Effects of Different Amendment Materials on Reclaimed Soil Structure and Organic Matter Content of Hollow Village in Loess Region

Liu Zhe; Wang Huanyuan; Sun Yingying; Sun Zenghui; Zhang Ruiqing

doi:10.13961/j.cnki.stbctb.2022.05.003

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Effects of Different Amendment Materials on Reclaimed Soil Structure and Organic Matter Content of Hollow Village in Loess Region

- Effects of Different Amendment Materials on Reclaimed Soil Structure and Organic Matter Content of Hollow Village in Loess Region
- Bulletin of Soiland Water Conservation Vol. 42, Issue 5, Pages: 16-24(2022)
- 作者机构：
  
  1. 陕西省土地工程建设集团有限责任公司,陕西,西安,710075
  2. 自然资源部退化及未利用土地整治工程重点实验室,陕西,西安,710021
  3. 陕西地建土地工程技术研究院有限责任公司,陕西,西安,710021
  4. 陕西省土地整治工程技术研究中心,陕西,西安,710075
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2022.05.003
  CLC： S156.2;S158.5
- Published：2022
- 稿件说明：
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Liu Zhe, Wang Huanyuan, Sun Yingying, et al. Effects of Different Amendment Materials on Reclaimed Soil Structure and Organic Matter Content of Hollow Village in Loess Region[J]. Bulletin of Soiland Water Conservation, 2022, 42(5): 16-24.
DOI：

Liu Zhe, Wang Huanyuan, Sun Yingying, et al. Effects of Different Amendment Materials on Reclaimed Soil Structure and Organic Matter Content of Hollow Village in Loess Region[J]. Bulletin of Soiland Water Conservation, 2022, 42(5): 16-24. DOI： 10.13961/j.cnki.stbctb.2022.05.003.

摘要

[目的

]

解决黄土区空心村废弃宅基地复垦土壤结构不良，肥力低下的严重问题，为空心村复垦土壤的质量提升提供理论依据。[方法

]

选取6种不同改良材料处理进行了5 a的田间定位试验，分析了对照(CK)、熟化剂(TM)、粉煤灰(TF)、有机肥(TO)、熟化剂+粉煤灰(TMF)、熟化剂+有机肥(TMO)、粉煤灰+有机肥(TFO)处理对复垦土壤结构稳定性和有机质含量的改善效应。[结果

]

与对照处理相比，长期施用不同改良材料后空心村复垦土壤有机质含量明显增加，促使水稳性微团聚体(＜0.25 mm)胶结形成水稳性大团聚体(＞0.25 mm)，水稳性大团聚体含量均呈增加趋势。在0—15 cm土层，TM，TF，TO，TMF，TMO，TFO处理下水稳性大团聚体含量分别比CK处理增加了328.2%，130.0%，87.8%，81.1%，36.7%，12.2%。TF，TO，TMF，TMO，TFO处理显著增加了土壤团聚体平均重量直径(MWD)、几何平均直径(GMD)值，降低了不稳定团粒指数(E

)、分形维数(D)(p＜0.05)。土壤有机质含量与MWD，GMD，＞2 mm粒级水稳性团聚体含量呈极显著正相关关系，与E

，D，＜0.25粒级水稳性微团聚含量呈极显著负相关。其中，粉煤灰+有机肥处理下空心村复垦土壤的水稳性大团聚体和有机质含量最高，土壤结构稳定性提升效果最好。[结论

]

在黄土区空心村废弃宅基地复垦土壤整治中，粉煤灰+有机肥的有机无机结合处理是黄土区空心村复垦土壤结构改善和肥力提升适宜的改良措施。

Abstract

[Objective] The poor structure and low fertility of reclaimed soil of abandoned homesteads in hollow villages in the loess area were addressed in order to provide a theoretical basis for improving the quality of reclaimed soils. [Methods] The effects of six different treatments of modified materials on structural stability and soil organic matter (SOM) of a reclaimed soil were compared with a control (CK) treatment in a five-year field experiment. The modified materials treatments were maturing agent (TM)

fly ash (TF)

organic fertilizer (TO)

maturing agent + fly ash (TMF)

maturing agent + organic fertilizer (TMO)

and fly ash + organic fertilizer (TFO). [Results] SOM content was significantly increased (compared with CK) after the application of the different modified materials that promoted the cementation and aggregation of water-stable microaggregates (<0.25 mm) into water-stable macroaggregates (>0.25 mm). The content of water-stable macroaggregates showed an increasing trend. In the 0—15 cm soil layer

the contents of water-stable macroaggregates under TM

TMF

TMO

and TFO were increased by 328.2%

130.0%

87.8%

81.1%

36.7%

and 12.2%

respectively

compared with CK. Moreover

the application of the TF

TMF

TMO

and TFO treatments significantly increased the mean weight diameter (MWD) and geometric mean diameter (GMD) of soil aggregates

while the unstable-aggregate index (ELT) and fractal dimension (D) were decreased (p<0.05). SOM content was significantly positively correlated with MWD

GMD

and >2 mm water-stable aggregates

and significantly negatively correlated with the ELT

and water-stable microaggregates. In particular

reclaimed soil under TFO had the highest content of SOM and water-stable macroaggregates

and the best effect on improving soil structrual stability. [Conclusion] Using a combination of organic fertilizer and fly ash is an appropriate practice to improve reclaimed soil structure and fertility of abandoned homesteads in hollow villages in the loess region.

关键词

Keywords

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