【摘要】 研究了我国南方 6省的农田养分平衡现状和近 1 0年来的发展趋向。研究认为 ,氮素处于盈余过量且有继续增大的趋向 ,而大部分盈余的氮并未在生产上起作用却进入了环境 ,这对节约能源或保护环境都是不利的 ;磷素平衡一般也处于盈余状态 ,特别在某些省区也存在盈余过大的问题。根据这些地区出现的土壤磷的积累现象 ,从而提出了建立新的施磷肥制度的必要性。福建、广东、广西 3省 (区 )钾素处于盈余状态 ,这在全国并不多见 ;而浙、赣、湘 3省虽然处于亏缺状态 ,但近 1 0年来亏缺程度却有下降趋向更多还原

【Abstract】 Studies on the nutrient balance of agroecosystem in six provinces of Southern China showed that N supply in all of these provinces was in large surplus and the tendency continue to increase in recent 10 years (1986～1995).This may be one of reasons causing water environment problem in these area.This is also an indication of unreasonable use of N fertilizers.Phosphorus balance in these provinces also showed a surplus that exceed the need for crops.This already resulted in accumulation of P in soils in some regions.Potassium balance in China is generally in deficit but in three of the six provinces in Southern China it was in surplus.The potassium balance in the other three provinces was in deficit.But these deficit has the tendency to improve in the recent decade.更多还原