首页|Effects of organic fertilizers produced using different techniques on rice grain yield and ammonia volatilization in double-cropping rice fields
Effects of organic fertilizers produced using different techniques on rice grain yield and ammonia volatilization in double-cropping rice fields
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Ammonia(NH3)volatilization from rice fields contributes to poor air quality and indicates low nitrogen use efficiency.Although organic fertilizers can meet the nitrogen requirement for rice growth,the simultaneous effects of organic fertilizers on NH3 volatilization and rice yield in paddy fields are poorly understood and quantified.To address this gap in our knowledge,experimental field plots were established in a conventional double-cropping paddy field in the Pearl River Delta region,southern China.Five fertilizer treatments were used besides the control with no fertilizer:fresh organic fertilizer,successively composted organic fertilizer,chemically composted organic fertilizer,mixture of chemically composted organic fertilizer with inorganic fertilizer,and chemical fertilizer.Ammonia volatilization was measured using a batch-type airflow enclosure method.No significant differences in grain yield were observed among organic and chemical fertilizer treatments.However,compared with chemical fertilizer,chemically composted organic fertilizer and successively composted organic fertilizer significantly decreased total NH3 volatilization by 70％and 68％,respectively.The ammonium-nitrogen concentration in field surface water correlated strongly(P＜0.01)and positively with NH3 volatilization across fertilization treatments.Our findings demonstrate that chemically composted organic fertilizer can sustain rice yield while reducing NH3 volatilization.An important future step is to promote these field measurements to similar rice cultivation areas to quantify the regional-and national-scale impact on air quality and nitrogen deposition in sensitive areas,and to design and implement better fertilizer management practices.
air qualitycrop productionmanureNH3 emissionnitrogen use efficiency
Mingcheng HU、Andrew J.WADE、Weishou SHEN、Zhenfang ZHONG、Chongwen QIU、Xiangui LIN
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Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,and School of Environmental Science and Engineering,Nanjing University of Information Science and Technology,Nanjing 210044(China)
Department of Geography and Environmental Science,University of Reading,Reading RG6 6DW(UK)
Haina Research Institute of Guangdong Haina Agricultural Co.,Ltd.,Huizhou 516000(China)
State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008(China)
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国家自然科学基金Agricultural science and Technology Innovation Fund of Jiangsu,ChinaSpecially-Appointed Professor Program of Jiangsu,China江苏省"六大人才高峰"高层次人才项目Startup Foundation for Introducing Talent of NUIST,China
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