Study on Interactive Effect of Nitrogen and Sulfur on Rice

The experimental results showed that sulfur fertilization on early rice and nitrogen fertilization on late rice could extremely significantly increase rice yield, the rate of yield increase being 5.1%～9.9% and 32.6%～38.5% respectively, but the interactive effect of nitrogen and sulfur on early and late rice was not significant. Sulfur fertilization on late rice could obviously increase the plant height of rice, but under the condition of applying nitrogen simultaneously, it could markedly decrease the setting rate of rice. Both applying nitrogen fertilizer and applying sulfur fertilizer could significantly enhance the rate of nitrogen and sulfur uptake of rice. Sulfur fertilization could enhance the recovery of nitrogen fertilizer by 3.74%～11.4%, nitrogen fertilization could enhance the recovery of sulfur fertilizer by 12.8%～35.3%. In view of economic benefit and environment protection, the combinative application of nitrogen at 120kg/hm\+2 and sulfur at 30kg/hm\+2 had the best effect on rice.