摘要
通过田间定位试验,研究了不同施肥条件下作物吸收与土壤速效钾动态的关系。研究结果表明:作物对土壤钾素的吸收量随施钾量的增加而增加,土壤速效钾在小麦-玉米轮作周期内呈现出"M"型动态变化。土壤速效钾的这种动态变化是作物吸收、施肥、气候等多种因素共同作用的结果。施用钾肥可以提高轮作周期内的土壤供钾能力,减轻土壤钾素消耗。
This article researches the relationship between the crop absorption and the available potassium dynamic under different potash application by long term location experiment using system method.The result indicates that the potassium absorption by crops increases with the increment of potassium fertilizer application.The available potassium presents an ＂M-shape＂ dynamic in the wheat-maize rotation life-cycle.The above potassium dynamics are attributed to the collaboration of many factors such as crop absorption,fertilizer,climate and so on.Potassium fertilizer application increases the potassium supplying power and decreases the potassium consumption of soil.
出处
《土壤通报》
CAS
CSCD
北大核心
2010年第6期1440-1443,共4页
Chinese Journal of Soil Science
基金
国家重点基础研究发展规划项目(2005CB121107)资助
关键词
土壤速效钾
作物吸收
轮作
Available potassium in soil
Crop absorption
Rotation
