盐分积累对设施土壤电化学性质和水稳性团聚体影响的模拟研究

操庆; 魏晓兰; 吴彩姣; 孙玮; 汤燕; 谷勋刚

doi:10.13961/j.cnki.stbctb.2016.01.028

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盐分积累对设施土壤电化学性质和水稳性团聚体影响的模拟研究

试验研究

- 盐分积累对设施土壤电化学性质和水稳性团聚体影响的模拟研究
- Simulation Study on Effects of Salt Accumulation on Electrochemical Properties and Water-stable Aggregates in Greenhouse Soil
- 水土保持通报 2016年36卷第1期页码：164-168
- 作者机构：
  
  安徽农业大学资源与环境学院,安徽,合肥,230036
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目及逆境与植物营养重点实验室共同资助"钾对茶叶低萜类中间体异戊烯焦磷酸合成关键酶的调节研究;低钾胁迫对茶树叶片低萜类化合物合成的影响及其机制研究"(31470688,31272235)
- DOI：10.13961/j.cnki.stbctb.2016.01.028
  中图分类号：
- 纸质出版：2016
- 稿件说明：
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操庆, 魏晓兰, 吴彩姣, 等. 盐分积累对设施土壤电化学性质和水稳性团聚体影响的模拟研究[J]. 水土保持通报, 2016,36(1):164-168.

CAO Qing, WEI Xiaolan, WU Caijiao, et al. Simulation Study on Effects of Salt Accumulation on Electrochemical Properties and Water-stable Aggregates in Greenhouse Soil[J]. Bulletin of Soiland Water Conservation, 2016, 36(1): 164-168.
操庆, 魏晓兰, 吴彩姣, 等. 盐分积累对设施土壤电化学性质和水稳性团聚体影响的模拟研究[J]. 水土保持通报, 2016,36(1):164-168. DOI： 10.13961/j.cnki.stbctb.2016.01.028.

CAO Qing, WEI Xiaolan, WU Caijiao, et al. Simulation Study on Effects of Salt Accumulation on Electrochemical Properties and Water-stable Aggregates in Greenhouse Soil[J]. Bulletin of Soiland Water Conservation, 2016, 36(1): 164-168. DOI： 10.13961/j.cnki.stbctb.2016.01.028.

摘要

[目的] 分析在盐分影响下土壤pH值和表面电荷量的变化趋势

以及对土壤水稳性团聚体结构的影响

为设施园艺及菜园土壤的改良提供参考. [方法] 以合肥市周边地区的黄褐土为研究对象

研究盐分对土壤酸度、表面电荷以及水稳性团聚体含量的影响.试验设置了4个水平的盐分(0.3%

0.6%

0.9%

1.2%)处理和对照

在25 ℃恒温培养箱中进行了60 d的培养试验.分别在10

30和60 d取样分析. [结果] 盐分浓度越高

土壤pH值越低

培养60 d后1.2%处理与CK相比土壤pH值下降0.53;随着盐分浓度的升高

土壤的表面负电荷量呈递减趋势

正电荷量则变化不明显;模拟盐的增加能促进土壤中小团聚体相互胶结

从而促使水稳性大团聚体增多. [结论] 盐分能够使土壤pH值和表面负电荷量下降;使土壤发生胶结作用

有助于大团聚体的形成.

Abstract

[Objective] The objective of this study is to analyze the variations of soil pH value and surface charge under salt stress

and its influences on the structure of soil water-stable aggregates in order to provide basis for the soil amelioration in horticulture and vegetable garden. [Methods] The laboratory incubation experiment was applied to investigate the effects of salt accumulation on pH value

electrochemical properties and water-stable aggregates of yellow cinnamon soil in the surrounding area of Hefei City. Four salinity treatments(0.3%

0.6%

0.9%

1.2%) and a control treatment(CK) were set up and incubated for 60 d at 25 ℃ in incubator. The samples were then collected from the incubator at 10 d

30 d and 60 d separately

for the following analysis. [Results] Soil pH value decreased with the increase of salt concentration. Compared to CK

soil pH value of the sample incubated after 60 d decreased by 0.53 at 1.2% salinity level. The amount of soil negative charge decreased with the increase of salt concentration

while there was no significant change in positive charge. The simulated salt with Ca2+

Mg2+ improved the cementation of micro-aggregates

and resulted in an increase of the amount of macro-aggregates. [Conclusion] Salt can decrease soil pH value and soil negative charge

and improve soil cementation

and also increase the amount of micro-aggregates.

关键词

Keywords

references

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