Soil Quality and Selenium Evaluation of Apple Orchard in Desertified Area of Ningxia Hui Autonomous Region

Zhang Jing; Huang Xingke; Luo Yaxi; Chang Haitao; Liu Rentao

doi:10.13961/j.cnki.stbctb.2019.06.010

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Soil Quality and Selenium Evaluation of Apple Orchard in Desertified Area of Ningxia Hui Autonomous Region

- Soil Quality and Selenium Evaluation of Apple Orchard in Desertified Area of Ningxia Hui Autonomous Region
- Bulletin of Soiland Water Conservation Vol. 39, Issue 6, Pages: 66-76(2019)
- 作者机构：
  
  1. 宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,宁夏,银川,750021
  2. 宁夏大学农学院,宁夏,银川,750021
  3. 中卫市林业技术推广服务中心,宁夏,中卫,755000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2019.06.010
  CLC：
- Published：2019
- 稿件说明：
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Zhang Jing, Huang Xingke, Luo Yaxi, et al. Soil Quality and Selenium Evaluation of Apple Orchard in Desertified Area of Ningxia Hui Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2019, 39(6): 66-76.
DOI：

Zhang Jing, Huang Xingke, Luo Yaxi, et al. Soil Quality and Selenium Evaluation of Apple Orchard in Desertified Area of Ningxia Hui Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2019, 39(6): 66-76. DOI： 10.13961/j.cnki.stbctb.2019.06.010.

摘要

[目的] 阐明宁夏风沙区苹果园土壤质量演变过程，为该区域苹果园管理与发展、苹果产业可持续发展及脱贫富农提供依据。[方法] 以宁夏沙坡头区2年生（2 a）、5年生（5 a）、10年生（10 a）和25年生（25 a）苹果园为研究样地，以周围荒地为对照（CK），分析各样地土壤理化性质变化特征及其相关关系，并根据土壤质量综合技术评价标准进行苹果园土壤质量评价。[结果] ①随林龄增加，土壤含水量、土壤电导率、土壤全氮、土壤有机碳、土壤速效钾、速效磷和水解性氮均呈现上升趋势，而土壤C/N和土壤温度均呈现下降趋势。土壤黏粉粒、土壤pH值和土壤硒含量呈现先升高后降低趋势，而土壤容重呈现先降低后增加趋势，且均在10 a时出现最值（峰值或谷值）。但土壤孔隙度表现为不同样地间无显著差异性。②苹果园土壤粗砂粒和黏粉粒与土壤温度及土壤C/N呈显著负相关（p<0.01），而与土壤含水量、土壤全氮及有机碳呈显著正相关（p<0.01）。土壤粗砂粒与土壤速效钾及土壤水解性氮呈显著正相关（p<0.01）。土壤含水量与土壤温度及土壤C/N呈显著负相关（p<0.01），而与土壤全氮、有机碳、土壤速效钾和水解性氮呈显著正相关（p<0.01）。土壤容重与土壤黏粉粒、土壤含水量、土壤全氮及有机碳呈负相关（p<0.05）。土壤养分指标之间均存在正相关关系（p<0.05）。但土壤孔隙度和土壤硒与其余指标间均无相关性（p>0.05）。③综合土壤物理、化学及营养指标，土壤质量综合得分排序表现为：25 a > 10 a > 5 a > 0 > 2 a > CK。[结论] 在宁夏风沙区种植苹果经济林5 a左右即可改善土壤理化性质，10 a时促进土壤质量性状显著提高，特别是土壤硒含量处于较高水平，并且随着种植年限增加，宁夏沙区苹果园土壤质量持续改善。

Abstract

[Objective] The evolution process of soil quality in apple orchard was investigated

in order to provide the basis for the management and development of apple orchard

the sustainable development of apple industry and the poverty alleviation in desertified area of Ningxia Hui Autonomous Region.[Methods] We selected apple plantations of 2 years

5 years

10 years and 25 years as the study sites

and the adjacent waste land as the control (CK)

to investigate the changes of soil physical and chemical properties and their correlations. Soil comprehensive quality index was analyzed

in order to assess the soil quality.[Results] ① With the increase of plantation age

soil moisture content

electrical conductivity

total nitrogen

organic carbon

available potassium

available phosphorus and hydrolytic nitrogen all increased

while soil C:N and soil temperature all declined. Soil clay and silt

soil pH value and soil selenium content increased in initial stage and then declined

while soil bulk density decreased firstly and then increased subsequently

and the maximum value(peak or trough value) appeared at 10 years. There was no significant difference between soil porosity in different cultivation age of apple plantations. ② Soil coarse sand and soil clay and silt were negatively(p<0.01) correlated with soil temperature and soil C:N ratio

and there was a positive(p<0.01) correlation between soil moisture content

total nitrogen and organic carbon. In contrast

there was a positive(p<0.01) correlation between soil coarse sand and soil available potassium and hydrolytic nitrogen. Soil moisture content was negatively(p<0.01) correlated with soil temperature and soil C:N

and there was a positive correlation between soil total nitrogen

organic carbon

available potassium and hydrolytic nitrogen. Soil bulk density was a negatively(p<0.05) correlated with soil clay and silt

soil moisture content

total nitrogen and organic carbon. There was a positive correlation between soil nutrients

whereas there was no correlation(p>0.05) between soil porosity

soil selenium and other indicators. ③ According to the soil physical

chemical and nutritional indexes

the soil quality comprehensive index was ranked as:25 years > 10 years > 5 years > 0 > 2 years > CK.[Conclusion] The physical and chemical properties of soil can be improved by planting apple economic forests in Ningxia desertified regions for 5 years

and soil quality and soil selenium can be improved significantly in 10 years. With the increase of planting years

soil quality can be improved continuously in Ningxia windy desert area.

关键词

Keywords

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