Effects of Nitrogen and Planting Density on Yield and Planting Effect of Rice

The effects of planting density and N application amount on yield and planting effect of rice were studied with high quality and mid-season rice variety Tonggeng 1. The results were as follows: N application in (0～450) kg/hm~(2),the rice yield were increased with the increase of N application , but the increase rate descent. The rice yield were the most high while the N application lower than 337.5 kg/hm~(2) and the 13.5×10~(6)/hm~(2) of the planting density , and the N application at 450 kg/hm~(2) the rice yield were raised with the decrement of planting density. The planting effect were most high while the N application in (225～337.5) kg/hm~(2), the income were the biggest as N application at 450 kg/hm~(2) and the 9×10~(6)/hm~(2) of the planting density , or as N application at 337.5 kg/hm~(2) and the 4.5×10~(6)/hm~(2) of the planting density. The fertilizers effect were decreased with the increase of N application.