摘要
采用野外调查与试验分析相结合的方法,对大庆市五区四县不同利用方式土壤全盐量、阴离子组成、pH值、总碱度、交换性Na+和碱化度等指标进行了研究,并运用主成分分析对不同利用方式土壤的盐碱化进行综合评价。结果表明:全盐量和阴离子在不同土地利用方式中排序基本一致为,未利用地>草地>工业用地>水田>旱田,且阴离子含量随全盐量的增加而增加。土壤碱化度含量差异较大,且与交换性Na+呈显著正相关。土壤pH值和总碱度的变化趋势一致,即土壤总碱度愈大,pH值愈大,但不呈现比例关系。pH值与交换性Na+、CO23-和HCO3-呈显著正相关。不同利用方式盐碱化程度评价结果为:工业用地、未利用地和草地盐碱化程度均显著大于旱田和水田。
Based on the field investigation and experimental analysis,mechanical composition,organic matter,total nitrogen,total phosphorus,total potassium,total salt content,anion composition,pH value,total alkalinity,cation exchange capacity,exchangeable sodium,degree of alkalization of various land-use types of soil in Daqing city are systematically studied.Comprehensive evaluation on salinization was conducted by principal composition analysis.The results showed： The content of the total salt and the anion in soil of different land-use types had a same ranking like this： unutilized land,grassland,industrial land,paddy,upland.The anion content increased with increase of the total salt content.The content of the exchangeable sodium in soil was positively correlated with the content of the exchangeable sodium percentage（ESP）.The soil pH value was increased with the increase of the total alkalinity,but they were not directly proportional with each other.There were significant positive correlations among soil pH value and exchangeable sodium,carbonate,bicarbonate.Principal component analysis indicated that in different land-use,the soil alkalization degree in industrial land,unutilized land and in grassland were greater than upland field and paddy field.
出处
《水土保持学报》
CSCD
北大核心
2011年第1期171-175,179,共6页
Journal of Soil and Water Conservation
基金
黑龙江省"十一五"重大科技攻关项目(GA06B302-2)
国家自然科学基金(30970481)
关键词
土地利用方式
盐碱化
评价
大庆市
different land-use types of soils
salinization
evaluation
Daqing
