| Cite this article: | 李玮,尹广生,李琪瑞,等.不同改良措施对黄河南岸灌区盐碱土壤 理化性质及团聚体特征的影响[J].灌溉排水学报,0,():-. |
| liwei,Yin Guangsheng,Li Qirui,et al.不同改良措施对黄河南岸灌区盐碱土壤 理化性质及团聚体特征的影响[J].灌溉排水学报,0,():-. |
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| Effects of Different Soil Improvement Measures on Physicochemical Properties and Aggregate Characteristics of Saline Soilin Yellow River Irrigation Area |
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liwei, Yin Guangsheng, Li Qirui, wangyang, Shang Jianying, wangxiang
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China Agricultural University
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| Abstract: |
| 【Objective】 The problems of high salinity, low nutrient and poor structure of saline-alkali soil in the irrigated area on the south bank of the Yellow River seriously restrict agricultural and economic development. Therefore, it is very important to explore low-cost and cost-effective soil improvement products to promote local economic development and increase agricultural income. 【Method】Taking the soil with different salinization degrees （moderate and severe saline soil） in the irrigation area on the south bank of the Yellow River as the research object. The six treatments were as follows: control（CK）, 3% corn straw （T1）, 3% cow manure （T2）, 3% Flue Gas Desulfurization（FGD）（T3）, 2% corn straw with 1% cow manure （T4）, 2% corn straw with 1% FGD （T5）. Through soil culture experiments, the effects of improvement measures on the physicochemical properties and aggregate characteristics of different salinization degree soils in the yellow irrigation area were explored. 【Result】（1） Different improvement measures effectively improved soil physical and chemical properties. For moderate saline-alkali soils, T5 treatment significantly reduced soil pH, which was 11.3% lower than CK. For severe saline-alkali soils, T4 treatment had the most significant effect on reducing soil pH and soluble salt content, which were 4.0% and 11.7% lower than CK, respectively. （2） Five improvement measures could effectively improve the aggregate, increase the average mass diameter （MWD）, geometric mean diameter （GMD）, aggregate content greater than 0.25 mm（WR0.25）, and reduce the fractal dimension （D）. For moderate saline-alkali soils, MWD and GMD follow this order: T1>T5> T2>T4>T3; The number of large aggregates was significantly increased by five improvement measures, and WR0.25 increased by 199.9%, 116.3%, 23.8%, 125.3% and 204.7%, respectively. For severe saline soil, the WR0.25 treated with T2 and T4 increased by 81.10% and 68.02%. （3） According to the principal component factor analysis, the improvement effects were as follows: for moderate saline soil, T5 > T1 > T2> T4 > T3 > CK, for severe saline soil, T2 > T4 > T1 > T5 > T3 > CK. 【Conclusion】In summary, for moderate saline-alkali soils, the 3% corn straw treatment and 2% corn straw with 1% FGD treatment significantly improved the soil physicochemical properties and structure; for severe saline-alkali soils, 3% cow manure treatment and 2% corn straw with 1% cow manure treatment improved the physical and chemical properties and structure of the soil to a certain extent. |
| Key words: saline-alkali soil; corn straw ; soil aggregates; physical and chemical properties |
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