Effects of controlledrelease coated urea on grain yields and nitrogen use efficiencies of rice under traditional flooding cultivation and nonflooded plastic film mulching cultivation

›› 2012, Vol. 24 ›› Issue (3): 0-372.

• 论文 •

Effects of controlledrelease coated urea on grain yields and nitrogen use efficiencies of rice under traditional flooding cultivation and nonflooded plastic film mulching cultivation

YANG Jing;LIU Yan-ling;WU Liang-huan;*;CHEN Hong-kun

1Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029， China; 2Key Laboratory of the Subtropics Soil and Plant Nutrition in Zhejiang Province, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029， China; 3National Engineering and Technology Research Center for Slow/Controlled Release Fertilizers, Linyi 276700,China

Received:1900-01-01 Revised:1900-01-01 Online:2012-05-24 Published:2012-05-24

Abstract

Abstract: A field experiment was conducted to determine effects of controlledrelease coated urea on grain yields and nitrogen use efficiency of rice variety Xiushui 134 under traditional flooding cultivation and nonflooded plastic film mulching cultivation. The results showed that the rice grain yields of single basal application of sulfurpolyester resincoated urea (SPCU 100%)under the nonflooded mulching and traditional flooding cultivation were increased by 5.7 and 9.7% (P<0.05), respectively; whereas nitrogen use efficiencies of these two treatment were improved by 110.3% and 78.4% (P<0.05), respectively, compared to the normal urea PU100% (N 180 kg·hm-2). Agronomic nitrogen use efficiencies were also significantly increased. Grain yields of rice with same N fertilizer rates under nonflooded plastic mulching cultivation were not significantly higher than that under traditional flooding cultivation, except the PU 100% treatment, but the nitrogen use efficiency were significantly higher．

Key words: rice, nonflooded plastic film mulching cultivation, coated urea, grain yield, nitrogen use efficiency

YANG Jing;LIU Yan-ling;WU Liang-huan;*;CHEN Hong-kun. Effects of controlledrelease coated urea on grain yields and nitrogen use efficiencies of rice under traditional flooding cultivation and nonflooded plastic film mulching cultivation[J]. , 2012, 24(3): 0-372.

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Effects of controlledrelease coated urea on grain yields and nitrogen use efficiencies of rice under traditional flooding cultivation and nonflooded plastic film mulching cultivation

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