Open Access Original Research Article

Dry Matter Yield and Quality of Two Temperate and Two Tropical Forage Legume Hays Harvested at Early-Flowering in Jos, Nigeria

T. T. Akpensuen, J. T. Amodu, R. J. Tanko, J. S. Luka, O. A. T. Namo, M. R. Hassan

Asian Journal of Advances in Agricultural Research, Page 1-12
DOI: 10.9734/ajaar/2019/v9i330002

The study was designed to evaluate the dry matter yield and quality of two temperate (T. Pratense and T. repens) and two tropical forage legumes (S. guianensis and C.molle) harvested at early-flowering stage for hay in a cool tropical environment of Vom, Jos, Plateau State, Nigeria. The legumes were planted in the month of June, 2015 and 2016 in a 4 x 4 Latin Square Design with four replicates in plots measuring 5 m x 3 m. The forages were harvested at early-flowering stage for yield components, dry matter yield and nutrient quality evaluation.

The result showed that C. molle was significantly (P<0.01) higher in height in the two seasons compared to the other legumes. Number of leaves per plant was higher (P<0.01) significantly in S. guianensis (125.00) in 2015 whereas, T. repens had higher (P<0.01) value (187.25) in 2016 cropping season.  Stylosanthes guianensis produced significantly (P<0.01) higher dry matter with 10.42 t ha-1 in 2015, while the dry matter yield obtained from C. molle (2.90 t ha-1) was the highest in 2016. Trifolium pratense and T. repens were scored excellent grade, while Stylosanthes guianensis and Centrosema molle were scored good in quality. Crude protein content was significantly (P<0.01) higher in T. repens (18.38%) compared to T. pratense (16.50 %), whereas S. guianensis produced the least value of 13.83%. The crude fibre content of the of the forage materials on the other hand was significantly higher (P<0.0I) in S. guianensis (37.29 %) compared to the other forage legumes.

The temperate forage legumes in this trial were higher in nutrient content, but lower in dry matter yield. Therefore, the forage crops may serve as better supplementary feeds for livestock feeding especially during the dry season.

Open Access Original Research Article

Effect of Ambient Temperature on the Performance of Shaver Brown Hens in Hot Humid Environment

A. O. Ani, M. O. Okpara

Asian Journal of Advances in Agricultural Research, Page 1-10
DOI: 10.9734/ajaar/2019/v9i330007

The effect of temperature on the performance of Shaver brown hens in the hot humid environment was investigated using seventy-five Shaver brown hens in their 14th week of lay. Each hen was housed in individual battery cage and fed daily with 125 g of commercial layers mash containing 16.5% crude protein, 2650 kcal/kg metabolizable energy, 4% crude fat, 6.5% crude fibre, 3.6% calcium and 0.4% phosphorus for 10 weeks. Water was supplied ad libitum to the birds. Eggs were collected daily and recorded for each hen. Data were collected on average daily feed intake(ADFI),  egg weight, eggshell weight, egg shell thickness, egg shape index, albumin height, yolk height, albumin index, yolk index, haugh unit and hen day egg production. Results showed that ADFI, hen day egg production, egg shape index, albumin height, yolk height, yolk index and Haugh units were significantly (P < 0.05) decreased with increase in ambient temperature. However, high ambient temperature did not have significant (P > 0.05) effect on egg weight, eggshell thickness and albumin index. Based on the results obtained in the study, it was concluded that ambient temperature had an effect on the performance of Shaver brown hens in the humid tropics.

