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首页> 外文会议>World Congress of Soil Science >Winter cover crops increase soil carbon and nitrogen cycling processes and microbial functional diversity
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Winter cover crops increase soil carbon and nitrogen cycling processes and microbial functional diversity

机译：冬季覆盖作物增加土壤碳和氮循环过程和微生物功能多样性

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Winter cover crops are not only one of effective agricultural management practices to control weeds but also can improve soil fertility, resulting in increasing crop productions. Up to now, however, little is known about information on how much of soil soluble organic carbon (C) incorporates into the soils applied with winter cover crops, which is a prerequisite to design strategies that improve C sequestration in agricultural ecosystems. The aims of this study were to: (1) assess the effects of winter cover crops on soluble organic carbon (SOC) pools using different extraction methods (KC1 extractable organic C; microbial biomass) and microbial community functional diversity, and (2) quantify how much of the potentially mineralizable organic C pools (C_0) incorporates into the soils and associated half-life of SOC remaining under seven cover crops and nil-crop control (CK) in temperate agricultural soils of southern Australia. Cover crop treatments are cereal rye, wheat, saia oats, vetch, field peas, mustard and the mixture of cereal rye and vetch. Results showed that the CK treatment had higher soil moisture content and lower soluble organic nitrogen (SON) compared to the cover crop treatments. Among the cover crop treatments, there was significantly higher SON in the wheat, oats and vetch treatments than in the other treatments. The oats treatment had the highest amount of cumulative CO_2-C than any other treatments over one-month incubation experiment. An exponential regression approach for Cmineralization was used to estimate C_G and soil samples under the cover crops can be divided into four groups depending on C_0. The principal component analysis of the MicroResp? profiles showed that the CK treatment was significantly different from the cover crop treatments. The cover crop treatments with wheat, vetch and peas as well as mustard form a cluster which was significantly different from the other clusters, In addition, the vetch, field peas and mustard treatments showed higher Shamion diversity H and Evenness (E) and Simpson diversity H compared to the other cover crop treatments with the lowest Shannon H and E at CK. In conclusion, overall, the vetch and field peas as well as wheat winter cover crop may be better management practices for agricultural ecosystems in southern Australia.
机译：冬季覆盖作物不仅是控制杂草的有效农业管理实践之一，还可以提高土壤肥力，导致作物生产增加。然而，截至目前，关于有关土壤可溶性有机碳（c）的信息少于含有冬季覆盖作物的土壤的信息，这是一种更加设计农业生态系统中依赖性的先决条件的先决条件。本研究的目的是：（1）使用不同的提取方法评估冬季覆盖作物对可溶性有机碳（SOC）池的影响（KC1可提取的有机C;微生物生物量）和微生物群落功能多样性，以及（2）量化在澳大利亚南部气温农业土壤中，剩下的七种封面作物和尼尔 - 作物控制（CK）中剩余的SOC的土壤和相关半衰期中的含量有多少。覆盖作物治疗是谷物黑麦，小麦，萨燕麦，瓦茨，野豌豆，芥末和谷物黑麦和腐败的混合物。结果表明，与覆盖作物治疗相比，CK处理具有较高的土壤水分含量和低可溶性有机氮（儿子）。在涵盖作物治疗中，小麦，燕麦和虫胶处理中的儿子显着高于其他治疗。燕麦处理量最高的累积CO_2-C比一个月内孵化实验的任何其他治疗。用于估计Cm碱化的指数回归方法估计C_G和覆盖作物下的土壤样品可以根据C_0分成四组。 Microresp的主要成分分析？曲线显示CK治疗与覆盖作物治疗显着不同。具有小麦，拔蚀和豌豆的覆盖作物处理以及芥末形成与其他簇有明显不同的簇，此外，取景，野豌豆和芥末治疗表现出更高的沙牛多样性H和均匀（E）和辛普森多样性H比较其他覆盖作物治疗，在CK中具有最低的Shannon H和E.总之，总体而言，朱卫生冬季植物以及小麦冬季覆盖作物可能是澳大利亚南部农业生态系统的更好管理实践。

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