470.5 kg / hm2 respectively.