Effect of fertilization on nitrogen losses through surface runoffs in Chinese farmlands: A meta-analysis
文献类型： 外文期刊
作者： Hou, Pengfu 1 ; Jiang, Yu 2 ; Yan, Lei 1 ; Petropoulos, Evangelos 5 ; Wang, Jinyang 2 ; Xue, Lihong 1 ; Yang, Linzhang 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Key Lab Agroenvironm Downstream Yangze Plain, Minist Agr & Rural Affairs China, Nanjing 210014, Peoples R China
2.Nanjing Agr Univ, Nanjing 210095, Peoples R China
3.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212001, Jiangsu, Peoples R China
4.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Peoples R China
5.Newcastle Univ, Sch Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
6.Univ Melbourne, Sch Agr & Food, Fac Vet & Agr Sci, Melbourne, Vic 3010, Australia
关键词： Farmland; N surface runoff; Meta-analysis; Fertilizer type; Fertilization strategy
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）
ISSN： 0048-9697
年卷期： 2021 年 793 卷
页码：
收录情况： SCI
摘要： Surface runoff is the main cause of farmland nitrogen (N) losses in plain areas, which adversely affect water quality. The impact of fertilization on N runoff loss often varies. A meta-analysis was performed using 245 observations from 31 studies in China, to estimate the response of N loss in both paddy and upland fields subjected to different fertilization strategies, and investigate the link between N runoffs, soil properties, as well as precipitation in the planting season. The results showed that compared to the control (without fertilization), N losses subjected to fertilization increased from 3.31 kg/ha to 10.03 kg/ha and from 3.00 kg/ha to 11.24 kg/ha in paddy and upland fields respectively. Importantly, paddy N loss was significantly correlated with fertilizer type and N application rate (predictors); in upland fields N application rate and seasonal precipitation were the main driving factors. For the N application rate, N loss increased with increase in rates for both paddies and upland fields. Moreover, the N loss from upland fields increased with the precipitation during planting season. Between the three fertilizers used in paddies, the increase in loss of CRF (controlled release fertilizer) or OF (organic fertilizer) was lower than that of CF (inorganic chemical fertilizer) with the lowest value in CRF. Subset analysis showed that the effect of CRF and OF in paddies was not affected by the predictors, revealing the steadily controlling property of CRF and OF in paddies. Also, all the predictors had an insignificant impact to N loss risk in paddies during the high application rate. Overall, the results confirm the importance of N dosage in N runoff loss from farmland. Fertilizer type is a key consideration for N loss control in paddies, while the seasonal precipitation should not be ignored in upland fields. (c) 2021 Elsevier B.V. All rights reserved.
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