NUTRIENT BUDGETING IN TROPICAL AGROECOSYSTEM-MODELLING DISTRICT SCALE SOIL NUTRIENT BALANCE IN WESTERN ZONE OF TAMIL NADU USING NUTMON-TOOLBOX
Mining of nutrients from soil is a major problem causing soil degradation and threatening long-term food production in developing countries. This paper attempts to apply NUTrient MONitoring (NUTMON) methodology for carrying out nutrient audits, which includes the calculation of nutrient balance at a regional level and evaluation of trends in nutrientand erosion losses. In the present investigation an attempt was made for nutrient budgeting at district scale in a semi-arid region of South India, using NUTMON methodology. The study area covered two contiguous districts, viz., Coimbatore and Erode, which are potential agricultural areas in Western Zone of Tamil Nadu, India. The calculated nutrient balances for Erode and Coimbatore districts were negative for N (-3.3 and -10.1 kg ha-1 ) and K ( - 58.6 and -9.8 kg ha-1) and positive for P (+14.5 and 20.5 kg ha-1). Soil nutrient pool has to offset the negative balance of N and K, there will be an expected mining of nutrient from the soil reserve in the study area. The management options to mitigate this mining by manipulating all inputs and outputs in a judicious way with an integrated system approach are also discussed.
Nutrient balance Inputs Outputs Fertilizers manures NUTMON
U.Surendran V.Murugappan R.Jagadeeswaran A.Bhaskaran
Department of Soil Science, Center for Soil and Crop Management Studies, Tamil Nadu Agricultural University, Coimbatore 641 000, India
国际会议
北京
英文
259-271
2005-10-14（万方平台首次上网日期，不代表论文的发表时间）