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Efficacy of Peat and Liquid Inoculant Formulations of Bradyrhizobium japonicum Strain WB74 on Growth, Yield and Nitrogen Concentration of Soybean ( Glycine max L.)

机译:泥炭和液体植物菌株WB74对大豆生长,产率和氮浓度(Glycine Max L.)的疗效(Glycine Max L.)的疗效

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South African soils generally lack native Bradyrhizobium strains that nodulate and fix atmospheric nitrogen (N2) in soybeans (Glycine max L.). It is therefore very important to inoculate soybeans with products that contain effective Bradyrhizobium strains as active ingredients. In this study, a field experiment was conducted on two bioclimatic zones in South Africa during the 2019/2020 season to assess the effect of Bradyrhizobium japonicum strain WB74 inoculant formulation on nitrogen fixation, growth and yield improvement in soybeans. The first bioclimatic zone was characterized by a sandy clay loam soil, whereas the second bioclimatic zone has a sandy loam soil. The results showed that inoculation of soybeans with both peat and liquid formulations of Bradyrhizobium japonicum WB74 increased nitrogen uptake, which resulted in yield increase. The amount of N fixed was measured as 15N isotopes and increased with all treatments compared to the uninoculated control in both liquid and peat inoculant formulations. In bioclimatic zone A, slightly better results were obtained using the liquid formulation (1.79 t ha?1 for liquid compared to 1.75 t ha?1 for peat treatments), while peat formulations performed better in bioclimatic zone B (1.75 t ha?1 for peat compared to 1.71 t ha?1 for liquid treatments). In both areas higher yields were obtained with the formulations used in this study compared to the registered standards (treatment T3). The findings in this study provide vital information in the development and application of formulated microbial inoculants for sustainable agriculture in South Africa.
机译:南非土壤通常缺乏原生的Bradyro ocium菌株,其在大豆(甘氨酸Max L.)中呈现和固定大气氮(N2)。因此,将大豆与含有有效的Bradyrhizobium菌株作为活性成分的产品为接种大豆是非常重要的。在这项研究中,在2019/2020赛季中,在南非的两种生物恐星区进行了田间实验,以评估Bradyrhizobium菌株WB74孕育物体对大豆氮固定,生长和产量改善的影响。第一个生物纤维素区的特征在于含有含沙粘土壤土的土壤,而第二种生物融合区具有含沙土的砂土土壤。结果表明,与泥炭和液体制剂的大豆和液体制剂的接种增加了氮素摄取,导致产量增加。与液体和泥炭孕产剂配方中的未致力化对照相比,测量为15N同位素的N固定的量,并随着所有处理而增加。在生物耦合区域A中,使用液体制剂获得稍好的结果(1.79 T ha = 1,用于液体的液体处理,而泥炭配方在生物胆管区B中表现较好(1.75 t ha?1泥炭与1.71 t ha?1相比液体处理)。与本研究中使用的配方与注册标准(治疗T3)相比,在这两个方面获得了更高的产率。本研究的研究结果为南非可持续农业的制定和应用提供了重要信息。

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