Nitrogen Loss in Soil of Organic Agriculture and Its Control Procedure
LI Zhi fang(College of Horticulture, China Agricultural University, Beijing 100094, P.R.China)
The present paper reviews biogeochemical cycle of nitrogen in agroecosystem. It has been emphasized that although nitrogen leaching is reduced efficiently on organic farming, a possibility of leaching losses still exists. Organic fertilizers can only be available as plant nutrient after being biological degraded by microorganisms. This degrading process is continually and influenced by a variety of factors. Leaching of soluble nitrogen in organic agriculture resembles in conventional agriculture. The concept that soil is a stable storage for nitrogen may be not acceptable while nitrogen up-taken by plants and rational organic fertilizer utilization can reduce leaching efficiently.
【CateGory Index】： X53