质地对土壤物理性质的影响及调节研究

Effect of soil texture on soil physical properties and regulations

以耕地棕壤为试验材料,采用室内培养的方法研究了外源砂不同添加量对土壤物理性质的影响,并进一步研究了添加有机质对不同含砂量土壤物理性质的调节作用。结果表明：与对照（含砂量31.51%）比,随土壤含砂量的增加,容重增加了2%-15%,持水量降低了1%-11%。在不同含砂量的条件下,添加有机质的土壤容重比对照降低10%左右,土壤含砂量在30%-70%时,添加有机质处理能明显提高土壤的持水能力,当含砂量超过70%时,添加有机质处理对土壤持水能力影响不大,随有机质添加量增加土壤氧化还原电位下降。

Taking tillage brown soil as experimental material,and using the method of indoor incubation experiment,we studied effects of sand content on soil basic physical properties and the regulations of organic matter on it. the results showed that with the content of soil sand increased to C K（ sand content 31. 51%）,soil bulk density increased by 2% - 15%,and soil water capacity was reduced than the control by 1% - 11%. Organic matter could reduce soil bulk density by 10% than the control. As sand content in the range of 30% - 70%,adding organic matter could better keep soil moisture,but it would be not obvious when sand content more than 70%. REDOX potential would go down with the adding amount of organic matter.