温度对土壤钾素容量和强度(Q/I)关系的影响

TEMPERATURE EFFECTS ON QUANTITY AND INTENSITY (Q/I) RELATIONSHIP OF POTASSIUM IN SELECTED SOILS

本文研究了温度对土壤钾素容量和强度(Q/I)关系的影响。在5,25和40℃三种温度下测定了新疆灰漠土、吉林暗棕壤和山东棕壤三种土壤样本的Q/I关系曲线。结果表明,随着温度的升高,土壤供钾能力增加,缓冲性能下降,供钾强度指标AR°值和供钾容量指标△K°值增加,表示土壤对钾的缓冲性能的PBC值减小。温度对AR°值的影响最为明显,当温度从5℃增加到40℃时,新疆灰漠土、吉林暗棕壤和山东棕壤的AR°值分别从0.0167,0.00074和0.0010增加到0.0348,0.0015和0.0014 mol·L^(-1)^(1/2)。

Quantity and intensity (Q/I) relationship of potassium (K) in three soils, a gray desert soil from Xinjiang, a dark brown earth from Jiling and a brown earth from Shandong, were determined at 5, 25 and 40℃ to investigate the effect of temperature on K supplying power of the soils. With the increase of temperature, the AR°and △K° values increased, while the PBC value decreased. When temperature increased from 5℃ to 40℃, the AR° avlues of the gray desert soil, the dark brown earth and the brown earth increased from 0.0167, 0.00074 and 0.0010 to 0.0348, 0.0015and 0.0014 (mol L^(-1))^(1/2), respectively.