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    Tytuł:
    Response of soybean to inoculation with Bradyhrizobia spp. strains: effect on root nodulation, yield and residual soil nitrogen
    Autorzy:
    Getu, Abebe
    Gashu, Kindu
    Kerebih, Bitewulign
    Wale, Sefinew
    Getaneh, Dessalegn
    Powiązania:
    https://bibliotekanauki.pl/articles/1062932.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Bradyrhizobium japonicum
    Glycine max
    Jabitehnan
    bradyrhizobia
    fertilizer
    inoculation
    soybean
    strain
    Opis:
    Soybean (Glycine max (L.) Merrill) is an exotic crop to Ethiopia. Hence, inoculation with effective Bradyrhizobia spp. is crucial to improve its productivity. This study was therefore conducted in West Gojam Zone of Amhara Region in 2015 and 2016 aimed at evaluating the effect of bradyrhizobia strains (MAR-1495, SB-12 and TAL-379) with and without phosphorus fertilizer (23 kg P2O5 ha-1) on root nodulation and yield of soybean, and on residual soil nitrogen. The treatments were laid in randomized complete block design including a satellite control treatment with three replications. Effect of the use of rhizobia strains and P fertilizer on nodulation, yield and yield components of soybean was found statistically significant (P<0.05). The highest grain and dry matter yields of 2.7 and 6.4 t ha-1, respectively, were obtained from MAR-1495+P which was statistically at par with the yields obtained from MAR-1495 alone. A grain yield advantage of 30.8% over the control treatment was found from the use of MAR-1495 alone. Similarly, the maximum number of effective nodules (14.9) per plant was recorded from MAR-1495+P which was statistically at par with the number of effective nodules (11.6) per plant counted from MAR-1495 inoculated treatment. The highest residual soil N exceeding the control treatment by 0.029% (0.29 g total N per kg soil) was obtained from MAR-1495 alone. Therefore, inoculation with the strain MAR-1495 was found the most effective for improved soybean production in the study district and similar agroecologies.
    Źródło:
    World Scientific News; 2019, 124, 2; 94-106
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of P and K fertilizer recommendation for faba bean in Ethiopia: the case for Sekela District
    Autorzy:
    Getu, Abebe
    Gashu, Kindu
    Mengie, Yechale
    Agumas, Birhanu
    Abewa, Anteneh
    Alemayehu, Amlaku
    Powiązania:
    https://bibliotekanauki.pl/articles/1031495.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Sekela
    Vicia faba
    faba bean
    fertilizer
    phosphorus
    rhizobia inoculation
    Opis:
    Ethiopian soils are recently reported to exhibit multi-nutrient deficiency. Legume crops can satisfy their nitrogen (N) demand through biological N fixation. However, other nutrients should be supplied in optimal amount in the form of fertilizers. Thus, this study was conducted to evaluate the response of faba bean to different levels of phosphorus (P) and potassium (K) fertilizers. The study was conducted in Sekela district of West Gojam Zone of Amhara region from 2014 to 2015. Four levels of K (0, 12, 24 and 36 K2O kg ha-1) and five levels of P (0, 23, 46, 69 and 92 kg P2O5 ha-1) in the first year and four levels of P (0, 23, 46 and 69 kg P2O5 ha-1) in the second and third years were combined in incomplete factorial arrangement with a satellite treatment comprising S, Zn, Mg and B. Except the control treatment (non-fertilized), all the rest treatments were inoculated with FB-4 in the first year and EAL-110 rhizobia bacteria in the second and third experimental years. The treatments were laid in a randomized complete block design with three replications. P, K, S and Mg fertilizers were applied as basal application, while, the micronutrients Zn and B were applied as foliar application 45 days after planting. Significant (P<0.05) yield response to the addition of P and K fertilizers was recorded in two experimental years. In the first experimental year, the highest grain of 3.2 t ha-1 was obtained from application of 92/24 P2O5/K2O kg ha-1 statistically at par with 46/0 P2O5/K2O kg ha-1. While, in the second experimental year, the maximum grain yield of 4.3 t ha-1 was obtained from application of 46/0 P2O5/K2O kg ha-1. The partial budget analysis result showed that the maximum marginal rates of return of 611 and 463.5% and maximum net economic returns of 1768.1$ and 2975.2$ were obtained from application of 46 kg P2O5 ha-1 in the first and second experimental years, respectively. Thus, the combined use of the rhizobia strains FB-4 and EAL-110 with 46 kg P2O5 ha-1 is recommended to improve productivity and economic return of faba bean production in Sekela district and similar agro-ecologies.
    Źródło:
    World Scientific News; 2020, 142; 169-179
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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