The experiment was conducted with 7 treatments,including no nitrogen treatment,normal urea,controlled loss urea,densi-ty network urea, urea containing zine, controlled loss urea one-time fertilization, and normal urea plus zine. The effect of new type urea on dynamic characteristics of SPAD value and yield of rice leaves in Xinyang area was studied by field experiment, aiming to providing scientific basis for large area spreading of new type urea in Xinyang area.The results showed that compared with the normal urea, new type urea could promote alternate phenomenon of the plant leaf of rice, which was helpful for sthenia of rice plant and plumpness of grain.At the tillering stage of rice,new urea could provide nitrogen nutrition of newly-growing leaves,and also guaran-tee nitrogen nutrition of leaves in the lower position.At the booting stage and heading stage,new urea could guarantee nitrogen nutri-tion of grain, and also consideration to nitrogen nutrition of leaves in rice plant. The effect of new urea on increasing production was significantly,compared with the normal urea,increase amplitude of rice yield was urea containing zine 6.23%,normal urea plus zine 5.35%, controlled loss urea 5.13% and density network urea 3.72% respectively. In summary, the effect of urea containing zine and controlled loss urea were better than the other new urea,which has excellent popularizing value in Xinyang area.%设置无氮对照、常规尿素、控失尿素、聚能网尿素、含锌尿素、控失尿素一次底施、常规尿素+锌共7个处理,通过大田试验,研究信阳地区水稻施用新型尿素对水稻叶片SPAD值变化特征及产量的影响,以期为新型尿素在信阳地区的大面积推广提供科学依据.结果表明:与常规尿素相比,新型尿素更能促进水稻植株叶片黑黄交替,更有助于水稻植株强壮和穗粒饱满.在分蘖期,新型尿素在供应新叶生长的同时也能保证水稻下位叶片的氮素供应;在孕穗期和抽穗期,新型尿素在保证稻穗发育的同时能更好的兼顾到水稻植株茎叶的生长.施用新型尿素的增产效果明显,与常规尿素相比,水稻产量增幅分别为含锌尿素6.23%、常规尿素+锌5.35%、控失尿素5.13%、聚能网尿素3.72%.综上所述,新型尿素中以含锌尿素和控失尿素表现较好,在信阳地区具有较大推广价值.
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