Salinity in soil and irrigation water is a major environmental stress in arid and semi-arid regions affecting soil organic carbon and its pools. A pot experiment was carried out in India to investigate distribution of soil carbon and its dynamic pools and nutrients under saline water irrigation in seed spice crops. Soil samples were analyzed for physicochemical properties (pH_1:2, EC_1:2), soil carbon (inorganic and organic), its pools (vey labile, labile, less labile and non-labile), and soil nutrients. Soil pH and EC varied between 7.70–8.72 and 0.45–8.25 dS m⁻¹, respectively. Soil organic carbon and total soil carbon were higher by 15.2 and 22.4% with alternate application of saline and fresh water compared with continuous application of saline or fresh water and increased the less labile and non-labile carbon pools. Alternate application of saline and fresh water increased both the active and passive pools of carbon. Calcium carbonate and inorganic carbon were decreased by 35% with the continuous application of saline and fresh water. Similarly, alternate application of saline and fresh water increased carbon stock, carbon management index, and carbon pool index compared with sole application of fresh or saline water. Available nitrogen, phosphorous, and potassium varied from 310 to 629 kg ha⁻¹, 39 to 87 kg ha⁻¹, and 87 to 430 kg ha⁻¹, respectively. Micronutrients were found to be highest with alternate application of saline and fresh water. Zinc, iron, manganese, and copper varied from 2.66 to 5.24, 2.64 to 6.67, 4.60 to 13.07, and 1.36 to 3.66 mg kg⁻¹ soil, respectively. Alternate application of saline and fresh water helps in the build-up of soil carbon while maintaining the soil nutrient pools compared to sole application of saline or fresh water application.

土壤和灌溉水中的盐分是干旱和半干旱地区的主要环境压力，影响土壤有机碳及其库。在印度进行了盆栽试验，以研究盐水在种子香料作物中灌溉下土壤碳及其动态库和养分的分布。分析了土壤样品的理化特性（pH _1：2，EC _1：2），土壤碳（无机和有机碳），其碳库（不稳定，不稳定，较不稳定和非不稳定）以及土壤养分。土壤pH和EC值在7.70-8.72和0.45-8.25 dS m ^-1之间变化， 分别。与连续施用盐水或淡水相比，交替施用盐水和淡水的土壤有机碳和总土壤碳分别增加了15.2和22.4％，增加了不稳定和非不稳定的碳库。盐水和淡水的交替使用增加了主动和被动碳库。连续施用盐水和淡水可使碳酸钙和无机碳减少35％。同样，与单独使用淡水或盐水相比，交替使用盐水和淡水可以增加碳储量，碳管理指数和碳库指数。可用氮，磷和钾的变化范围为310至629 kg ha ^-1、39至87 kg ha ^-1和87至430 kg ha^-1。发现交替施用盐水和淡水时微量营养素含量最高。锌，铁，锰和铜分别从2.66至5.24、2.64至6.67、4.60至13.07和1.36至3.66 mg kg ^-1土壤变化。与单独施用盐水或淡水相比，交替施用盐水和淡水有助于增加土壤中的碳，同时保持土壤养分库。