%0 Journal Article
%T NPK accumulation and translocation in dryland winter wheat cultivars with different yields<br>不同产量水平旱地冬小麦品种氮磷钾养分累积与转移的差异分析
%A ZHOU Ling
%A ZHAO Hu-Bing
%A WANG Zhao-Hui
%A MENG Xiao-Yu
%A WANG Jian-Wei
%A CHEN Hui-Lin
%A LI Xiao-Han
%A <br>周玲
%A 赵护兵
%A 王朝辉
%A 孟晓瑜
%A 王建伟
%A 陈辉林
%A 李小涵
%J 中国生态农业学报
%D 2011
%I 
%X To evaluate the differences in NPK accumulation and translocation in dryland winter wheat cultivars with different yields, nine winter wheat cultivars were planted on field with no fertilizer application for six years. The results showed significant differences in NPK accumulation, translocation and K loss for different cultivars. Before anthesis, increased fertilizer rate led to more rapid increase in N accumulation in high-yield cultivars than in medium- and low-yield cultivars. At pre-anthesis, however, there were no significant differences in P accumulation among different-yield wheat cultivars. High-yield cultivars were characterized as high post-anthesis N and P accumulation and low K loss levels. This was due to high ability to save translocated K in wheat grains. Also in high-yield cultivars, N and P translocation and remobilization efficiencies, and the contribution of remobilized N and P to grain yield were lower than those in low-yield cultivars. However, there was no obvious difference in K accumulation and translocation at pre-anthesis. Consequently, higher post-anthesis N and P accumulation and lower K loss were important driving factors of higher grain yields in dryland wheat cultivars.
%K Winter wheat
%K Dryland
%K Grain yield
%K NPK accumulation and translocation
%K Pre/post-anthesis<br>冬小麦
%K 旱地
%K 产量
%K 氮磷钾累积与转移
%K 花前/花后
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=5DB1D03F14700C59FA6DB233260EE868&yid=9377ED8094509821&vid=2A8D03AD8076A2E3&iid=0B39A22176CE99FB&sid=3C6F5C97A07587AE&eid=86C0C9A759FDA8CA&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=1&reference_num=34