摘要
采用野外调查取样和室内分析相结合的方法,分析3种不同土地利用方式对黄河三角洲河口区盐碱地土壤理化性质的影响。结果表明:1)刺槐林地土壤表层0～10 cm有机质和全氮质量分数均最高,分别为17.30和1.04g/kg,0～20 cm平均土壤密度(1.33 g/cm3)和0～100 cm平均土壤电导率(290.25μs/cm)均小于柽柳林地和棉花地,0～20 cm平均土壤孔隙度(51.91%)和黏粒质量含量(3.99%)均大于柽柳林地和棉花地;2)柽柳林地0～100cm平均土壤pH值为6.77,极显著低于刺槐林地和棉花地(P<0.01),平均土壤速效钾质量分数最高(104.47 mg/kg),极显著高于棉花地(P<0.01),而与刺槐林地差异不显著,0～100 cm平均土壤速效磷质量分数为棉花地>柽柳林地>刺槐林地;3)人工栽植的刺槐林地土壤理化性状优于天然更新的柽柳林地和人工耕作的棉花地。研究结果可为黄河三角洲河口区盐碱地土地合理利用和改良提供参考。
The effects of different land use modes on physical and chemical properties of the saline-alkali soil in Yellow River delta were analyzed by field soil sampling and laboratory experiment. The results showed that： 1 ）the organic matter and total nitrogen quality content in the profile of 0 -10 cm of Robina pseudoacacia forest land were the highest, 17.30 and 1.04 g/kg respectively. The average soil density in 0-20 cm （1.33 g/cm^3） and conductivity in 0 - 100 cm （290.25 I^s/cm） were less than those of Tamarisk chinensis Lour. forest land and Gossypium hirsutum L. land. The porosity （51.91%） and clay partical quality content （3.99%） in 0 -20 cm were higher than those of Tamarisk chinensis Lour. forest land and Gossypium hirsutum L. land. 2 ） The pH value was 6.77 in 0 - 100 cm of Tamarisk chinensis Lour. forest, significantly lower than that of Robina pseudoacacia forest land and Gossypium hirsutum L.land （P 〈 0.01 ）. The available potassium quality content in 0 - 100 cm of Tamarisk chinensis Lour. forest land was the highest（ 104.47 mg/kg）, significantly higher than that of Gossypium hirsutum L. land （P 〈 0.01 ）. There was no significant difference between Tamarisk chinensis Lour. forest land and Robina pseudoacacia forest land. The average available phosphorus quality content in 0 - 100 cm was Gossypium hirsutum L. land 〉 Tamarisk chinensis Lour. forest land 〉 Robina pseudoacacia forest land. 3 ）The physical and chemical properties of the artificial Robina pseudoacacia forest land were better than those of natural regenerating Tamarisk chinensis Lour. forest land and artificial cultivated Gossypium hirsutum L. land. The results could provide reference for the reasonable use and improvement saline-alkali land of Hekou County in Yellow River Delta.
出处
《中国水土保持科学》
CSCD
2013年第2期84-89,共6页
Science of Soil and Water Conservation
基金
世界银行贷款项目“山东省生态造林项目生态效益监测与评估”(SEAP-JC-2)
山东博士后科学基金“黄河三角州苜蓿草地土壤碳氮固存耦合特征及碳增汇途径研究”(201003028)
关键词
盐碱地
土地利用方式
土壤养分
土壤密度
黄河三角洲
saline-alkaline soil
land use modes
soil nutrients
soil density
Yellow River Delta
