摘要
采用盆栽试验的方法研究了不同硫包膜尿素用量及不同外加硫膜用量对土壤性质及水稻产量和品质的影响。结果表明:适量硫膜可改善土壤中Ca,Mg的活化程度,而过量硫膜则会抑制其活化。硫膜明显增加了土壤中水溶性SO42-的积累。所有试验处理中,以硫包膜尿素高量处理最佳,其水稻产量最高,比无氮处理增产73.01%,较等氮量普通尿素处理增产11.89%;并且该处理的水稻籽粒粗蛋白质含量最高,达8.91%。硫包膜尿素处理低量、中量和高量的氮素利用率分别高出普通尿素处理9.42%,8.59%和21.19%。适量硫膜可提高水稻对氮肥的氮素吸收利用率,增加水稻产量;而施用过量硫膜则导致氮素利用率相对降低和产量下降。
The effects of different application levels of sulfur-coated urea and sulfur-coating left on soil property and growth of rice in pot experiment were investigated. The results indicated that an adequate supply of sulfur enhanced the activation ability to Ca,Mg, however, the excessive amount of sulfur inhibited the activation ability. Sulfur obviously increased the SO4^2- accumulation in soil. Among all experimental treatments, the treatment of higher sulfur-coated urea had a highest grain yield which was 73.01% and 11.89% higher than CK and Urea, respectively. The crude protein content of rice with SCU3 treatment was 8.91% and the highest among all the treatments. Compared with the treatment Urea, the nitrogen use efficiency of lower, medium and higher sulfur-coated urea were increased by 9.42%, 8.59% and 21.19%, respectively. The adequate supply of sulfur could raise the nitrogen use efficiency and enhance the rice yield; but the excessive amount of sulfur resulted in the nitrogen use efficiency and the rice grain yield decrease.
出处
《水土保持学报》
CSCD
北大核心
2009年第2期193-197,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(30871593)
“十一五”国家科技支撑计划项目(2006BAD10B07)
山东省自然科学基金项目(Y2008D29)
关键词
硫包膜尿素
硫膜
土壤性质
水稻生长
sulfur-coated urea
sulfur-coating, soil property
rice growth
