The Potassium Fixed and Effect on Cotton of Depletion Soil

doi:10.3321/j.issn:1000-7091.2003.01.026

Abstract

Abstract: The change of soil potas sium was s tudied by indoor simulation and bio-depletion methods. The study showed that humid soil may reduce soi-l fixed potassium from potassium fertilizer. Inundated soil reduced the fixed potas sium by 2-29 mg/ kg than that of soil containing 20% water.The soil potassium fixation was increased after dry and humid alternation. Soil with higher potassium content had a higher fixation ability. Eighty percent of the potassium taken up by cotton was from non-exchangeable potas sium of the soil. Both the pot and the field experiment showed a same result that the c ontent of soi l non-exchangeable potassium will no longer decrease when it reached a certain level, while non-extractable potassium with 1 mol / L HNO₃will continue to decline.

Key words: Depletion soil, Fixed potassium, Cotton

CLC Number:

S158.3

GUO Jian hua, HAN Bao wen, XING Zhu. The Potassium Fixed and Effect on Cotton of Depletion Soil[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2003, 18(1): 94-96. doi: 10.3321/j.issn:1000-7091.2003.01.026.

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