作物学报2012，Vol.38Issue(8)：1494-1503,10.DOI:10.3724/SP.J.1006.2012.01494
不同质地土壤下缓释尿素与常规尿素配施对水稻产量及其生长发育的影响
Effects of Slow-Release Urea Combined with Conventional Urea on Rice Output and Growth in Soils of Different Textures
摘要
Abstract
Public attentions have been increasingly paid to the slow-release fertilizer (sulfur-coated urea, or SCU) which has developed quickly during the last decade. In this research, a field experiment with 270 kg ha-1 N fertilizer application was conducted in two kinds of soil (sandy soil and clay soil) using the early maturing late japonica variety Nanjing 44 as materials. The effects of fertilizing with sulfur-coated urea alone and mixing application of SCU and conventional urea (PU) on grain yield and plant growth were examined and compared. Results showed that compared with the treatment of PU applied alone, the treatments of SCU2, SCU2+PU(2:1), SCU1+PU(2:1) and SCU1+PU(1:1) showed significant increase in the rice yield, N accumulation, uptake and use efficiency, dry matter accumulation, ratio of stem-sheath usable carbohydrate to spikelets per panicle, and root a-NA oxidation ability that maintained a high level with a small reduction tendency. The grain yield, N uptake and use efficiency as well as dry matter accumulation in clay soil were slightly higher than those in sandy soil, and the root a-NA oxidation ability at heading and 10 days after heading were lower in clay soil than in sandy soil, while no apparent difference was found at 20 or 30 days after heading. In conclusion, the application of sulfur-coated urea or its combination with normal urea may both meet the basic needs of rice growth. Combination of SCU1 and PU has better effect than either fertilizer applied solely, the treatment of SCU2 has the best outcome, which is followed by treatment of SCU2+PU(2:1), and treatment of SCU2+PU(1:1) does not show a significant effect.关键词
缓释尿素/水稻/产量/生长发育Key words
Slow-release urea/ Rice/ Grain yield/ Growth and development引用本文复制引用
张小翠,戴其根,胡星星,朱德建,丁秀文,马克强,张洪程,朱聪聪..不同质地土壤下缓释尿素与常规尿素配施对水稻产量及其生长发育的影响[J].作物学报,2012,38(8):1494-1503,10.基金项目
本研究由国家自然科学基金项目(30971732,30671223)资助. （30971732,30671223）
