黔西北不同利用类型土壤全磷及有效磷的分布与残留

发布时间：2018-06-12 20:59

本文选题：土地利用类型 + 全磷　；参考：《河南农业科学》2017年07期

【摘要】：在黔西北关门山小流域选取5种主要的土地利用类型,研究不同土地利用类型下土壤全磷及有效磷的分布与残留特征,以期为当地生态环境保护和科学施磷提供一定的理论依据。结果表明,灌木林地坡面表层土壤全磷含量总体高于乔木林地,有效磷含量无明显分布规律。在坡顶、坡中和坡脚3个位置,乔木林地和灌木林地土壤剖面全磷和有效磷含量总体均随着土层深度的增加而减小,以表层最高,坡中和坡脚处0~60 cm土层全磷含量高于坡顶;乔木林地坡中和坡顶处土壤剖面全磷分别在80~100 cm和60~80 cm土层附近出现累积现象,但坡脚没有。5种利用类型土壤剖面全磷和有效磷含量均以表层最高,随着土层深度增加总体呈降低趋势,果园土壤剖面全磷含量远高于其他土地利用类型;表层土壤有效磷含量以玉米地最高,乔木林地最低。在0~80 cm土层中,乔木林全磷残留量最低,仅为1 783.7 kg/hm~2,果园全磷残留量最高,达3 416.0 kg/hm~2,显著高于其他土地利用类型;有效磷残留量以灌木林地最低,撂荒地最高,但不同土地利用类型间差异不显著。
[Abstract]:Five main land use types were selected in Guanmenshan small watershed of northwest Guizhou to study the distribution and residual characteristics of soil total phosphorus and available phosphorus under different land use types. In order to provide certain theoretical basis for local ecological environment protection and scientific phosphorus application. The results showed that the total phosphorus content in the topsoil on the slope was higher than that in the Arbor forest land, and there was no obvious distribution of available phosphorus content. The total phosphorus and available phosphorus contents in soil profile of Arbor woodland and shrub land decreased with the increase of soil depth at the top of the slope, and the total phosphorus content in the soil layer of 0 ~ 60 cm at the bottom of the slope was higher than that in the top of the slope. The accumulation of total phosphorus in the soil profile was found in the soil layer of 80 ~ 100 cm and 6080 cm, respectively, but there were no 5 types of utilization types in the foot of the slope. The total phosphorus and available phosphorus contents in the soil profile were the highest in the surface layer. With the increase of soil depth, the total phosphorus content in soil profile of orchard was much higher than that in other land use types, and the available phosphorus content in surface soil was the highest in cornfield and the lowest in Arbor forest land. In the 0 ~ (80 cm) soil layer, the total phosphorus residue in Arbor forest was the lowest, only 1 783.7 kg / hm ~ (-2), and the total phosphorus residue in orchard was the highest (3 416.0 kg / hm ~ (2), which was significantly higher than that in other land use types, and the effective phosphorus residue was the lowest in shrub land and the highest in abandoned land. However, there were no significant differences among different land use types.
【作者单位】：贵州工程应用技术学院生态工程学院;
【基金】：贵州省教育厅自然科学研究项目青年项目(黔教合KY字[2014]325);贵州省教育厅产学研合作示范基地建设项目[黔教合KY字(2013)131] 毕节学院高层次人才科学研究项目(院科合字G2012010) 毕节市生态学重点学科人才团队项目
【分类号】：S153.6

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