Developing methods to evaluate phenotypic variability in biological nitrification inhibition (BNI) capacity of Brachiaria grasses

Arango, Jacobo; Moreta, Danilo; Núñez, Jonathan; Hartmann, Katharina; Domínguez, Moralba Garcia; Ishitani, Manabu; Miles, John W.; Subbarao, G. V.; Peters, Michael; Rao, Idupulapati M.

doi:10.17138/tgft(2)6-8

Cited by 39 publications

(27 citation statements)

References 3 publications

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“…Roba 1 apparently had a much lower leaf nutrient contents than new BILFA 58. Similar results were reported that Al-tolerant genotypes of maize accumulated higher concentration of Ca and Mg [35], and K [13] than the sensitive genotypes. Mendonca and his co-investigators reported that rice plants exposed to Al had significantly decreased K, Mg, Ca, and P leaf contents, with the tolerant cultivar having suffered less decrease in nutrient leaf nutrient concentrations than the sensitive ones [22].…”

Section: Disscusionsupporting

confidence: 88%

“…Smallholder farmers have very limited capacity to invest in fertilizers or soil conservation measures. As a result, yields are low and many farmers are forced to put fallow and marginal lands into production to meet their food needs [5]. In Ethiopia, common bean is one of the most important cash crops and source of protein for farmers in many lowlands and mid-altitude zones.…”

Section: Introductionmentioning

confidence: 99%

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Yield and leaf nutrient concentrations of common bean genotypes as influenced by aluminium toxicity under acidic soils

Legesse¹,

Dechassa²,

Gebeyehu³

et al. 2017

J biosci agric res

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The study was carried out to assess the effect of different concentrations of exchangeable aluminum on yield and nutrient concentrations in the leaf tissues of two common bean genotypes grown in pots on limed and unlimed acidic soils. Factorial combinations of five aluminum rates and two common bean genotypes were laid out in a completely randomized design with three replications. Yield and leaf nutrient concentrations were markedly affected by aluminium application and the magnitude of this effect depended on the genotype, on the levels of aluminium applied, and liming regimes. On average, the genotypes suffered 10.8% (new BILFA 58) and 24.5% (Roba 1) reductions in grain yield when grown on unlimed soil than limed soil. Lime application increased nutrient content of the leaf (28.5% P, 36.9% Ca, 4.91% K and 14.7% N) and reduced aluminium (56.4%) concentrations in the leaf tissue compared to limed soil. It is concluded that applying aluminum significantly decreased yield and nutrient uptake of both genotypes under both liming regimes.

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Section: Disscusionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Yield and leaf nutrient concentrations of common bean genotypes as influenced by aluminium toxicity under acidic soils

Legesse¹,

Dechassa²,

Gebeyehu³

et al. 2017

J biosci agric res

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“…The forage is palatable and highly nutritious contributing to a significant increase in livestock milk and meat production. Moreover, Urochloa sequesters carbon, enhances N use efficiency through a biological nitrification inhibition process and subsequently reduces greenhouse gas emission and groundwater pollution (Subbarao et al 2009 ; Danilo et al 2014 ; Arango et al 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and population structure of Urochloa grass accessions from Tanzania using simple sequence repeat (SSR) markers

et al. 2018

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Urochloa (syn.— Brachiaria s.s.) is one of the most important tropical forages that transformed livestock industries in Australia and South America. Farmers in Africa are increasingly interested in growing Urochloa to support the burgeoning livestock business, but the lack of cultivars adapted to African environments has been a major challenge. Therefore, this study examines genetic diversity of Tanzanian Urochloa accessions to provide essential information for establishing a Urochloa breeding program in Africa. A total of 36 historical Urochloa accessions initially collected from Tanzania in 1985 were analyzed for genetic variation using 24 SSR markers along with six South American commercial cultivars. These markers detected 407 alleles in the 36 Tanzania accessions and 6 commercial cultivars. Markers were highly informative with an average polymorphic information content of 0.79. The analysis of molecular variance revealed high genetic variation within individual accessions in a species (92%), fixation index of 0.05 and gene flow estimate of 4.77 showed a low genetic differentiation and a high level of gene flow among populations. An unweighted neighbor-joining tree grouped the 36 accessions and six commercial cultivars into three main clusters. The clustering of test accessions did not follow geographical origin. Similarly, population structure analysis grouped the 42 tested genotypes into three major gene pools. The results showed the Urochloa brizantha (A. Rich.) Stapf population has the highest genetic diversity ( I = 0.94) with high utility in the Urochloa breeding and conservation program. As the Urochloa accessions analyzed in this study represented only 3 of 31 regions of Tanzania, further collection and characterization of materials from wider geographical areas are necessary to comprehend the whole Urochloa diversity in Tanzania.

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“…Adaptation to low fertility and acidic soils; tolerance to drought, shade, and flooding; high biomass production potential; ability to accumulate carbon into soils and efficiently use nitrogen are among the important qualities of these grasses. They also can minimize emission of greenhouse gasses and groundwater pollution (Arango et al 2014;Rao 2014;Ghimire et al 2015). Recently, Brachiaria grasses are being used in 'push-pull' technology developed by the ICIPE and its partners.…”

Section: Introductionmentioning

confidence: 99%

Assessments of farmers′ perception and utilization status of Brachiaria grass in selected areas of Ethiopia

et al. 2018

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Adnew W, Tsegay BA, Tassew A, Asmare B. 2018. Assessments of farmers′ perception and utilization status of Brachiaria grass in selected areas of Ethiopia. Biodiversitas 19: 955-966. The study was conducted to evaluate farmers′ perception and utilization status of Brachiaria grass in selected areas of Ethiopia. It was done between April and June 2017. The study employed a multistage sampling method based on the level of distribution of Brachiaria grass as push-pull technology and animal feeds. Respondent farmers were selected purposely based on their practice of Brachiaria grass production and use. A total of 280 household heads, 160 from Oromiya and 120 from Amhara regions, proportionally selected were interviewed. The average land holding per household was 1.79±1.73 hectares and average household size was 6.60±1.99 persons. Identified constraints of forage production were ranked as land shortage (1st), free grazing (2nd), lack and high cost of planting materials (3rd), poor extension service (4th), drought (5th), and lack of awareness (6th). Of the problems, the finding indicated that feed shortage during long dry season (77.0%) is a critical problem. From total respondents, 96.1% faced feed shortage for their livestock at least once a year. Major constraints to improve forage production were ranked as land shortage, unmanaged grazing, lack of grass planting materials, poor extension service and drought, orderly. All respondents (100%) from Oromiya and 52.1% of respondents from Amhara have got training about use of Brachiaria grass. Majority of the respondents (97.3%) believed that Brachiaria grass is much productive compared to other grasses. Overall, the study showed that training to farmers and adequate provision of extension services on the use of Brachiaria grass are necessary to exploit the potential of the grass in the study districts as well as the country at large.

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Developing methods to evaluate phenotypic variability in biological nitrification inhibition (BNI) capacity of Brachiaria grasses

Cited by 39 publications

References 3 publications

Yield and leaf nutrient concentrations of common bean genotypes as influenced by aluminium toxicity under acidic soils

Yield and leaf nutrient concentrations of common bean genotypes as influenced by aluminium toxicity under acidic soils

Genetic diversity and population structure of Urochloa grass accessions from Tanzania using simple sequence repeat (SSR) markers

Assessments of farmers′ perception and utilization status of Brachiaria grass in selected areas of Ethiopia

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