Abstract:

In order to make clear the potassium condition of high yield soil of the corn belt of the Songliao plain, and improving food production. Selected different profile soil in located in Lishu County and Shengli Country, Quanyan Mountain of the Jilin Province, and Yongfa Township of Gongzhuling City as the tested soil. Determined by analyzing the content of total potassium, available potassium and slowly available potassium to realize potassium status and potential potassium status of the tested soil. The adsorption character of the tested soil was fitting to freundlich equation. High yield soil of the corn belt of the Songliao plain contained rich potassium; total potassium and slowly available potassium content were higher and available potassium content were moderate; the potassium adsorption strength of high yield soil significantly greater than its reference soil; 0.7341 ≤ 1/n ≤ 0.9575; the bound force to the potassium ion of high yield soil was weaker and be beneficial to plant absorption and utilization. The desorption rate to the adsorption potassium between high yield soil and contrast soil had greater differences. Following increased concentration of potassium in join liquid, the difference became smaller; when potassium concentration was more than 0.56 g/L, the desorption rate was close to the same.