[1]GAN Lei,LI Jian,LI Shuai,et al.Soil Pore Characteristics of Sugarcane Field Under Different Tillage Treatments in Guangxi[J].Research of Soil and Water Conservation,2020,27(06):122-130.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
122-130
Column:
目次
Public date:
2020-10-20
- Title:
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Soil Pore Characteristics of Sugarcane Field Under Different Tillage Treatments in Guangxi
- Author(s):
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GAN Lei1,2, LI Jian3, LI Shuai3, WEI Ling3, Saeed Rad 1,3
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(1.Guangxi Collaborative Innovation Center for Water Pollution Control and Safety in Karst Area, Guilin University of Technology, Guilin, Guangxi 541004, China; 2.Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin, Guangxi 541004, China; 3.College of Environmental Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541004, China)
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- Keywords:
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pore characteristics; sugarcane field; CT(computerized tomography)scan; 3D reconstruction; tillage measures
- CLC:
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S152.5
- DOI:
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- Abstract:
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This study aimed to explore influence of different tillage treatments on soil pore structure in sugarcane fields in Guangxi region and provide reference for appropriate tillage to local sugarcane planting. In this study, sugarcane fields under tillage(CT)and non-tillage(NT)for 3 years in Guangxi were studied. Computed tomography with ImageJ software was applied to obtain the soil pore distribution features of the two-dimensional and three-dimensional space characteristics. The three-dimensional reconstruction and visualization of soil pore structure have been conducted. The results showed that there was a small difference in soil texture between the two treatments, but the content of soil organic matter in tillage plot increased and the bulk density decreased significantly; tillage mainly affected the number of macropores and medium pores in the soil, in which the number of macropores decreased and the number of medium pores increased; for the two-dimensional distribution, the density and complexity of pore cross-sectional area in tillage plot fluctuated more than that in non-tillage plot; as for the three-dimensional characteristics, the values of pore density(0.526%), pore number(8 174)and tortuosity(1.314)in tillage plot were less than those of values in non-tillage plot for 1.181%, 16 306, 1.348, respectively; however, the average connectivity values of pore in tillage plot(0.687)were greater than these values(0.465)in non-tillage plot; for the three-dimensional visualization figure, the distribution range of pores in non-tillage plot was larger, but relatively isolated, while the more network connectivity is demonstrated in the pores in tillage plot. On the other hand, since this study also has proved the method of CT scanning combined with three-dimensional reconstruction, hence the information of soil internal characteristics intuitively and comprehensively can be obtained. Compared with non-tillage in this study, tillage could reduce tortuosity but increase connectivity of the soil. Moreover, tillage could promote the formation of biological macropores that was located at the surface of the soil, which could facilitate infiltration of soil moisture. Thus, tillage is beneficial to crop root growth and microbial activity, and therefore improves the soil water and solute transport corridor, which lets tillage play a positive role in sugarcane growth.