Pedosphere 31(4): 511--520, 2021
ISSN 1002-0160/CN 32-1315/P
©2021 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Rice productivity and profitability with slow-release urea containing organic-inorganic matrix materials |
Yang YANG1, Binmei LIU1,2, Xiaoyu NI1, Liangzhi TAO1, Lixiang YU1, Ye YANG1, Mengxi FENG3, Wenjin ZHONG3, Yuejin WU1,2 |
1Engineering Laboratory of Environment-friendly High-efficiency Fertilizers and Pesticides of Anhui Province, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031 (China);
2The Innovative Academy of Seed Design, Chinese Academy of Sciences, Beijing 100101 (China);
3Henan Xinlianxin Fertilizer Co., Ltd., Xinxiang 453700 (China) |
| ABSTRACT |
| 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. |
| Key Words: ammonia emission,ferric sulfate,matrix-based fertilizer,montmorillonite,nitrogen leaching,path analysis |
| Citation: Yang Y, Liu B M, Ni X Y, Tao L Z, Yu L X, Yang Y, Feng M X, Zhong W J, Wu Y J. 2021. Rice productivity and profitability with slow-release urea containing organic-inorganic matrix materials. Pedosphere. 31(4): 511-520. |
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