%0 Journal Article
%T Study on the potassium characteristic of rendzina soil in the sub-tropic Karst of Guangxi<br>广西亚热带岩溶地区石灰性土壤钾素特征研究
%A TAN Hong-Wei
%A ZHOU Liu-Qia ng
%A XIE Ru-Lin
%A HUANG Mei-Fu
%A <br>谭宏伟
%A 周柳强
%A 谢如林
%A 黄美福
%J 中国生态农业学报
%D 2006
%I 
%X The potassium characteristic of rendzina soil in the sub-tropic Karst of Guangxi was studied. The results show that the soil available potassium content and available potassium release amount can reflect the soil supply potassium capacity for a season crop in the agro-ecological system of sub-tropic Karst. When the soil availble potassium content is 30 -- 32 mg/kg, the crop is very difficult to absorb potassium and the growth is limited seriously. The main nutrient-limited factor of soil is potassium. Phosphorus, surphur, boron and zinc are not enough for crop growth. Slow potassium content and slow release potassium content can not show the soil supply potassium capacity, but they can show the soil sustainable supply potassium capacity. Applying potassium fertilizer is good for the balance of potassium in soil and can increase the crop yield.
%K Sub-tropic Karst region
%K Agro-ecological system
%K Soil potassium<br>亚热带岩溶地区
%K 农田生态系统
%K 土壤K素
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=80C27B49318CD397&yid=37904DC365DD7266&vid=F3583C8E78166B9E&iid=38B194292C032A66&sid=9FFCC7AF50CAEBF7&eid=BFE7933E5EEA150D&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=3&reference_num=4