硫包衣尿素对水稻养分吸收利用及土壤反应的影响  

Effect of Sulfur-coated Urea on Nutrients Uptake and Utilization and Soil Reaction of Rice

作　　者：汪吉东[1] 张永春[1] 郭巧云 朱普平[1] 胡永红[1] 

机构地区：[1]江苏省农业科学院农业资源与环境研究所,江苏南京210014 [2]贵州省玉屏县农业局,贵州玉屏554000

出　　处：《华北农学报》2008年第B10期293-297,共5页Acta Agriculturae Boreali-Sinica

基　　金：国际植物营养研究所项目(IPNIJiangsu-10);国家科技支撑计划项目(2006BAD25B07-03);江苏省农业科学院科研基金项目(6110618)

摘　　要：采用盆栽结合部分大田论证的试验方法,研究了硫包衣尿素（SCU）和常规尿素对水稻生长、营养元素吸收利用及增产效应和土壤反应的影响。结果表明：大田上SCU和常规尿素处理其产量分别是对照的1.20,1.11倍,盆栽试验下为对照的1.92,1.48倍;施肥量相同的SCU处理水稻产量比常规尿素处理增加10.93%~22.23%,SCU提高水稻产量的优势在于千粒重;同常规尿素相比,SCU促进了水稻对磷的吸收,对钾的影响不大。盆栽试验表明,施常规尿素和SCU的处理氮收获指数都随施氮量的增加而增加,等N量（N 0.15 g/kg土）和等施肥量（0.66 g/kg土）下,SCU处理其氮收获指数显著高于对应的常规尿素处理,施用SCU的处理其氮素的利用率也比常规尿素提高11.79%~20.25%,其氮肥利用率最高达57.58%;短期内适宜施氮量下SCU未降低土壤pH,但随着SCU施用量的增加,土壤酸化明显,且趋势超过常规尿素。Field together with pot experiments were carried out to study the effect of sulfur-coated urea（SCU） and urea on growth, nutrients uptake, utilization and soil reaction of rice. Results obtained were as following：In the field experiment, SCU and urea treated rice showed 20 % and 11% higher yield than that of control. 92 %, 48 % of pot experiments respectively ; Under same nitrogen fertilizer dose, rice fed with SCU got 10.93 % to 22.23 % higher yield than those of urea due to the greater thousand grain weight;Compared with urea, SCU had greater positive effects on rice P absorption. However, while no effects on K absorption was observed. Nitrogen harvest index was increased with the increasing of SCU and urea dose. At the same N usage of 0.15 g/kg and fertilizer dose of 0.66 g/kg, SCU treated rice got a signifi- cantly higher N harvest index. N use efficiency（NUE） in treatments with SCU was 11.79 % to 20.25 % hither than those of urea, with the greatest NUE at 57.58 %. Soil P pH was not significantly decreased under proper SCU usage in shortterm. However, increased use of SCU would lead to soil acidification, and with more significant trend in soil acidification than urea.

关 键 词：水稻 常规尿素 硫包衣尿素 土壤反应 

分 类 号：S511[农业科学—作物学] S145