Improvement effect of different conditioners on the saline-alkaline soil in Daʼan City

doi:10.14088/j.cnki.issn0439-8114.2025.11.009

Abstract

Abstract: To study the improvement effects of different conditioners on the typical soda-saline-alkali soil in Daʼan City, Jilin Province, a soil column incubation experiment was conducted to analyze the reduction effects of four conditioners of desulfurized gypsum(DG), ferrous sulfate(FS), potassium fulvate(PF), and furfural residue(FR) on the limiting factors of saline-alkali soil. The optimal combinations of conditioners were screened by cluster analysis, principal component analysis, and entropy weight-TOPSIS method. A pot experiment was then conducted to further investigate the effects of different conditioner combinations on soil improvement and crop growth. The most suitable conditioner combination for the soda-saline-alkali soil in Daʼan City was selected by the entropy weight-TOPSIS method. The results showed that ferrous sulfate and desulfurized gypsum significantly reduced soil pH and alkalization degree（P<0.05）. Potassium fulvate (PF) significantly increased the contents of soil available potassium and hydrolyzable nitrogen, while decreasing soil pH and alkalization degree (P<0.05). Furfural residue (FR) effectively improved soil organic matter content. Under the compound application condition, the optimal amendment combination was potassium fulvate:desulfurized gypsum:ferrous sulfate = 2:1:1,with an application rate of 0.5%. Compared with the control, this combination significantly reduced soil pH by 6.29% and alkalization degree by 36.80%, increased soil organic matter content by 5.06%, and improved the plant height and aboveground fresh weight per plant of rice by 18.44% and 38.04%, respectively.

Key words: saline-alkaline soil, conditioner, leaching, chemical improvement, Daʼan City

CLC Number:

WANG Shi-ting, WANG En-biao, WEI Xiao-na, LI Ji-zhi, MENG Yao, SHI De-zhi, WANG Yong-huan, LI Ting-ting. Improvement effect of different conditioners on the saline-alkaline soil in Daʼan City[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(11): 71-79.

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