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    Wyświetlanie 1-2 z 2
    Tytuł:
    Evaluation of Different Commercial Rhizobial Strains on Soybean (Glycine max L.) Yield at Pawe District, Northwestern Ethiopia
    Autorzy:
    Merkeb, Fitsum
    Redi, Musefa
    Gebremedhin, Wubayehu
    Powiązania:
    https://bibliotekanauki.pl/articles/1192590.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Commercial Rhizobial Strain
    Glycine max L.
    Soybean
    Inoculation
    Nodule
    Opis:
    Two experiments were conducted during 2010 and 2011 main cropping seasons under different farmer fields at Pawe District of Northwestern Ethiopia in order to evaluate different commercially produced microbial inoculants, referred to as commercial rhizobial strains, on soybean yield. The first experiment was conducted with the aim of evaluating four commercial rhizobial strains (Legume fix, TSBF-531, TSBF-442 and MAR-1495) on soybean yield, while the second experiment conducted with the aim of evaluating and selecting the best rhizobial strain from the two rhizobial strains (Legume fix and MAR-1495). Non-inoculated soybean with and without the recommended rate (RR) of nitrogen (N) fertilizer treatments also included in the experiments. Treatments were arranged in a single replicate per field. Recommended rate of phosphorous (P) fertilizer was applied uniformly to all treatments. The two experiments analysis of variance indicated that there was significant difference (P < 0.05) among treatments in number of nodules, nodule weight, biomass yield and grain yield of soybean. Accordingly, the first experiment result indicated that the highest number of nodules, nodule weight, biomass yield and grain yield were recorded by using rhizobial strains of legume fix and MAR-1495. The second experiment result revealed that rhizobial strain MAR-1495 resulted consistent and highest number of nodules, nodule weight, biomass yield and grain yield of soybean. The increment in grain yield over the un-inoculated control, legume fix and full RR of N fertilized treatments recorded by MAR-1495 was 25.5, 9.7 and 9.9%, respectively. Moreover, inoculation of soybean seeds with rhizobial strain MAR-1495 also resulted to higher protein content in soybean plant tissue. Therefore, this study recommends use of the most suitable commercial rhizobial strain MAR-1495 for the study area to inoculate seeds before sowing for the production of soybean crop.
    Źródło:
    World Scientific News; 2016, 55; 15-26
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Critical Level of Extractable Phosphorus for Maize (Zea mays L.) at Metekel Zone, Northwestern Ethiopia
    Autorzy:
    Redi, Musefa
    Gebremedhin, Wubayehu
    Merkeb, Fitsum
    Yimam, Mohamed
    Powiązania:
    https://bibliotekanauki.pl/articles/1191209.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Critical level
    fertilizer
    phosphorous
    maize
    soil test
    extraction methods
    Opis:
    Fertilizer recommendation based on choosing an effective soil nutrient extractants and calibrating soil tests against yield responses to applied nutrient has been little used in Ethiopia. An experiment was conducted during 2009, 2010 and 2011 cropping seasons in 35 different farmer fields from five Districts of Metekel zone. Six levels of phosphorus (0, 10, 20, 30, 40 and 50 kg ha-1) arranged in Randomized Complete Block Design (RCBD) with three replicates were used to determine the critical level of phosphorus (P) for maize and to compare Bray II, Olsen and Mehlich III P extraction methods. Grain yield of maize responded positively and significantly to P fertilizer application of the study area. Compared with the control, grain yield increased 19.8 to 35.3% by applications of P fertilizers. Extractable P concentration extracted after three weeks of planting by using three extraction methods were significantly differed among P fertilizer rates. Using the Cate and Nelson graphical method, the critical levels of soil extractable P were 12, 8 and 10 mg P kg-1 soil for Bray II, Olsen and Mehilich III extraction methods, respectively. Results shows that at values less than these critical levels of extractable P, P fertilizers should be applied to increase maize yield. The Bray II P was more correlated (r = 0.38) with relative maize grain yield than and Olsen and Mehlich III extraction methods. In addition, the quantities of P extracted by the three extractants were in the following order: Bray II > Mehlich III > Olsen P extraction method. The result indicated that Bray II was found to be the most suitable as soil testing method for estimating extractable P in the study area.
    Źródło:
    World Scientific News; 2016, 54; 14-26
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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