Effects of Long-term Fertilization on Potassium Fixation Capacity in Brown Soil

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Li, Na^1,2 ; Guo, Chunlei^1,2 ; Wang, Yue^1,2 ; Gao, Tianyi^1,2 ; Yang, Jinfeng^1,2 ; Han, Xiaori^1,2

College of Land and Environment, Shenyang Agricultural University, Shenyang

110866, China^1

Min. of Agric. Sci. Experimental Station of Maize Nutrition and Fertilization in Northeast China, Shenyang

110866, China^2

关键词: Fertilizer applications;    Fixation rates;    Long-term experiments;    Long-term fertilization;    Organic fertilizers;    Reduced soils;    Soil fertility;    Theoretical foundations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/3/032036/pdf
DOI  :  10.1088/1755-1315/108/3/032036

来源: IOP

【 摘 要 】

This study concentrated on the research of features of fixation. The objective of this study was to provide theoretical foundation of rational application of potassium fertilizer along with improving fertilizer availability ratio. A 32 years long-term experiment was conducted to evaluate the effects of fertilizer application on potassium changes and the factors affecting K fixation on brown soil by simulation in laboratory. When the concentration of exogenous potassium was in range of 400∼4000 mg•kg-1, potassium fixation capacity increased along with the rise of concentration of exogenous potassium, whereas K fixation rate reduced; Compared with no-potassium fertilizer, application of potassium fertilizer and organic fertilizer reduced soil potassium fixation capacity. Potassium rate and fixation-release of potassium character in soil should be taken into comprehensive consideration for rational fertilization to maintain or improve soil fertility for increasing potassium fertilizers efficiency in agriculture.