The salt‐affected soils cover vast area in more than 100 countries and increasingly decrease the arable land. It may lead to the global food insecurity that is needed to be solved urgently. Concurrently, these degraded areas are suitable for inland saline aquaculture on the conditions of improvement in sediment characteristics. In this connection, an experiment was conducted for 60 days to study changes in physicochemical properties of inland saline aquaculture pond sediments through biochar application. The biochar prepared from dried sugarcane bagasse at 500°C with 33% biomass recovery was characterized for its physicochemical properties and applied over surface and by mixing with the sediment. There was a significant (p < .05) increase in organic carbon (3.82%), available‐P (2.13%), available‐K (18%), Ca (5.62%), Mg (14%) and water‐holding capacity (1.8 times), and decrease in pH (0.41 unit), EC (17%) and bulk density (7%) when biochar (18 t/ha) was mixed with sediment (T2 treatment), whereas increase and decrease in CEC (59%) and available‐N (1.01 times), respectively, when biochar (18 t/ha) were applied over sediment surface (T4 treatment). Thus, mixing of sugarcane bagasse biochar with sediment at 18 t/ha is recommended for the improvement of soil characteristics in saline soils for aquaculture through this study. Furthermore, the SEM and FT‐IR analysis of treatments showed that sediment aggregation and functional group characteristics improved over a short period of incubation along with microbial biomass.

中文翻译：

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甘蔗渣生物炭：适用于内陆水产养殖土壤的改良剂

受盐影响的土壤覆盖了100多个国家的广大地区，并且耕地面积日益减少。这可能会导致需要紧急解决的全球粮食不安全状况。同时，这些退化地区在改善沉积物特征的条件下，适合内陆盐水养殖。在这方面，进行了为期60天的实验，以研究通过生物炭施用内陆盐水养殖池塘沉积物的理化特性的变化。从干燥的甘蔗渣在500°C下提取生物质，其生物质回收率为33％，对其生物化学特性进行了表征，并应用于表面，并与沉积物混合。有一个显著（p <.05），有机碳（3.82％），有效磷（2.13％），有效钾（18％），钙（5.62％），镁（14％）和持水量（1.8倍）的增加，当生物炭（18吨/公顷）与沉积物混合（T2处理）时，pH（0.41单位），EC（17％）和堆积密度（7％）降低，而CEC（59％）和可利用的CEC升高和降低将生物炭（18吨/公顷）施用到沉积物表面（T4处理）时，分别为-N（1.01倍）。因此，通过这项研究，建议将甘蔗渣生物炭与沉积物以18吨/公顷的比例混合，以改善咸水养殖土壤的土壤特性。此外，对处理的SEM和FT-IR分析表明，在孵化过程中，随着微生物量的增加，沉积物的聚集和官能团特性得到改善。