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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Dependence of Thermal and Moisture Sensitivity of Soil Organic Carbon Decomposition on Manure Composition in an Inceptisol Under a 5-Year-Old Maize-Wheat Cropping System
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Dependence of Thermal and Moisture Sensitivity of Soil Organic Carbon Decomposition on Manure Composition in an Inceptisol Under a 5-Year-Old Maize-Wheat Cropping System

机译：在5岁的玉米小麦种植系统下，土壤有机碳分解对土壤有机碳分解对粪便组成的依赖性

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摘要

Hydrothermal sensitivity of soil organic carbon decomposition in relation to global climatic changes is of great importance for C cycle in an agro-ecosystem. To assess the sensitivities of SOC as affected by different organic sources and mineral fertilizer in Inceptisol, soil samples from a 5-year-old field experiment were collected from unfertilized control, 100% NPK, vermicompost, compost, and farmyard manure (FM) treated plots and analyzed for total organic C, labile C fractions and C mineralization kinetics by incubating soils at 25 and 35°C temperatures, and 0.33 and 1.0 bar soil moisture for 90 days. Compost and FM-treated plots had ~23 and 22% higher total organic C than 100% NPK plots, respectively. Plots under vermicompost had similar C management index to FM but ~12% higher than compost. At 25°C temperature and 1.0 bar moisture, CO_2 evolutions from vermicompost- and FM-treated plots were ~29 and 11% higher than compost, respectively. Carbon decay rate was invariably higher in control and 100% NPK than organically amended plots. Temperature sensitivity of C was similar at 0.33 bar but different at 1.0 bar among the treatments. Moisture sensitivity of C in organic amended plots was similar at 35°C but different at 25°C, but their moisture sensitivity values were always higher than NPK. It could be concluded that manures with low C/N ratio and high N and P content would reduce C decay rate. Hence, to enhance C sequestration and reduce CO_2 emissions in changing climatic situation, organic manure like vermicompost could be recommended.
机译：与全球气候变化有关的土壤有机碳分解的水热敏感性对于农业生态系统中的C循环非常重要。为了评估SoC的敏感性，受Inceptisol中不同的有机源和矿物肥料的影响，从未受精的对照，100％NPK，蠕动，堆肥和饲养治疗的土壤样品来自一个5岁的野外实验的土壤样本通过在25和35℃的温度下孵育土壤和0.33和1.0巴土壤水分进行90天，通过孵育土壤的总有机C，不稳定C分数和C矿化动力学分析并分析。堆肥和FM处理的图分别具有〜23％至22％，总有机C比100％NPK图。蚯蚓抑制下的情节与FM相似的C管理指数，但比堆肥高约12％。在25℃温度下，1.0巴水分，蚯蚓骨和FM处理的图的CO_2进化分别比堆肥高29％至11％。对照中碳衰减率总是更高的，而不是有机修正的图的100％NPK。 C的温度敏感性在0.33巴中相似，但治疗中的1.0巴特不同。有机修正地块中的C的湿度敏感性在35℃下相似，但在25℃下不同，但它们的水分敏感值总是高于NPK。可以得出结论，具有低C / N比和高N和P含量的粪便将降低C衰减率。因此，为了增强C封存和减少转变气候情况的CO_2排放，可以推荐像蛭数等有机粪肥。

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