YI Yan,YI Yan-li.Study on the Feature of Acidity Change in Brown Soils of Changtu County[J].HEILONGJIANG AGRICULTURAL SCIENCES,2011,(09):25-29.
昌图县耕地棕壤酸度变化特征的初步研究
- Title:
- Study on the Feature of Acidity Change in Brown Soils of Changtu County
- 文章编号:
- 1002-2767（2011）09-0025-05
- Keywords:
- cultivated brown soil; soil acidity; distribution characteristic; change trend; correlation
- 分类号:
- S153.4
- 文献标志码:
- A
- 摘要:
- 昌图县位于辽宁省铁岭市北部，是辽宁省的产粮大县之一。通过对大田调查采样与室内分析相结合的方法，研究了昌图县耕地土壤酸度变化特征。结果表明：昌图县耕地土壤类型以棕壤为主，此外还有少量的风沙土和草甸土。在3 750个3种类型土壤土样中，pH＜5.0（强酸性）和pH 5.0~6.5（酸性）的土样占总调查土样的75.68%。中性土样占16.56%；其中棕壤酸化程度最大，pH＜5.0（强酸性）和pH 5.0~6.5（酸性）的土样分别占总调查土样的1.17%、87.28%。与第二次土壤普查相比，各乡镇土壤pH均有所下降，其下降值为0.16~1.43个单位。实验数据分析得出：土壤pH与土壤阳离子交换量和盐基饱和度呈正相关关系；与土壤交换性酸（交换性H+和交换性Al3+）呈负相关关系。
- Abstract:
- Changtu county locates in the north of Tieling.It is one of the major grain-producing counties in Liaoning province.Using the method of combining the field investigation and analysis indoor,the feature of acidity change in soils of Changtu county was studied.The results showed that besides a small amount of sand soil and meadows soil,soils of Changtu were mainly brown soil.The proportion of the three types of soil which pH＜5.0(strongly acidic） and pH 5.0~6.5(acid） accounted for 75.68% of the 3 750 survey soil samples,the neutral soil accounted for 16.56%.Brown soil’s acidification degree was the largest.The soil samples of the pH＜5.0(strongly acidic） and pH 5.0~6.5(acid） accounted for 1.17% and 87.28%,respectively.Compared with the second soil census,the soil pH of the towns all decline between 0.16~0.13.The results showed that the soil pH had positive correlations with CEC and BS and negative correlations with exchanged acid(exchanged H+and exchanged Al3+）.
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备注/Memo
第一作者简介：依妍(1985-），女，辽宁省沈阳市人，在读硕士，从事土壤酸化方面研究。E-mail:woshigege_@126.com.