Use of the Nitrogen Index to assess nitrate leaching and water drainage from plastic-mulched horticultural cropping systems of Florida
作者机构：Instituto Federal de EducacaoCiencia e Tecnologia de BrasiliaCampus PlanaltinaDFRodovia DF-128-21-Zona Rural de PlanaltinaBrasilia-DF 73380-900Brazil University of Florida-Horticultural Science Department1241 Fifield HallGainesvilleFL 32611USA USDA-ARSSoil Management and Sugar Beet Research Unit2150 Centre Ave.Building DSuite 100Fort CollinsCO 80526USA Agronomy DepartmentUniversity of FloridaGainesvilleFLUSA Embrapa CerradosRod.BR 020km 18CP 08223CEP73310-970 Planaltina DFBrazil
出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)
年 卷 期：2016年第4卷第4期
页 面：237-244页
学科分类：0710[理学-生物学] 0818[工学-地质资源与地质工程] 09[农学] 0903[农学-农业资源与环境] 0815[工学-水利工程] 0901[农学-作物学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）] 090301[农学-土壤学]
主 题：Florida,nitrogen management Nitrate leaching Water leaching,vegetables,plastic mulch
摘 要：Water quality in Florida is significantly impacted by nitrate(NO_(3)-N)leaching losses from agriculture in a large part of the *** crops are planted across large areas of Florida on coarse sandy soils with low soil water retention and soil organic matter,increasing the potential for NO_(3)-N *** leaching losses from the root zone of vegetable cropping systems can negatively impact *** tools such as the Nitrogen Index(N-Index)are able to quickly assess N use efficiency and losses via NO_(3)-N leaching from agricultural ***,the N-Index provides technical information about N losses pathways tied to agricultural management practices with a great level of confidence;this information has been used by researchers,growers and policymakers as a decision support ***,the current version of the NIndex that has been used for different field crops has not been calibrated to be used in plastic-mulched horticultural cropping *** aim of this work was to calibrate and validate the N-Index for plasticmulched horticultural cropping systems of *** study found that the N-Index tool accurately identified and ranked the risk of N losses in the evaluated horticultural *** N-Index was calibrated for Florida s plastic-mulched horticultural cropping systems using a sensitivity *** adjusted N-Index was validated using compiled data of vegetables grown under plastic mulching systems during three consecutive *** from these studies suggest that the N-Index can be an easy-to-use tool capable of assessing nitrogen management practices for vegetable *** tool can be used to guide nutrient managers in the implementation of best nitrogen management practices that could contribute to reduced NO_(3)-N leaching losses from vegetable systems in Florida,contributing to a smaller environmental footprint and conservation of water quality.
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