Abstract：The determination of soil available potassium and exchangeable calcium and magnesium is an important content of formula fertilization and farmland fertility evaluation, it plays a vital role in the development of soil comprehensive productive capacity. In order to determine the available potassium, exchangeable calcium and exchangeable magnesium in soil samples accurately and rapidly, the icp-aes method was used in this paper, the precision, reliability and stability are good, and the detection limit is low. In this paper, the optimum pre-treatment method of quick-acting potassium and exchangeable calcium-magnesium was studied by orthogonal experiment: constant temperature agitation extraction, extraction temperature 30 ℃, extraction time 120 min, the ratio of soil sample to ammonium acetate extraction solution 1∶30, a satisfactory result can be obtained.
赵卓玲. ICP-OES光谱法测试土壤速效钾及交换性钙镁[J]. 煤炭与化工, 2023, 46(8): 140-143，160..
Zhao zhuoling. Soil available potassium and exchangeable calcium and magnesium were measured by ICP-OES. CCI, 2023, 46(8): 140-143，160..
