摘要
本文综述了土壤有效钾的提取方法,并根据不同浸提方法的测定结果与作物反应与标准方法之间的相关性进行了评价。结果表明有多种方法与参比项有显著的相关性。并推荐单独提取土壤有效钾时用1moL·l-1中性NH4OAC法,也可用CEM法或2moL·l-1冷HNO3法,同时需要提取其他有效养分时可用ASI法或M-3法。个别土壤还可用其他方法。但在石灰性土壤上不能用Bray-1法和M-1法。
The different extraction method of available K was described in this paper according to the correlation of the method and the response of crop or standard method The results indicated that many methods have significante correlation with the reference item The method of 1mol·l-1 neutral NH4OAC and 2mol·l-1HNO3,CEM can be used when only measure available K The method of ASI and M-3 can be used when measure available K and other nutrients Other method can also be used on some soils But Bray-1 and M-1 can't be used on calcareous soil
出处
《土壤肥料》
CSCD
北大核心
2003年第6期3-7,共5页
Soils and Fertilizers
基金
河北省科委"九五"攻关项目(96220913D)
