Switchgrass (Panicum virgatum L.) cultivars have similar impacts on soil carbon and nitrogen stocks and microbial function

Switchgrass (Panicum virgatum L.) cultivars have similar impacts on soil carbon and nitrogen stocks and microbial function
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柳枝稷(Panicum virgatum L.)品种对土壤碳和氮储量以及微生物功能具有类似的影响

DOI:
10.1111/gcbb.13125
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发表时间:
2024
期刊:
影响因子:
5.6
通讯作者:
Robertson, G. Philip
Robertson, G. Philip
中科院分区:
工程技术2区
文献类型:
--
作者:
Mosier, Samantha;Kelly, Lauren;Ozlu, Ekrem;Robertson, G. Philip

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柳枝稷生物燃料生产有可能在不适合传统农业的土地上产生合理的产量。我们评估了9个柳枝稷品种代表低地和高地生态型生长了11年,在美国上中西部的地下差异,土壤碳和氮储量,土壤有机质组分,并站在1米深的根生物量。我们还通过在表层土壤(0-10 cm深度)中进行群落水平的生理分析,比较了潜在的氮矿化和碳基质使用。平均产量和根系生物量在品种和生态类型之间存在差异,但我们没有发现与品种相关的土壤碳和氮储量,颗粒和矿物相关的土壤有机质组分的分布,也没有潜在的氮矿化或微生物群落水平的生理特征。这些性状没有品种之间的差异表明,柳枝稷下的土壤碳和氮的收益可能是强大的品种差异,并在这一点上没有太大的影响育种工作。
Switchgrass (Panicum virgatumL.) production for biofuel has the potential to produce reasonable yields on lands not suited for conventional agriculture. We assessed nine switchgrass cultivars representing lowland and upland ecotypes grown for 11 years at a site in the upper Midwest USA for belowground differences in soil carbon and nitrogen stocks, soil organic matter fractions, and standing root biomass to 1 m depth. We also compared potential nitrogen mineralization and carbon substrate use through community‐level physiological profiling in surface soils (0–10 cm depth). Average yields and standing root biomass differed among cultivars and between ecotypes, but we found no significant cultivar‐related impacts on soil carbon and nitrogen stocks, on the distribution of particulate and mineral‐associated soil organic matter fractions, nor on potential nitrogen mineralization or microbial community‐level physiological profiles. That these traits did not differ among cultivars suggests that soil carbon and nitrogen gains under switchgrass are likely to be robust with respect to cultivar differences, and to this point not much affected by breeding efforts.
DOI: 10.1094/pbiomes-12-19-0069-fi
发表时间: 2020-08
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发表时间: 2011
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