摘要
利用在山西省采集的75个典型农田剖面数据,系统分析了山西省农田土壤速效养分状况与分布规律,研究结果表明,2007年山西省主要农田耕层土壤速效磷、速效钾和碱解氮平均含量为14.15,141.80,63.29 mg/kg,山西省整体速效磷和速效钾含量较丰富,碱解氮含量处于中等水平。不同的速效养分空间分布格局不同,土壤速效磷具有从南向北、从西北至东南逐渐降低的趋势;土壤速效钾分布总体呈现从南向北降低的趋势;土壤碱解氮则呈现自东南向西北、自南向北依次降低的趋势。农田土壤速效养分的空间分布特征为农田管理提供了理论依据。
Using the data of 75 typical profiles,we analyzed the status and distribution of farmland soil active nutrients in Shanxi province.The mean contents of soil available P,K and alkali-hydrolyzed nitrogen at 0～20 cm soil depths of typical cropland were 14.15,141.80 and 63.29 mg/kg respectively.It is summarized that the study areas were generally high of soil active P and K,with moderate alkali-hydrolyzed N contents.The content of active P presented a gradual reduction trend from the south to the north and from northwest to southeast.The active potassium content in the south was higher than that in the north.The content of alkali-hydrolyzed N in the southeast was the highest.The spatial distribution characteristic of soil active nutrients provided a theoretical basis for farmland management in Shanxi province.
出处
《山西农业科学》
2011年第10期1083-1087,共5页
Journal of Shanxi Agricultural Sciences
基金
山西省青年科技研究基金项目(2009021033)
中国科学院知识创新项目(kzcxz-yw-312)
关键词
土壤速效养分
空间分布
农田
山西
soil active nutrient status
spatial distribution
farmland
Shanxi province
