Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Exchangeable Characteristics of Potassium in Five Important Soils of Taiwan
The application of potassium fertilizer by farmers is often not appropriate and causing environmental pollution. By understanding the adsorptive characteristics of potassium (K) on different soils, we can prevent excessive application of K‐fertilizer that can cause environmental impact. The Gapon exchange coefficient (KG), for exchange between K and Ca, was considered as an important factor influencing the adsorption of K. This study was conducted to compare the constant KG of five important farm soils in Taiwan. The KG and CEC were then used to predict K buffering capacity (PBC). Finally, the relationship between exchangeable K ratio (EP) and K adsorption ratio (PAR) was examined. The results show that five soils have same trends, indicating that KG decreases with increase in K saturation. The CEC and KG of Liuying (Ly) soil are both high, so that their K buffering capacity is high. The KG and CEC of Chanjing (Cj) and Sanhua (Sh) soil show moderate values. The CEC of Erling (El) soil is high, but its KG is low, so that its K buffering capacity is moderate. On the other hand, the KG of Newniaokang (Nnk) soil is high but its CEC is low, so its K buffering capacity is also moderate. The correlations between EP and PAR of five soil show linear relationship at three treatments of CaCl2 concentration. This study may provide an important clue to the fertilization management of K‐fertilizer on the different soil properties in Taiwan.
Exchangeable Characteristics of Potassium in Five Important Soils of Taiwan
The application of potassium fertilizer by farmers is often not appropriate and causing environmental pollution. By understanding the adsorptive characteristics of potassium (K) on different soils, we can prevent excessive application of K‐fertilizer that can cause environmental impact. The Gapon exchange coefficient (KG), for exchange between K and Ca, was considered as an important factor influencing the adsorption of K. This study was conducted to compare the constant KG of five important farm soils in Taiwan. The KG and CEC were then used to predict K buffering capacity (PBC). Finally, the relationship between exchangeable K ratio (EP) and K adsorption ratio (PAR) was examined. The results show that five soils have same trends, indicating that KG decreases with increase in K saturation. The CEC and KG of Liuying (Ly) soil are both high, so that their K buffering capacity is high. The KG and CEC of Chanjing (Cj) and Sanhua (Sh) soil show moderate values. The CEC of Erling (El) soil is high, but its KG is low, so that its K buffering capacity is moderate. On the other hand, the KG of Newniaokang (Nnk) soil is high but its CEC is low, so its K buffering capacity is also moderate. The correlations between EP and PAR of five soil show linear relationship at three treatments of CaCl2 concentration. This study may provide an important clue to the fertilization management of K‐fertilizer on the different soil properties in Taiwan.
Exchangeable Characteristics of Potassium in Five Important Soils of Taiwan
Lin, Yong‐Hong (Autor:in)
CLEAN – Soil, Air, Water ; 38 ; 1111-1115
01.12.2010
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
K‐Fertilizer , Modeling , Soil
Exchangeable Characteristics of Potassium in Five Important Soils of Taiwan
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