Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China.
Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China; Soils, Water and Environment Research Institute, Agricultural Research Centre, 12112, Giza, Egypt.
J Environ Manage. 2021 Jan 1;277:111388. doi: 10.1016/j.jenvman.2020.111388. Epub 2020 Sep 29.
Land degradation due to soil salinity and sodicity is a serious concern in arid ecosystems. Despite the importance of conservation tillage in carbon sequestration and improving soil properties, its effect on saline-sodic soils under amendment application remains unknown. Therefore, the present study aimed to explore the combined effects of inorganic (sulfuric acid and gypsum) and organic (vermicompost) soil amendments and tillage systems (zero, reduced and deep tillage) on saline-sodic soil properties and wheat productivity. Deep tillage with vermicompost application significantly improved soil physical and chemical properties compared with control. Interestingly, integration between deep tillage and vermicompost decreased soil salinity and sodicity by 37% and 34%, respectively, compared with zero tillage and unamended soils. The application of vermicompost surpassed chemical amendments in the improvement of saline-sodic soils and consequently increased the growth and yield of wheat, provided that deep tillage was used as a suitable tillage system. Although deep tillage reduced soil organic carbon, application of vermicompost not only compensated this reduction, but also significantly increased soil organic carbon. This confirms the potential of combined deep tillage and vermicompost as a method for environmentally reclaiming saline-sodic soils.
土壤盐渍化和苏打化导致的土地退化是干旱生态系统的一个严重问题。尽管保护性耕作在碳固存和改善土壤特性方面很重要，但它对施用改良剂后的盐渍苏打土的影响尚不清楚。因此，本研究旨在探索无机（硫酸和石膏）和有机（蚯蚓粪）土壤改良剂与耕作制度（零耕、少耕和深耕）对盐渍苏打土特性和小麦生产力的综合影响。与对照相比，深耕结合蚯蚓粪的应用显著改善了土壤的物理和化学性质。有趣的是，与零耕和未施肥土壤相比，深耕与蚯蚓粪的结合分别降低了 37%和 34%的土壤盐分和苏打度。蚯蚓粪的应用在改良盐渍苏打土方面优于化学改良剂，从而在使用深耕作为合适的耕作制度的情况下，促进了小麦的生长和产量。尽管深耕降低了土壤有机碳，但蚯蚓粪的应用不仅弥补了这种减少，而且还显著增加了土壤有机碳。这证实了联合深耕和蚯蚓粪作为一种环境修复盐渍苏打土的方法的潜力。
