%0 Journal Article
%T Study on Difference of Potassium Fixation Capacity of Soils in Northern and Northwestern Regions of China<br>华北与西北地区典型土壤固钾能力差异研究
%A TAN De-shui
%A JIN Ji-yun
%A HUANG Shao-wen
%A LIU Zhao-hui
%A JIANG Li-hua
%A <br>谭德水
%A 金继运
%A 黄绍文
%A 刘兆辉
%A 江丽华
%J 土壤
%D 2009
%I 
%X Experiments were conducted to study the difference of potassium fixation capacity of soils under 13 year application of K fertilizer and wheat straw return in the northwestern region and northern region of China. The results showed that continuous application of K fertilizer and wheat straw return could reduce fixation rate of added K significantly compared with NP treatment. With the increase of K concentration in the surrounding solution, K fixation capacity of soils increased but the percentage of the total K in the solution fixed by soils reduced. K fixation rate in subsoil layer (20 ~ 40 cm) was greater than that in the top layer soil (0 ~ 20 cm), and it was more obvious in the northern region. K fixation rate by soils under double cropping region was higher than original soil but contrary under sole cropping region. K fixation capacity increased from the northwestern region to the northern region.
%K Northern and northwestern regions
%K Representative soils
%K K fixation capacity<br>西北华北地区
%K 典型土壤
%K 固钾能力
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=56F69E970C6E5190CDB409D28DD0E3C6&aid=CF7AD4E66D0202C7B00AAE8CA6A1D309&yid=DE12191FBD62783C&vid=2001E0D53B7B80EC&iid=38B194292C032A66&sid=A53D7AA35F9929AF&eid=216EFB25F7F834CC&journal_id=0253-9829&journal_name=土壤&referenced_num=1&reference_num=15