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Study on the Evolution Law of Potassium with Long Time Scale Climate Change in Jiangjun Loess Section of the Middle Reaches of the Jinghe River
Received date: 2015-04-15
Online published: 2016-03-08
From the perspective of application of paleoclimatology, the evolution law of potassium in soil with long time scale climate change is discussed quantitatively and the main conclusions are as follows.The relationship of the content of available potassium and slowly available potassium and the annual precipitation or the annual temperature obey the exponential function model.The fitting equations of potassium effectiveness and the annual precipitation or the annual temperature accord with the parabolic function model.There is a critical value, only the average temperature(over 9.5°C)or the annual precipitation(over 577.3mm), and its effectiveness presents obviously a progressive increase with the increase of the annual precipitation or the annual temperature.The fitting relationship of the content of available potassium and slowly available potassium, potassium effectiveness and paleoclimatic coupling conditions comply with the Cobd-Douglas equations.
Li-jie WU, Juan YU, Jian-sheng SHI, Cheng-min WANG, Zhi-wei BI, Jiao GUO . Study on the Evolution Law of Potassium with Long Time Scale Climate Change in Jiangjun Loess Section of the Middle Reaches of the Jinghe River[J]. Journal of Shanghai Jiaotong University (Agricultural Sciences), 2016 , 34(1) : 69 -73 . DOI: 10.3969/J.ISSN.1671-9964.2016.01.012
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