Soil Pore Structure and Water Movement Characteristics of Sugarcane Field Under the Influence of Two Typical Tillage Methods

LIU Junjie; CHEN Xiaobing; QIN Zicheng; LIU Sijia; XU Hao; YANG Ting

doi:10.13870/j.cnki.stbcxb.2023.02.027

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Soil Pore Structure and Water Movement Characteristics of Sugarcane Field Under the Influence of Two Typical Tillage Methods

更新时间：2025-03-12

- Soil Pore Structure and Water Movement Characteristics of Sugarcane Field Under the Influence of Two Typical Tillage Methods
- Vol. 37, Issue 2, Pages: 237-245(2023)
- 作者机构：
  
  1. 桂林理工大学广西岩溶地区水污染控制与用水安全保障协同创新中心,广西,桂林,541004
  2. 桂林理工大学环境科学与工程学院,广西,桂林,541004
  3. 桂林理工大学广西环境污染控制理论与技术重点实验室,广西,桂林,541004
  4. 广西环境污染控制理论与技术重点实验室科教结合科技创新基地,广西,桂林,541004
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.02.027
  CLC： S152.5;S566.1
- Published：2023
- 稿件说明：
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LIU Junjie, CHEN Xiaobing, QIN Zicheng, et al. Soil Pore Structure and Water Movement Characteristics of Sugarcane Field Under the Influence of Two Typical Tillage Methods[J]. 2023, 37(2): 237-245.
DOI：

LIU Junjie, CHEN Xiaobing, QIN Zicheng, et al. Soil Pore Structure and Water Movement Characteristics of Sugarcane Field Under the Influence of Two Typical Tillage Methods[J]. 2023, 37(2): 237-245. DOI： 10.13870/j.cnki.stbcxb.2023.02.027.

摘要

为了明确农业生产过程中耕作方式对田间土壤孔隙结构及土壤水分运动特性的影响

以广西农地蔗田为研究对象

基于土壤切片技术分析研究免耕和垄耕2种典型耕作方式蔗田的田间土壤孔隙结构特征

并结合土柱模拟入渗试验

探究土壤孔隙结构对土壤水分运动的影响

进一步揭示孔隙结构与土壤水分运动特性之间的相互作用关系。结果表明:随着土层深度的增加

免耕蔗田孔隙形态以聚集的团块状分布为主

垄耕蔗田孔隙形态以条状分布为主。与免耕蔗田相比

垄耕蔗田的土壤总孔隙度和＞2.5 mm孔径的孔隙度分别增加32.5%和21.9%。垄耕蔗田在局部土层深度范围内显著增加上下土层孔隙的变异度(p＜0.05)

显著降低土壤孔隙的连通性(平均邻近指数为0.448)(p＜0.05)

土壤孔隙形态相对规则(平均成圆率为0.335)。对于土壤水分运动特性

免耕蔗田总体的土壤饱和导水率和质量流率显著高于垄耕蔗田(p＜0.05)

初始含水率显著低于垄耕蔗田(p＜0.05)

质量流率随时间变化强度相对较大

提高水流入渗能力。垄耕降低土壤孔隙结构连通性

使水分蓄存在表层土壤中

一定程度上可降低土壤水分的入渗现象

改变蔗田土壤水分状况。

Abstract

In order to clarify the effects of tillage methods on soil pore structure and soil water movement characteristics during agricultural production

sugarcane field in Guangxi was taken as the research object

soil pore structure characteristics of sugarcane field under two typical tillage methods of no-tillage and ridge tillage were studied based on soil slicing technique

combined with simulated infiltration test of soil column

the influence of soil pore structure on soil water movement was explored

and the interaction between pore structure and soil water movement characteristics was further revealed.The results showed that with the increase of soil layer depth

the pore morphology of no-till sugarcane field was dominated by aggregated clumps

while the pore morphology of ridge tillage sugarcane field was dominated by strip distribution.Compared with no-till sugarcane field

the total porosity and porosity of the soil with > 2.5 mm pore size increased by 32.5% and 21.9%

respectively

in ridge tillage sugarcane field.In the range of local soil depth

the ridge cultivated land significantly increased the porosity variation of the upper and lower soil layers (p<0.05)

and significantly decreased the connectivity of soil pores (average proximity index was 0.448)(p<0.05)

the soil pore morphology was relatively regular (average pore roundness was 0.335).As for the soil water movement characteristics

compared with the ridge tillage sugarcane field

the overall soil saturated hydraulic conductivity and mass flow rate in no-till sugarcane field were significantly higher (p<0.05)

while the initial water content was significantly lower (p<0.05).The change intensity of mass flow rate over time was relatively large

which improved the water infiltration capacity.Compared with no-tillage

the ridge tillage of sugarcane field reduced the connectivity of soil pore structure and resulted in water separation and storage in the surface soil

thus could reduce the infiltration of soil water to a certain extent

which was helpful to improve the soil water condition of sugarcane field.

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