ABSTRACT Organic amendments in the soil perform better than synthetic fertilizers in regards to soil fertility and sustainable crop productivity. Experiments were conducted to compare the effects of organic and synthetic fertilizers on soil fertility and wheat (Triticum aestivum L.) productivity. Soil fertility and protein contents of wheat grains (13.2% and 13.3% during 2005–06 and 2006–07, respectively) were improved by organic amendments. However, synthetic fertilizer (at the rate of 150, 100, and 60 kg ha−1 N, P2O5, and K2O, respectively) applications resulted in the maximum grain yield (4.05 and 4.46 t ha−1 during 2005–06 and 2006–07, respectively). The observed and simulated soil organic carbon (SOC) reasonably agreed during RothC model validation (R 2 = 0.99). Economic analysis showed the maximum net profit and relative increase in income ($729 US ha−1 and 309%, respectively) from inorganic treatment. Application of synthetic fertilizers increased grain yield and farm profit while organic manure enhanced grain quality. The RothC model had potential for determining the SOC in organic farming under arid environment.

中文翻译：

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干旱区有机肥和无机肥对土壤有机碳和小麦产量的影响比较

摘要 在土壤肥力和可持续作物生产力方面，土壤中的有机改良剂比合成肥料表现更好。进行了实验以比较有机肥料和合成肥料对土壤肥力和小麦 (Triticum aestivum L.) 生产力的影响。有机改良剂提高了小麦籽粒的土壤肥力和蛋白质含量（2005-06 年和 2006-07 年分别为 13.2% 和 13.3%）。然而，合成肥料（分别以 150、100 和 60 kg ha-1 N、P2O5 和 K2O 的比例）施用导致谷物产量最大（2005-06 年和 2006-1 年期间分别为 4.05 和 4.46 t ha-1） 07，分别）。在 RothC 模型验证期间观察到和模拟的土壤有机碳 (SOC) 合理一致 (R 2 = 0.99)。经济分析显示，无机处理的最大净利润和收入的相对增加（分别为 729 美元美国公顷-1 和 309%）。施用合成肥料提高了粮食产量和农场利润，而有机肥提高了粮食质量。RothC 模型具有确定干旱环境下有机农业 SOC 的潜力。