摘要
对辽中县露地和水田土壤有效氮、有效磷、有效钾养分现状进行了调查,对露地土壤有效磷、有效钾含量在1982—2010年间的变化进行了分析。结果表明,与1982年相比,全县露地土壤有效氮平均含量提高至98.96 mg/kg;土壤有效磷含量递增,平均含量由4.96mg/kg上升到11.61 mg/kg;土壤有效钾呈递减趋势,平均含量由128.08 mg/kg下降到79.90 mg/kg,平均每年降低1.34%。水田土壤有效氮、有效磷、有效钾含量随使用年限的增加呈上升趋势。
Contents of effective nitrogen,effective inphosphorus and effective potassium in open ground and the paddy field soil of Liaozhong County were investigated ,and the content changes of effective phosphorus and effective potassium in open ground soil from 1982 to 2010 were also analyzed. Result showed that：Compared to 1982, the county-wide average content of effective nitrogenous in open ground soil increased to 98.96 mg/kg; the soil effective phosphorus content increased progressively,the average content increased from 4.96 mg/kg to 11.61 mg/kg;The soil effective potassium showed the progressively decreasing tendency,the average content dropped from 128.08 mg/kg to 79.90 mg/kg,the average reduce rate was 1.34%. The contents of effective nitrogen, effective phosphorus and effective potassium in paddy field soil increased along with the service life lapsed.
出处
《现代农业科技》
2011年第14期310-311,共2页
Modern Agricultural Science and Technology
关键词
土壤
有效氮
有效磷
有效钾
变化
辽宁辽中
soil
effective nitrogen
effective phosphorus
effective potassium
changes
Liaozhong Liaoning
