库兹巴斯克麦罗沃地区微生物群对春大麦生长和发育的影响

L. Asyakina, О. А. Isachkova, D. Kolpakova, Е. Е. Borodina, V. Y. Boger, A. Prosekov
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引用次数: 0

摘要

克麦罗沃州是一个极端农耕地区,因此需要开发有效的生物方法来提高适应这些条件的栽培植物的产量。当前工作的目的是找到与春大麦相关的植物生长刺激微生物,并在其基础上形成微生物联合体,进行田间试验。研究对象是在克麦罗沃州选取的春大麦种子、从种子中分离出的生长刺激微生物以及在其基础上形成的联合体。研究期间,分离并测试了 9 种细菌分离物合成生长刺激物质(激肽和吲哚-3-乙酸)的能力。最后选出了三株指标最好的菌株 SHv-2、SHv-5、SHv-6 进行进一步研究。研究发现,这些菌株具有固氮能力(SHv-2 - 800 µg/ml;SHv-5 - 210 µg/ml;SHv-6 - 840 µg/ml)。此外,菌株还具有溶解磷酸盐的能力(SHv-2 - 2.53;SHv-5 - 1.25;SHv-6 - 3.33)。通过对培养、形态和生化特性的研究,可以确定这些菌株为:SHv-2 - Pantoea allii;SHv-5 - Raoultella ornithinolytica;SHv-6 - Pantoea ananatis。在这些微生物的基础上,产生了各种变异的微生物联合体,这些联合体也因其产生生长促进物质和固氮的能力而受到重视。分别由 Pantoea allii、Raoultella ornithinolytica 和 Pantoea ananatis 按 1:1:3 的比例组成的联合体 MC-7 在所研究的参数方面表现出最大的活性。田间试验表明,该联合菌株能成功提高春大麦的产量。尽管天气条件异常(缺乏丰收的降雨),但与对照组相比,经联合体处理的作物生长速度有所提高。目前已确定了最有前途的春大麦加工方案,即方案 3 和方案 4。
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The effect of a microbial consortium on spring barley growth and development in the Kemerovo region, Kuzbass
The Kemerovo region is a region of extreme farming, and therefore requires the development of effective biological methods for improving productivity of cultivated plants adapted to these conditions. The purpose of the current work was to find plant growth-stimulating microorganisms associated with spring barley, as well as to form a microbial consortium on their basis and to conduct field trial. The objects of the study were spring barley seeds selected in the Kemerovo region, growth-stimulating microorganisms isolated from them, and consortia formed on their basis. During the study, there were isolated and tested 9 bacterial isolates for their ability to synthesize growth-stimulating substances (kinetin and indolyl-3-acetic acid). There were selected three strains with the best indicators SHv-2, SHv-5, SHv-6 for further studies. There has been found that the strains are capable of fixing nitrogen (SHv-2 – 800 µg/ml; SHv-5 – 210 µg/ml; SHv-6 – 840 µg/ml). There was also seen an ability to solubilize phosphates (SHv-2 – 2.53; SHv-5 – 1.25; SHv-6 – 3.33). The study of cultural, morphological and biochemical properties made it possible to identify such strains as SHv-2 – Pantoea allii; SHv-5 – Raoultella ornithinolytica; SHv-6 – Pantoea ananatis. Based on these microorganisms, there were made various variants of microbial consortia, which were also valued for their ability to produce growth-promoting substances and fix nitrogen. Consortium MC-7 composed with Pantoea allii, Raoultella ornithinolytica, Pantoea ananatis in a ratio of 1:1:3, respectively, showed maximum activity in terms of the studied parameters. Field trials of this consortium have shown that it successfully improves spring barley productivity. Despite abnormal weather conditions (lack of productive rains), there was an increase in the growth of crops treated by the consortium in comparison with control options. There have been established the most promising options for processing spring barley, options 3 and 4.
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