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Controlled-release urea improved cotton productivity and nitrogen use efficiency in China: A meta-analysis
Agronomy Journal ( IF 2.1 ) Pub Date : 2021-04-28 , DOI: 10.1002/agj2.20702
Xiaofei Tian 1 , Zhen Fan 1 , Youxin Zhao 1 , Shuchen Sun 1 , Tingting Li 1 , Na Yu 1 , Sheng Zhai 1
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The use of controlled-release urea (CRU) is recommended to improve crop productivity without compromising environmental quality, but the overall effects on cotton (Gossypium hirsutum L.) growth are not well studied. A meta-analysis was conducted to evaluate the effectiveness and potential role of CRU in improving cotton productivity in China. The results indicated that CRU increased cotton yield by 9.8% and nitrogen use efficiency (NUE) by 19.4% relative to urea at equal N rates, although the increase in yield was not statistically significant. Cotton yield increases were greater in sandy-textured soil than in loam or clay soil, and in experiments sustained for more than 2 yr than in experiments sustained for 1 yr. In addition, the increase in NUE with CRU was enhanced at medium (170 < N ≤ 220 kg N ha−1) and high N rates (>220 kg N ha−1), at high CRU blending ratios (≥70%) and in soils with pH >7.5. These results demonstrate that CRU should be more widely used for cotton production in China, especially in sandy-textured soil with increased N application.
更新日期:2021-04-28
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