Long-Term Fertilizer Optimization with Slow-Release and Organic Fertilizers Improves N Use Efficiency and Soil Bacterial Populations in Paddies
文献类型： 外文期刊
作者： Hou, Pengfu 1 ; Shi, Chao 3 ; Xu, Tingting 1 ; Xue, Lixiang 1 ; Wang, Jing 4 ; Liu, Qiang 1 ; 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.Beijing Inst Ecol Geol, Beijing 100120, Peoples R China
4.Nanjing Forestry Univ, Coll Forestry, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China
关键词： N loss; N utilization; Optimized fertilization; Paddy field; Soil bacterial community
期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.9； 五年影响因子：3.9 ）
ISSN： 0718-9508
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Optimized fertilization is often recommended in crop production. Clarifying its continuous benefits considering the soil response and feedback is crucial for sustainable agricultural development. An 8-year field experiment was carried out to evaluate the effects of successive fertilizer optimization with slow-release fertilizer (70% substitute, SRF) and organic fertilizer (partial (20%) substitute, OFPS; full (100%) substitute, OFFS) on nitrogen (N) fate in paddies with conventional split fertilization (CF) and no N-fertilizer input (N0) as the controls. Soil properties, as well as bacterial communities, were also analyzed. An overall increase occurred in plant N uptake in fertilized plots compared with that in the N0 control. The N use efficiency (NUE) of the CF treatment was identical to those of the SRF and OFPS treatments (39.14-43.90%), while OFFS treatment showed a lower value. Besides, optimized fertilization decreased NH3 volatilization and N leaching by 29.54-51.09% and 12.24-51.62%, respectively, particularly in the OFFS treatment. Unlike the reduction in organic inputs, N runoff in the SRF treatment was the highest in the 7th year and the lowest in the 8th year. Additionally, N2O emissions were insignificant among the different treatments. Paddy-water N concentration was the key factor affecting the fate of N, although soil properties also governed the N2O emissions and N runoff. Apparently, the soil bacterial community responded to the optimized fertilization, although their response varied with different strategies. Our findings revealed the efficacy of successive optimized fertilization on N fate, which can provide a basis for the sustainable fertilization of paddies.
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