Open Access Original Research Article

Determinants of China’s Rice Export after WTO Accession: A Gravity Model Analysis

Le Thi Bich Lien, Luo Xiao Feng, Xue Long Fei

Asian Journal of Advances in Agricultural Research, Page 1-12
DOI: 10.9734/ajaar/2019/v9i330008

This paper applied the commodity-specific gravity approach to investigate the influenced factors to China’s rice export to its major trading partners after World Trade Organization (WTO) accession over 2001- 2014 period. The gravity model was augmented with factors from both exporter’s and importer’s sides. The empirical results revealed that, excepting distance, the remained variables including Gross Domestic Product, population, income, exchange rate, production and price had statistical significance and correlated with the total export as hypothesized. Among these variables, price and production reported as the best predictors, explaining 81.30% and 80.54% variation in China’s total export, respectively. Moreover, the determinants of China’s rice export highly depended on the components of exporter side than that of importer sides. This study results provide the statistical and practical significance for trade policy formulation to promote China’s rice exports in world markets.

Open Access Original Research Article

Yield of Okra (Abelmoschus esculentus L. Moench) Varieties as Influenced by the Application of Cow Dung and Poultry Manure in Jega, Kebbi State, Nigeria

A. Muhammad, H. Y. Sanda, U. Aliyu, A. Tijjani, M. Adamu

Asian Journal of Advances in Agricultural Research, Page 1-9
DOI: 10.9734/ajaar/2019/v9i330009

Field trials were conducted at the Fadama Teaching and Research farm Jega, Kebbi state University of Science and Technology Aliero, during the 2017 and 2018 dry seasons, to study the Yield of Okra (Abelmoschus esculentus L. Moench) Varieties as Influenced by Cow Dung and Poultry Manure Application. The treatments consisted of two (2) manure levels (Cow dung 12 t ha-1 and Poultry manure 6.6 t ha-1); each were designed to supply 120 kg N ha-1 using cow dung and poultry manure and three (3) varieties of okra namely LD88, NHAE47-4 and Dogo variety which were laid out in a Randomized Complete Block Design (RCBD) and replicated three times. The results obtained revealed that yield parameters such as Number of pods per plant (13.08 and 14.11), Mean pod weight (17.59 g and 19.31 g), Mean pod length (6.13 cm and 6.83 cm), Fresh pod weight per plant (0.19 kg and 23 kg) and Pod yield (5.65 and 6.38 t ha-1) were significantly increased when the nitrogen dose of 120 kgN ha-1 was applied using PM 6.6 t ha-1 in conjunction with NHAE47-4 in both 2017 and 2018. Mean pod diameter (cm) was statistically similar with both the application of CD 12 t ha-1 and PM 6.6 t ha-1. Significant interaction effect was observed between variety and manure on Number of pod plant-1 (13.97 and 13.43), and Pod yield (6.21 and 7.29 t ha-1) in both 2017 and 2018 while Mean pod diameter (3.42 cm) in only 2017. From the results obtained, it can be concluded that in Jega, Kebbi state of Nigeria which falls within the Sudan Savannah agro-ecological zone, NHAE47-4 okra variety yields better than Dogo and LD88. Therefore, NHAE47-4 variety in conjunction with PM 6.6t ha-1 application could be selected for increased okra production in the study area.

Open Access Original Research Article

Functional Analysis Evolution History of Gonadal Soma-derived Factor (gsdf) in Black Rockfish, Sebastes schlegelii

Li. Xuemei, Xuliang Wang, Zhigang Wang

Asian Journal of Advances in Agricultural Research, Page 1-8
DOI: 10.9734/ajaar/2019/v9i330010

As a teleost- and gonad-specific growth factor, gsdf has been indicated to play an important role in sex differentiation and determination. In this study, the complete open reading frame (ORF) of gsdf was isolated from black rockfish, Sebastes schlegelii. Bioinformatics analysis showed that there is a conserved transforming growth factor-β (TGF-β) domain located on the C-terminus of Gsdf. Multiple sequence alignments revealed that fish gsdf were highly conserved in TGF-β domain which suggested their functional conservatism. Synteny analysis provided evidence for the hypothesis that gsdf was originated from fish-specific genome duplication (FSGD). To further explore its function, the expression pattern was examined based on the RNA-seq data and the result showed that significantly sexually dimorphic expression existing between male and female individuals. These results suggested that gsdf might play an important role in maintenance of male characteristics in Sebastes schlegelii.