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首页> 外文期刊>Journal of Agricultural Science >Effects of Flooded Rice Cultivation on Soil Organic Carbon and Active Organic Carbon Content: A Microcosm Experiment
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Effects of Flooded Rice Cultivation on Soil Organic Carbon and Active Organic Carbon Content: A Microcosm Experiment

机译：水稻栽培对土壤有机碳和活性有机碳含量的影响：微观实验

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摘要

Information on carbon (C) dynamics and allocation in plant–soil system is essential to understand the terrestrial C cycle. Our aims were to determine the effects of rice growth on soil organic carbon (SOC), dissolved organic carbon (DOC) and microbial biomass carbon (MBC) content. For this a pot microcosm experiment in growth chamber was conducted with soils planted or unplanted with rice. The experiment lasted for 80 days. The SOC content increased both in unplanted and rice-planted soils over the incubation period. The increasing amount of SOC in rice-planted soil was larger than that of in unplanted soil, indicating that growing rice on bulk soil enhanced the function of soil as a carbon poo1. The DOC enhanced significantly (P 0.05) compared to the zero time (Day 0 (CK)) both in planted soils and unplanted soils during 80 days of incubation. The DOC concentrations in planted soils were much larger than that of unplanted soils, suggesting the release of soluble root exudates from rice roots. However, MBC declined both in unplanted soil and rice-planted soil after incubation for 80 days, compared with the start of experiment. The results suggest that MBC dynamics in rice soil are largely controlled by organic substances released from rice roots.
机译：有关碳（C）动力学和植物土系统的分配信息对于理解地面C循环至关重要。我们的目标是确定水稻生长对土壤有机碳（SOC），溶解有机碳（DOC）和微生物生物质碳（MBC）含量的影响。对于这种生长室的罐微观试验，用稻米种植或漂白的土壤进行。实验持续了80天。在孵化期间，SoC含量在淡化和水稻土壤中增加。水稻土壤中的SOC的增加大于融合土壤中的SoC，表明散装土壤的生长水稻增强了土壤作为碳POO1的功能。与在80天孵化期间，与零时间（第0天（CK））相比，DOC显着增强（P <0.05）。植物土壤中的DOC浓度远大于彩色土壤的浓度，这表明释放来自稻块的可溶性根部渗出物。然而，与实验开始相比，MBC在孵化后融入80天后，MBC均下降了80天。结果表明，水稻土壤中的MBC动力学主要受水稻根释放的有机物质控制。

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