广西地区甘蔗粉垄与旋耕耕作方式下土壤孔隙特征变化  

Changes in Soil Pore Characteristics Under Powder Ridge Tillage and Rotary Tillage in Sugarcane Field in Guangxi Region

作　　者：张硕 王松 张钰 张红霞 韦本辉[3] 黄金生[4] 甘磊[1,2] Zhang Shuo;Wang Song;Zhang Yu;Zhang Hongxia;Wei Benhui;Huang Jinsheng;Gan Lei(Guangxi Collaborative Innovation Center for Water Pollution Control and Safety in Karst Area,Guilin University of Technology,Guilin,Guangxi 541004,China;Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guilin,Guangxi 541004,China;Institute of Economic Crops,Guangxi Academy of Agricultural Sciences,Nanning 530007,China;Agricultural Resource and Environment Research Institute,Guangxi Academy of Agricultural Sciences,Nanning 530007,China)

机构地区：[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]桂林理工大学广西环境污染控制理论与技术重点实验室,广西桂林541004 [3]广西农业科学院经济作物研究所,南宁530007 [4]广西农业科学院农业资源与环境研究所,南宁530007

出　　处：《水土保持研究》2024年第6期221-229,共9页Research of Soil and Water Conservation

基　　金：国家自然科学基金(42067002,4226070061);广西科技重大专项(桂科AA20302020-2)。

摘　　要：[目的]分析广西地区甘蔗地不同耕作方式下土壤孔隙结构特征参数的变化规律,为粉垄技术的推广应用提供一定的理论依据。[方法]选取经过3年粉垄20 cm耕作(F_(20))和旋耕20 cm耕作(X_(20))处理的两种不同耕作方式下的甘蔗地土壤作为研究对象,同时利用X射线CT扫描技术并结合ImageJ等软件来获取土壤孔隙分布二维和三维特征的参数指标,并对土壤孔隙结构进行了三维重构可视化。[结果]两种耕作处理下均会对土壤二维和三维孔隙数量产生影响,呈现较小孔隙高于较大孔隙的情况。F_(20)处理在二维及三维孔隙数量形成上要低于X_(20)处理,但前者整体圆度均高于后者。F_(20)处理整体上土壤孔隙面密度远低于X_(20)处理,但相同土层深度下前者土壤孔隙复杂度要高于后者。F_(20)处理的孔隙度和紧实度均值(2.08%,25.22)低于X_(20)处理均值(4.71%,27.23)(p<0.05),但前者比表面积均值(2.62 mm^(-1))高于X_(20)处理均值(2.50 mm^(-1))(p<0.05)。两种处理下连通度均值无明显差异,但F_(20)处理的弯曲度均值1.42%与X_(20)处理均值1.45%差异显著(p<0.05)。两种处理下分支长度密度差异较大,X_(20)处理其均值(115.87 mm/cm^(3))高于F_(20)处理均值(50.41 mm/cm^(3))(p<0.05)。同时两种处理的三维重构上F_(20)处理孔隙分布较为均匀且甘蔗的主要生长区连通性孔隙分布要优于X_(20)处理。[结论]相较传统旋耕而言,在广西地区进行甘蔗种植的过程中,粉垄耕作在土壤孔隙结构上更具优势性,更有利于促进甘蔗根系生长,提高甘蔗的产量。[Objective]The objectives of this study are to analyze the variation patterns of soil pore structure characteristic parameters under different tillage methods in sugarcane fields in Guangxi region,and to provide a theoretical foundation for the promotion and application of powder ridging tillage technology.[Methods]Soils obtained from sugarcane fields had been subjected to two different tillage methods:powder ridging tillage to a depth of 20 cm(F_(20))and rotary tillage to a depth of 20 cm(X_(20))after three years of cultivation.X-ray CT scanning technology,in combination with ImageJ,was utilized for the analysis of soil pore distribution parameters in both two-dimensional and three-dimensional formats,ultimately enabling the visualization of the three-dimensional reconstruction of soil pore structure.[Results]Both tillage methods influenced the quantity of two-dimensional and three-dimensional soil pores,with a higher prevalence of smaller pores compared to larger ones.The F_(20) treatment showed the reduced amounts of two-dimensional and three-dimensional pores in comparison to the X_(20) treatment,but demonstrated higher overall roundness.The soil pore surface density exhibited a significant decrease in the F_(20) treatment in comparison to the X_(20) treatment.Conversely,the complexity of soil pores at the same soil depth was found to be higher in the former treatment.The mean porosity and compactness values of the F_(20) treatment(2.08%,25.22)were lower than those of X_(20) treatment(4.71%,27.23)(p<0.05),whereas the mean specific surface area value of the F_(20) treatment(2.62 mm^(-1))was higher than that of X_(20) treatment(2.50 mm^(-1))(p<0.05).The mean connectivity values did not exhibit a statistically significant difference between the two treatments;however,the mean curvature value of F_(20) treatment(1.42%)was significantly different from that of X_(20) treatment(1.45%)(p<0.05).Moreover,the branch length density differed greatly between the two treatments,with the mean value of X_(20) treatment(115.87

关 键 词：孔隙结构 CT扫描 三维重构 粉垄耕作 甘蔗地 

分 类 号：S152[农业科学—土壤学] S566.1[农业科学—农业基础科学]