水土保持学报2012，Vol.26Issue(3)：141-144,179,5.
黄河三角洲引黄灌区不同植被类型的降盐改土功能
Function of Reducing Soil Salinity and Soil Improvement of Different Vegetation Types in Yellow River Irrigation Area of the Yellow River Delta
摘要
Abstract
Compared with bare land,characteristics of soil pH value,soil salt content,soil density and porosity,soil nutrients and soil respiration of forest of Fraxinus chinensis,cotton field and grassland vegetations were researched in Xiaokaihe Yellow River diversion irrigation district of the Yellow River delta.Results indicated that： ①Different vegetation types had obvious function of controlling soil salinity content beside the channel.Compared with bare land,the soil salinity content of cotton field,forest of F.chinensis and grassland decreased by 66.7%,52.4%,16.7%,respectively,and the index of 0-20 cm was less than that of 20-40 cm.②Soil density decreased,and soil total porosity increased with different vegetation types.Soil density showed this order： F.chinensis forest 〈grassland 〈cotton field 〈bare land.However,soil total porosity showed a contrary tendency,and these indexes of 0-20 cm were better than that of 20-40 cm.③Soil organic matter and available N,P,K were mostly increased in different type of vegetations.Soil organic matter of F.chinensis,cotton field,and grassland was 2.72,2.03,1.75 times respectively,larger than that of bare land,and these indexes of 0-20 cm were higher than that of 20-40 cm.④There was a significant increase for diurnal soil respiration rate after vegetation restoration in bare land.The significant diurnal variation of soil respiration in different types of vegetations and bare land showed a single-peaked curve,and the average and daily variation amplitude of soil respiration rate showed this order： F.chinensis forest 〉cotton field 〉grassland 〉bare land.The average soil respiration rate of F.chinensis forest,cotton field,grassland was 8.01,6.47,3.36 times respectively,larger than that of bare land.关键词
黄河三角洲/引黄灌区/植被类型/土壤呼吸速率/土壤理化性状Key words
Yellow River delta/Yellow River irrigation area/vegetation types/soil respiration rate/soil physics-chemistry property分类
农业科技引用本文复制引用
王晓芳,夏江宝..黄河三角洲引黄灌区不同植被类型的降盐改土功能[J].水土保持学报,2012,26(3):141-144,179,5.基金项目
国家“十一五”科技支撑计划项目 （）
山东省黄河三角洲生态环境重点实验室开放基金项目 （）
服务滨州科学发展行动计划立项项目 （）
