人工牧草地的氮磷环境及其流出特性的研究

The Nitrogen and Phosphorus Environment and Its Effuent Characteristics in Artificial Tame Pastures.

在农场试验地的调查实验结果表明 ,牧草地土壤全氮和全磷含量主要存在于土表 ,分别为 2 16 0mg/kg和 12 30mg/kg。溶出实验结果发现 ,酸性条件、温度以及时间对土壤中氮、磷的溶出有明显的促进作用。调查同时表明 ,土壤空隙水中氮、磷对地下水水质不会造成显著影响 ;而降雨时地表流出水中全氮的浓度超出环境标准 ,全磷超出环境标准的 8～ 11倍 ,是地表水的潜在污染源之一。

Our investigation and experimental results in a farm showed that the TN and TP mainly exist in the surface of the soil.The concentrations of TN and TP were 2160mg/kg and 1230mg/kg,respectively.Dissolving experimental results indicated that the acidic condition,the temperature as well as the time had obvious promoter action for the nitrogen,and phosphorus dissolving in the soil.Nitrogen and phosphorus in the soil had not remarkable influence to the ground water quality.However,in rainy days,the concentration of TN in the draining water surpassed the environment standard;the TP surpassed the environment standard 8 to 11 times, which is potentially one of the pollution sources for the surface water.