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首页> 外文期刊>Acta Agriculturae Scandinavica. Section B, Soil and Plant Science >Assessing biogas digestate, pot ale, wood ash and rockdust as soil amendments: effects on soil chemistry and microbial community composition
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Assessing biogas digestate, pot ale, wood ash and rockdust as soil amendments: effects on soil chemistry and microbial community composition

机译：评估沼气消化物，大锅啤酒，木灰和岩粉作为土壤改良剂：对土壤化学和微生物群落组成的影响

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Applying by-products as soil amendments to agricultural systems is growing in popularity. We aimed to assess the efficacy of some contemporary by-products to provide nutrients to crops as well as the potential harm of adding toxic elements to the environment. Four different by-products widely available in Northern Europe were tested for their effects on two nutrient-poor agricultural soils in terms of increasing available macro- and micro-nutrients as well as toxic elements. Assessing soil microbial community as a sensitive tool for evaluating soil quality was conducted with the focus on microbial activity, carbon metabolism and on Rhizobium/Agrobacterium. Wood ash increased pH and Ca-EDTA, K-EDTA and Mg-EDTA in the soils. The only increase in EDTA-extractable micronutrients in the soils was observed by applying pot ale, increasing Cu. None of the amendments increased the availability of Pb and Cd in the soils. Soils amended with the by-products thus remained similar to the unamended control but were quite different from fully mineral fertilised soils. There were no detectable adverse effects on the physiological and genetic profiles of microbial communities. The by-products were moderately beneficial and did not change the soil microbial community as much as the fully fertilised treatment with mineral fertilisers. Changes in the microbial community profiles were probably due to direct effects on microbes limited by K, Ca and N as opposed to indirect effects on plant growth. This is potentially significant in understanding how to improve impoverished and marginal soils as microbial activity affects many other ecosystem functions.
机译：将副产品作为土壤改良剂应用到农业系统中的做法越来越流行。我们旨在评估一些当代副产品为作物提供营养的功效以及向环境中添加有毒元素的潜在危害。测试了在北欧广泛使用的四种不同副产物对两种营养不良的农业土壤的影响，方法是增加可用的大量和微量营养素以及有毒元素。评估土壤微生物群落作为评估土壤质量的敏感工具，重点是微生物活性，碳代谢和根瘤菌/土壤杆菌。木灰增加了土壤中的pH值和Ca-EDTA，K-EDTA和Mg-EDTA。施用大麦粉，增加铜可观察到土壤中EDTA可萃取微量营养素的唯一增加。这些修正案均未增加土壤中铅和镉的利用率。因此，用副产物修正的土壤与未修正的对照保持相似，但与完全矿物肥料的土壤完全不同。对微生物群落的生理和遗传特性没有可检测到的不利影响。副产品适度有益，并且不会像使用矿物肥料进行全面施肥处理那样改变土壤微生物群落。微生物群落特征的变化可能是由于对微生物的直接影响受到钾，钙和氮的限制，而不是对植物生长的间接影响。这对于理解如何改善贫困和边缘土壤具有重要的意义，因为微生物活动会影响许多其他生态系统功能。

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