Rice productivity and profitability with slow-release urea containing organic-inorganic matrix materials

作     者：Yang YANG Binmei LIU Xiaoyu NI Liangzhi TAO Lixiang YU Ye YANG Mengxi FENG Wenjin ZHONG Yuejin WU Yang YANG;Binmei LIU;Xiaoyu NI;Liangzhi TAO;Lixiang YU;Ye YANG;Mengxi FENG;Wenjin ZHONG;Yuejin WU

作者机构：Engineering Laboratory of Environment-friendly High-effciency Fertilizers and Pesticides of Anhui ProvinceHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031(China) The Innovative Academy of Seed DesignChinese Academy of SciencesBeijing 100101(China) Henan Xinlianxin Fertilizer Co.Ltd.Xinxiang 453700(China) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2021年第31卷第4期

页      面：511-520页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by the National Key R&D Program of China (No.2017YFD0301302) the National Natural Science Foundation of China (Nos.31601828 and 31500300) Anhui Science and Technology Major Project (No.18030701205) the Science and Technology Service Network Initiative of Chinese Academy of Sciences (No.KFJ-STS-QYZD-008) 

主　　题：ammonia emission ferric sulfate matrix-based fertilizer montmorillonite nitrogen leaching path analysis 

摘      要：Applying slow-release fertilizers is possible means for reducing nitrogen(N) loss in rice production. Matrix-based fertilizers represent novel slow-release fertilizers. To date, there is little consensus about the effect of combined addition of organic and inorganic matrix materials on rice production. We developed a slow-release urea fertilizer with selected organic and inorganic matrix materials. The study aimed to: i) determine the effect of the slow-release urea on rice yield, profit, and agronomic efficiency and ii) elucidate its possible mechanisms. A two-year field experiment was conducted during 2015–2016. Besides,laboratory experiments were conducted to determine the potential N loss risk. Three treatments were set up: control without N application(CK), regular urea treatment(RU, 150 kg N ha^(-1)), and slow-release urea treatment(SU, 150 kg N ha^(-1)). The results showed that rice biomass and grain yield were significantly higher in SU than in RU(P 0.05). The higher panicle density in SU was largely responsible for the greater grain yield. Net profit in SU was US$450 ha^(-1), higher than in RU. Agronomic efficiency was significantly greater in SU than in RU(P 0.05). Rice height, root area, leaf chlorophyll, leaf nitrate reductase activity, and leaf glutamine synthetase activity were larger in SU than in RU. Less N loss and greater soil N availability were partly responsible for the improvements in rice growth traits and physiological parameters in SU. Overall, the slow-release urea is a promising fertilizer for rice production.