ABSTRACT Amelioration of saline soil is a requisite in order to increase crop productivity. A soil incubation study was performed for 60 days using digestate, humic acid, calcium humate and their combinations to investigate the influence on physical, chemical, microbial and enzyme activities of saline soil. Overall, digestate combined with calcium humate followed by humic acid treatments have shown their potency in decreasing the soil pH, electrical conductivity (EC), and sodium ion (Na+) concentration, and increase in potassium ion (K +), calcium ion (Ca 2+), magnesium ion (Mg 2+), mean weight diameter (MWD), soil enzyme activities, microbial biomass carbon (MBC), MBC: microbial biomass nitrogen (MBN) and soil respiration than control. The digestate, humic acid individually and their amalgamation evidenced greater MBN among all the treatments. The digestate alone efficiently improved the soil properties than humic acid and calcium humate individual groups except for the MWD where it is pronounced more in the latter groups. The greater metabolic quotient (qCO2) was observed in control than organic matter amended treatments indicating the stress conditions. The increase in water-extractable organic matter (WEOM) with minimal aromaticity (specific ultraviolet absorbance at 254 nm-Suva 254) in integrated amendments comprising groups, laid the ground reason to improve the properties of saline soil. Therefore, this study concludes that the fusion of fresh and humified substrates could facilitate reclamation.

中文翻译：

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用沼气、腐植酸、腐植酸钙及其混合物修复盐渍土

摘要 改善盐渍土是提高作物生产力的必要条件。使用消化物、腐植酸、腐植酸钙及其组合进行了为期 60 天的土壤孵化研究，以研究对盐渍土物理、化学、微生物和酶活性的影响。总体而言，消化物与腐植酸钙结合，然后进行腐植酸处理，已显示出它们在降低土壤 pH、电导率 (EC) 和钠离子 (Na+) 浓度以及增加钾离子 (K +)、钙离子 (Ca 2+)、镁离子(Mg 2+)、平均重量直径(MWD)、土壤酶活性、微生物生物量碳(MBC)、MBC：微生物生物量氮(MBN)和土壤呼吸比对照。在所有处理中，单独的消化物、腐殖酸及其合并证明了更大的 MBN。与腐植酸和腐植酸钙单独组相比，单独的消化物有效地改善了土壤性质，但 MWD 在后面的组中更为明显。在对照中观察到的代谢商数 (qCO2) 比指示压力条件的有机物质修正处理更大。在包含组的综合改良剂中，具有最小芳香性（254 nm-Suva 254 处的特定紫外吸收）的水可提取有机质 (WEOM) 的增加，为改善盐渍土的性质奠定了基础。因此，本研究得出结论，新鲜和腐殖质基质的融合可以促进开垦。在对照中观察到的代谢商数 (qCO2) 比指示压力条件的有机物质修正处理更大。在包含组的综合改良剂中，具有最小芳香性（254 nm-Suva 254 处的特定紫外线吸收率）的水可提取有机质 (WEOM) 的增加为改善盐渍土的性质奠定了基础。因此，本研究得出结论，新鲜和腐殖质基质的融合可以促进开垦。在对照中观察到的代谢商数 (qCO2) 比指示压力条件的有机物质修正处理更大。在包含组的综合改良剂中，具有最小芳香性（254 nm-Suva 254 处的特定紫外吸收）的水可提取有机质 (WEOM) 的增加，为改善盐渍土的性质奠定了基础。因此，本研究得出结论，新鲜和腐殖质基质的融合可以促进开垦。