摘要
2008年石家庄市土壤养分调查表明,全区耕层土壤养分含量整体处于中等水平,与第二次土壤普查结果比,速效钾含量呈下降趋势,化肥投入结构不合理、钾的投入不足,是造成土壤速效钾含量下降的主要原因。
The soil nutrient survey of Shijiazhuang City in 2008 showed that the soil nutrient contents were overall in the medium level,compared with the second soil survey result,available potassium content declined,and the main reasons caused the decline were deficiency of fertilizer inputs,unreasonable structure,insufficient investment of K.
出处
《现代农业科技》
2011年第9期293-294,共2页
Modern Agricultural Science and Technology
关键词
耕层土壤
速效钾
变化
河北石家庄
topsoil
avilable potassium
change
Shijiazhuang Hebei
