Non-exchangeable potassium release and supplying power of soils of Haryana, Northwest India

被引:1
作者
Bhat, Mohammad Amin [1 ,2 ]
Tomar, Dinesh [1 ]
Grewal, K. S. [1 ]
Sahoo, Jyotirmaya [1 ,3 ]
Dar, Eajaz Ahmad [4 ]
机构
[1] CCS Haryana Agr Univ, Dept Soil Sci, Hisar 125004, Haryana, India
[2] Punjab Agr Univ, Reg Res Stn, Ludhiana, Punjab, India
[3] ICAR Indian Agr Res Inst, Div Soil Sci & Agr Chem, New Delhi, India
[4] Sher E Kashmir Univ Agr Sci & Technol Kashmir, KVK, Ganderbal, India
关键词
K uptake; maize; non-exchangeable K; oats; oxalic acid; FERTILIZER APPLICATION; OILSEED RAPE; AVAILABILITY; KINETICS; CAPACITY; MAIZE; FORMS; EFFICIENCY; FIXATION; PLANTS;
D O I
10.1080/01904167.2023.2221683
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The management of potassium (K) necessitates the understanding of K dynamics and assessment of crop-available K reserves. Non-exchangeable K (NeK) could have a substantial impact on plant nutrition, therefore, non-exchangeable potassium release and supplying power of soils from four different soil orders of Haryana, Northwest India was examined. After successive cropping with maize and oats, initial exchangeable K contents of 0.38, 0.22, 0.25 and 0.09 cmol(p(+)) kg(-1) declined by 23.37%, 27.28%, 29.41% and 27.77% in Alfisols, Inceptisols, Entisols and Aridisols, respectively. The release of non-exchangeable K to plant roots in screen house was compared with K release to nitric, citric and oxalic acids in the laboratory to assess the feasibility of these acids for non-exchangeable K extraction. The amount of K released was quantified as cumulative uptake by maize and oats. Non-exchangeable K released to plant roots (r = 0.94; p <= 0.01) and oxalic acid (r = 0.63; p <= 0.05) were significantly correlated with cumulative K uptake. The initial level of exchangeable K (Ex-K) and cumulative K uptake by maize and oats exhibited strong and significant correlation (r = 0.85; p <= 0.05) signifying that K removal by crops results in the equilibrium among different K pools. The strongly significant relationship between non-exchangeable K released to oxalic acid and plant roots (r = 0.92; p <= 0.01) affirms the reliability of laboratory methods vis-a-vis K release studies.
引用
收藏
页码:4140 / 4155
页数:16
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