结果表明，风沙土钾素含量较低，土壤速效钾含量及被土壤固定的钾量均随着施钾量的提高而增加。
The result shows that the content of slow-release potassium and available potassium is low. Theamount of available potassium and fixed potassium increase with increasing amount of applied potash.
SOC含量相对更低的灰棕漠土比风沙土退耕后土壤C、N的增加更为明显。
Typic Calciorthids with lower SOC concentration had relatively lower C sequestration rate but more significant effects of C and N sequestration compared with Typic Torripsamments.
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