硫包衣尿素对水稻养分吸收利用及土壤反应的影响-华北农学报.PDF

华北农学报2008, 23( 增刊) : 293297 1 1 2 1 1 汪吉东 , 张永春, 郭巧云 , 朱普平, 胡永红 ( 1. , 210014; 2. , 554000) : , (S U) :S U 1.20, 1. 11, 1.92, 1.48 ; S U 10.93%~ 22. 23% ,S U ; ,S U ,, S U ,N (N 0. 15 g/ kg ) (0.66 g/ kg ) ,S U , S U 11.79%~ 20.25% , 57.58% ; S U pH, S U , , :; ; ; :S511;S145 :A : 1000- 7091(2008) - 0293- 05 Effect of Sulfurcoated Urea on Nutrients Uptake and Utilization and Soil Reaction of Rice 1 1 2 1 1 WANG Jidong , ZHANG Yongchun , GUO Qiaoyun , ZHU Puping ,HU Yonghong ( 1. Institute of Agricultural Resource and Environmental Sciences,Jiangsu Academy of Agriculture Science,Nanjing 210014, hina; 2.Agriculture Bureau of Yuping ounty,Yuping 554000, hina) Abstract: Field together with pot experiments were carried out to study the effect of sulfurcoated urea(S U) and urea on growth, nutrients uptake,utilization and soil reaction of rice.Results obtained were as following:In the field ex periment, S U and urea treated rice showed 20% and 11% higher yield than that of control. 92% ,48% of pot experi ments respectively; Under same nitrogen fertilizer dose, ricefed with S U got 10.93% to 22.23% higher yield than those of urea due to the greater thousand grain weight; ompared with urea, S U had greater positive effects on rice P absorp tion.However,while no effects on K absorption was observed.Nitrogen harvest index was increasedwith the increasing of S U and urea dose.At the same N usage of 0. 15 g/ kg and fertilizer dose of 0.66 g/ kg, S U treated rice got a signifi cantly higher N harvest index.N use efficiency(NUE) in treatmentswith S U was 11.79% to 20.25% hither than those of urea,with the greatest NUE at 57.58% .Soil P pH was not significantly decrea