Effects of new urea application on rice yield and nitrogen use efficiency in southern Henan
GUO Xiao-yan, PAN Zi-liang, ZHANG Li-xia, CHEN Xue-qing, SHI Peng-fei, LYU Yu-hu, NIE Liang-peng, ZHANG Lin, LING Jing-wei, GUO Jing-li
2019, 58(15):
19-21.
doi:10.14088/j.cnki.issn0439-8114.2019.15.004
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The experiment was conducted with 7 treatments, including no nitrogen treatment（CK1）, normal urea（CK2）, controlled loss urea, density network urea, urea containing zine, controlled loss urea one-time fertilization, normal urea plus zine. Field experiments were conducted to study the effectts of new type urea on rice （Oryza sativa L.） yield and nitrogen use efficiency in southern Henan province, and hope to providing scientific basis for large area spreading of new type urea in southern Henan province. The results showed that, compared with the normal urea, the yield of rice with new type urea all increased by 1.61%~6.23%, among them, the increase rate of urea containing zine, controlled loss urea, and normal urea plus zine were more than 5%. In terms of chlorophyll content, compared with the normal urea, all of new type urea showed better. In terms of agronomic efficiency of nitrogen and nitrogen partial factor productivity, urea containing zine and controlled loss urea were better than others. In terms of nitrogen use efficiency, the best performance was controlled loss urea one-time fertilization, and reached 42.3%. In summary, urea containing zine and controlled loss urea can significantly increase rice yield and nitrogen use efficiency, and has the potential for extension and application in large area in southern Henan.
