Assessment of the responses of soil pore properties to combined soil structure amendments using X-ray computed tomography
文献类型： 外文期刊
作者： Yang, Yonghui 1 ; Wu, Jicheng 1 ; Zhao, Shiwei 4 ; Han, Qingyuan 5 ; Pan, Xiaoying 1 ; He, Fang 1 ; Chen, Chun 3 ;
作者机构： 1.Henan Acad Agr Sci, Inst Plant Nutr & Resource Environm, Zhengzhou 450002, Henan, Peoples R China
2.Minist Agr, Yuanyang Expt Stn Crop Water Use, Yuanyang 453514, Henan, Peoples R China
3.Northwest A&F Univ, Coll Life Sci, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China
4.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
5.Armed Police Corps Hosp Henan, Zhengzhou 450052, Henan, Peoples R C
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2018 年 8 卷
页码：
收录情况： SCI
摘要： Soil amendments, such as straw mulch, organic fertilizers and superabsorbent polymer (SAP), are extensively applied to improve soil structure and porosity, and we reported the functional consequences of the individual application of these amendments in our previous study. However, whether combined amendments are more effective than their individual applications for improving soil pore structure is unknown. Here, we conducted X-ray computed tomography (CT) scanning on undisturbed soil columns to investigate the efficiency of two-amendment application, including straw mulch and organic manure, SAP and organic manure, or SAP and straw mulch, for improving soil pore properties and pore distribution. The X-ray CT technique allows us to accurately determine the number, morphology, and location of macropores (> 1 mm in diameter) and smaller pores (0.13-1.0 mm). Compared to the control treatment, which showed the lowest increase in soil porosity, all the combined treatments led to an increase in the numbers of both macropores and smaller soil pores, causing a significant improvement in soil structure and porosity. Among these treatments, the application of both straw mulch and organic manure was the most effective for improving soil porosity and soil physical structure.
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