摘要
通过室内土柱模拟降雨实验,在三种降雨强度及两种施肥量作用下,分别测定土壤及土壤溶液中TN、TP及有机质的含量,探讨降雨强度及施肥量对水源区中药材种植氮磷污染物迁移的影响。结果表明,随着降雨强度的增大,TN、TP由土壤表面层次流向深层次的趋势不断增大,氮磷流失量增加;随着氮、磷肥料施加量的增加,土壤及土壤溶液TN、TP都有增加,氮磷流失量随之增大;一次施肥量过高容易造成肥料堆积土壤表层,氮磷流失量明显增大,少量多次施肥能使肥料利用率提高。
Under the action of three kinds of rainfall intensity and two kinds of fertilizer rate, this study demines TN, TP and organic matter content in the soil and soil solution through indoor soil column rainfall simulation, in order to explore the effects of rainfall intensity and fertilizer rate to nitrogen and phosphorus pollutants migration in some Chinese herbal medicine planting. The results showed that with the increase of rainfall intensity, the trend of TN, TP from thd soil surface layer to deep was increasing, and nitrogen and phosphorus was losing. With the increase of nitrogen and phosphorus fertilizer applied amount, TN and TP of soil and soil solution had increased, the loss of nitrogen and phosphorus also increased. Once excessive fertilization is likely to cause the accumulation of topsoil fertilizer, and the loss of nitrogen and phosphorus significantly increased.
出处
《环境科学与管理》
CAS
2015年第4期53-57,共5页
Environmental Science and Management
基金
国家水体污染控制与治理科技重大专项(2012ZX07205-002)
关键词
中药材种植
氮
磷
污染特征
模拟研究
Chinese herbal medicine planting
nitrogen
phosphorus
pollution characteristics
simulation study
