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林业资源管理 ›› 2021›› Issue (4): 114-120.doi: 10.13466/j.cnki.lyzygl.2021.04.015

• 科学研究 • 上一篇    下一篇

陇中半干旱黄土丘陵区土壤养分空间分布特征

柴春山(), 王子婷, 张洋东, 戚建莉   

  1. 甘肃省林业科学研究院,兰州 730020
  • 收稿日期:2021-06-11 修回日期:2021-07-07 出版日期:2021-08-28 发布日期:2021-09-26
  • 作者简介:柴春山(1976-),女,青海互助人,副研究员,硕士,主要从事林木栽培技术研究。Email: 163chaics@163.com
  • 基金资助:
    甘肃省重点研发计划项目“陇中黄土区黑果枸杞引种及栽植利用研究”(20YF3FA010);国家自然科学基金项目“陇中黄土丘陵沟壑区小流域生态经济系统演变特征及驱动机制”(41561112)

Spatial Distribution Characteristics of Soil Nutrients in Semi-Arid Loess Hilly Area of Longzhong

CHAI Chunshan(), WANG Ziting, ZHANG Yangdong, QI Jianli   

  1. Gansu Academy of Forestry Science,Lanzhou 730020,China
  • Received:2021-06-11 Revised:2021-07-07 Online:2021-08-28 Published:2021-09-26

摘要:

为给半干旱黄土区的植被恢复与重建提供土壤养分的科学依据,对甘肃省陇中黄土丘陵区不同流域(龙滩、安家坡、窎沟)和不同土地利用类型(农田、撂荒地、草地、林地)的土壤养分进行了测定和分析。方差分析表明,土壤养分含量在3个流域间除全钾外差异均不显著(P>0.05),但在不同土地利用类型间差异均显著(P<0.05);在农田和撂荒地的不同坡向间差异均不显著(P>0.05),林地的不同植被类型间也均不显著(P>0.05),但在草地的不同植被类型间差异显著(P<0.05)。变异分析表明,不同流域间养分变异差异不大但不同土地利用类型间差异较大。相关性分析表明,土壤养分与养分间有显著的相关性(P<0.05)。综合分析认为,在半干旱黄土丘陵区,流域空间位置对土壤养分含量和分布没有明显影响,但土地利用类型对其含量和分布影响大,同一土地利用类型下坡向对土壤养分含量及分布也没有明显的影响,但植被类型对其含量及分布有一定影响,农田转变为林草地有利于土壤养分恢复。

关键词: 半干旱黄土区, 土地利用类型, 植被类型, 土壤养分, 养分分布

Abstract:

In order to provide scientific referencess for vegetation restoration and reconstruction in semi-arid loess area,the soil nutrients were measured and analyzed in 4 typical land use types(cropland,abandoned cropland,grassland,forestland) and 3 watersheds(Anjiagou,Longtan,Diaogou) in loess hilly area of Longzhong,Gansu Province.Variance analysis indicated that the soil nutrient content had no significant differences(P>0.05) among three watersheds except for total K,but had significant differences among different land use types(P<0.05);there were no significant differences(P>0.05) in soil nutrients between different slope aspects for cropland and abandoned cropland,also there were no significant differences(P>0.05) between different vegetations of forestland,but there were significant differences(P<0.05) between different vegetations of grassland.Variation analysis showed that there were small differences in nutrient variation among different watersheds,but great differences among different land use types.Correlation analysis showed that there was significant correlation among soil nutrients(P<0.05). The comprehensive analysis showed that in semi-arid loess hilly area,the geographical location of the watershed had no obvious influence on the content and distribution of soil nutrients,but the land use type had a great influence on the content and distribution of soil nutrients.Under the same land use type,slope aspect had no obvious influence on soil nutrient content and distribution,but the vegetation type had certain influence on soil nutrient content and distribution.The conversion of cropland to forestland and grassland was beneficial to the recovery of soil nutrients.

Key words: semi-arid loess area, land use type, vegetation type, soil nutrient, distribution of soil nutrient

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