秸秆配施蚯蚓对设施次生盐渍化土壤改良效果

马志梅; 张月; 裴亚楠; 吕卫光; 张娟琴; 白娜玲; 张海韵; 李双喜; 张翰林

Effects of straw combined with earthworm on the remediation and improvement of secondary salinized greenhouse soil

Received:August 18, 2024

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KeyWord:secondary salinization greenhouse soil;straw;earthworm;salt ions;soil nutrients;grey correlation analysis

Author Name	Affiliation	E-mail
MA Zhimei	College of Oceanography and Ecological Science of Shanghai Ocean University, Shanghai 201306, China Shanghai Key Laboratory of Horticultural Technology, Shanghai 201403, China
ZHANG Yue	Eco-environmental Protection Institute of SAAS, Shanghai 201403, China Agricultural Environment and Farmland Conservation Experiment Station of Ministry of Agriculture and Rural Affairs, Shanghai 201403, China
PEI Yanan	Eco-environmental Protection Institute of SAAS, Shanghai 201403, China Shanghai Key Laboratory of Horticultural Technology, Shanghai 201403, China
Lü Weiguang	Eco-environmental Protection Institute of SAAS, Shanghai 201403, China Shanghai Key Laboratory of Horticultural Technology, Shanghai 201403, China Agricultural Environment and Farmland Conservation Experiment Station of Ministry of Agriculture and Rural Affairs, Shanghai 201403, China
ZHANG Juanqin	Eco-environmental Protection Institute of SAAS, Shanghai 201403, China Agricultural Environment and Farmland Conservation Experiment Station of Ministry of Agriculture and Rural Affairs, Shanghai 201403, China
BAI Naling	Eco-environmental Protection Institute of SAAS, Shanghai 201403, China Agricultural Environment and Farmland Conservation Experiment Station of Ministry of Agriculture and Rural Affairs, Shanghai 201403, China
ZHANG Haiyun	Eco-environmental Protection Institute of SAAS, Shanghai 201403, China Agricultural Environment and Farmland Conservation Experiment Station of Ministry of Agriculture and Rural Affairs, Shanghai 201403, China
LI Shuangxi	Eco-environmental Protection Institute of SAAS, Shanghai 201403, China Agricultural Environment and Farmland Conservation Experiment Station of Ministry of Agriculture and Rural Affairs, Shanghai 201403, China
ZHANG Hanlin	Eco-environmental Protection Institute of SAAS, Shanghai 201403, China Shanghai Key Laboratory of Horticultural Technology, Shanghai 201403, China Agricultural Environment and Farmland Conservation Experiment Station of Ministry of Agriculture and Rural Affairs, Shanghai 201403, China	zhanghanlinchick@163.com

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Abstract:

To evaluate the effectiveness of integrating straw with earthworms for the remediation of secondary saline soils under controlled conditions, this study conducted simulation experiments employing indoor soil columns with in-situ soil at various depths（0-10, 10-30 cm, and 30-50 cm）. This investigation focused on the impacts of the straw-earthworm combination on salinized greenhouse soil by analyzing soil nutrient concentrations and salt ion profiles, providing insights into optimal remediation strategies for the region. The results showed that the primary soluble salt ions were Mg²⁺, SO₄^2-, Cl^-, Ca²⁺, and Na⁺, with highest concentrations observed in the 0-10 cm layer. The introduction of earthworms reduced electrical conductivity（EC）within the 0-10 cm layer, although it caused salt to accumulate in deeper layers. Specifically, the S2E treatment（5 kg·m^-2 of straw coupled with 50 earthworms·m^-2）reduced EC in the 0-10 cm layer by 56.04% compared to other treatments. Moreover, the S2E treatment primarily altered the composition of major salt ions in the soil by reducing the concentrations of SO 2 4- Ca²⁺, Mg²⁺, K⁺, and Na⁺ in the 0-10 cm layer, while increasing HCO - 3 levels. Additionally, earthworm activity was associated with an increase in available phosphorus（AP）in both the 0-10 cm and 10-30 cm layers. A lower straw application rate in conjunction with earthworms enhanced ammonium nitrogen（AN）concentrations in the 10-30 cm and 30-50 cm layers, while a higher straw dosage primarily increased available potassium（AK）levels at these depths. The increase in organic matter（OM）in the 10-30 cm layer was primarily attributed to straw application. Grey relational analysis demonstrated that the S2E treatment significantly improved soil properties in the 0-10 cm and 10-30 cm layers, whereas the S1E treatment（2.5 kg·m^-2 of straw with 50 earthworms·m^-2）was most advantageous for the 30-50 cm layer. In summary, the synergistic application of straw and earthworms effectively reduced soil salinity and enhanced nutrient profiles, with the S2E treatment showing the most significant improvements in soil characteristics at the 0-10 cm and 10-30 cm depths.