Effects of Exogenous Additives on the Characteristics of Soil Dry Shrinkage Cracks

CHEN Shangmao; GUO Peng; DENG Bo; WEI Leijia; MA Ze; CHEN Dan; BI Lidong

doi:10.13870/j.cnki.stbcxb.2023.06.016

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Effects of Exogenous Additives on the Characteristics of Soil Dry Shrinkage Cracks

更新时间：2025-03-12

- Effects of Exogenous Additives on the Characteristics of Soil Dry Shrinkage Cracks
- Vol. 37, Issue 6, Pages: 119-125(2023)
- 作者机构：
  
  1. 河海大学农业科学与工程学院,南京,211100
  2. 中国电建集团中南勘测设计研究院有限公司,长沙,410014
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.06.016
  CLC：
- Published：2023
- 稿件说明：
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CHEN Shangmao, GUO Peng, DENG Bo, et al. Effects of Exogenous Additives on the Characteristics of Soil Dry Shrinkage Cracks[J]. 2023, 37(6): 119-125.
DOI：

CHEN Shangmao, GUO Peng, DENG Bo, et al. Effects of Exogenous Additives on the Characteristics of Soil Dry Shrinkage Cracks[J]. 2023, 37(6): 119-125. DOI： 10.13870/j.cnki.stbcxb.2023.06.016.

摘要

为研究外源添加物对土壤干缩裂缝特征的影响

选取水田、旱田、林地3种土地利用方式

添加生石灰(1 g/kg)、黄腐酸(10 g/kg)、鱼塘底泥(250 g/kg)、生物炭(15 g/kg)4种外源添加物

进行土壤干燥收缩试验。结果表明:除生石灰外

不同土壤外源添加物处理下各用地类型土壤干燥收缩裂缝特征变化趋势非常一致

裂缝面密度、长密度、平均宽度均呈现耕作层水田＞旱田＞林地、犁底层水田＞林地＞旱田。生石灰对土壤干燥收缩裂缝特征无显著影响;黄腐酸使土壤干缩裂缝面密度、裂缝平均宽度增加

但对土壤干缩裂缝长密度无显著影响;鱼塘底泥使土壤裂缝面密度、长密度增加

但对干缩裂缝平均宽度无影响;生物炭使土壤裂缝面密度、裂缝平均宽度降低

但使裂缝长密度增加。相对于空白对照

不同外源添加物对于土壤裂缝面密度影响程度表现为耕作层鱼塘底泥＞生物炭＞黄腐酸＞生石灰、犁底层黄腐酸＞鱼塘底泥＞生物炭＞生石灰;对于裂缝长密度影响程度表现为耕作层生物炭＞鱼塘底泥＞生石灰＞黄腐酸、犁底层生物炭＞鱼塘底泥＞黄腐酸＞生石灰。外源添加物对土壤裂缝特征产生重要影响

生石灰对于土壤裂缝发育影响不显著

黄腐酸、鱼塘底泥促进土壤裂缝发育

生物炭可以抑制土壤裂缝的发育。研究结果可为农业生产中使用改良土壤剂改良土壤理化性质提供参考。

Abstract

To investigate the effect of exogenous additions on the characteristics of soil drying and shrinkage crack. Three utilization types of soil samples were selected for paddy field

dry field and forest land and four exogenous additives including quicklime (1 g/kg)

fulvic acid (10 g/kg)

fish pond sediment (250 g/kg)

and biochar (15 g/kg)

were added to conduct soil drying and shrinkage tests. The results showed that

in addition to quicklime

the change trend of soil drying shrinkage crack characteristics of different land types under different soil amendment treatments was very consistent

and the surface density

length density and average width of crack showed the change trend of cultivated layer paddy field＞dry field＞forest land

and plow bottom paddy field＞forest land＞dry field. Quicklime has no significant effect on soil dry shrinkage crack characteristics; fulvic acid increased the surface density of soil dry shrinkage cracks and the average width

but had no significant effect on the length density of soil dry shrinkage cracks; fish pond sediment increased the surface density of soil cracks and the length density

but had no effect on the average width of dry shrinkage cracks; biochar reduced the surface density of soil cracks and the average width of cracks

but increased the average length density of cracks. Compared with the blank control

the degree of influence of different exogenous additives on the density of soil fracture surface were as follows: Cultivated layer fish pond sediment＞biochar＞fulvic acid＞quicklime

plow bottom fulvic acid＞fish pond sediment＞biochar＞quicklime; the degree of influence on fracture length density was as follows: Cultivated layer biochar ＞fish pond sediment＞quicklime＞fulvic acid

plow bottom biochar＞fish pond sediment＞fulvic acid＞quicklime in the plough bottom layer. Exogenous additives have an important effect on the characteristics of soil cracks. Quicklime has no significant effect on the development of soil cracks. Fulvic acid and fish pond sediment can promote the development of soil cracks

and biochar can inhibit the development of soil cracks. The results can be used to improve the physical and chemical properties of soil using improved soil agents in agricultural production.

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