| This article has been：Browse 580Times Download 518Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2021565 |
|
| Improving Soil Structure by Organic Material Amendments: A Review |
|
XUAN Kefan, LI Xiaopeng, ZHANG Jiabao, JIANG Yifei, LIU Jianli
|
|
1. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China
|
| Abstract: |
| 【Objective】Organic materials including crop straws, organic fertilizers, biochar have been widely used in agriculture as an agent to improve soil structure and fertility, but how, and to what extent, their efficacy varies with soil texture and environmental factors remains elusive. This review aims to fill this knowledge gap.【Method】Our review is based on papers published over the past decades, which reported the effects of different organic material amendments on structure and fertility of soils with various textures in different climatic regions.【Result】In low-temperature and arid regions, application of organic fertilizer and polyacrylamide works better for improving soil structure, while in regions characterized by changeable climate and high temperature and humidity, incorporating straw to soils has the edge to improve physical properties of the soils. Amending coarse-textured soils with biochar improves soil structure more than other amendments, while woody peat works better for fine-textured soils. We also review the latest development in non-destructive imaging technologies inducing x-ray computed tomography and digital image processing which have been increasingly used to quantify soil structural alteration due to natural and management practice changes.【Conclusion】Soils are hierarchically structured and there is no universal rule to select an amending material to improve their structure. Its selection should consider the inherent physical and chemical properties of the soils to be amended and the climate region. |
| Key words: soil structure; soil improvement; organic materials; quantitative study |
|
|
