Indonesian Journal of Agricultural Research

Roasting's Effects on Proximate and Amino Acid Content of Maize

Nonso Ejoh, C.G. Onyeulo — Mon, 02 May 2022 00:00:00 +0700

The main objective of this research is to compare the amino acid and proximate compositions of raw and roasted maize samples. Complete randomized experimental design with triplicates replications was applied. From the analysis, we were able to obtain the following values: total carbohydrates (78.28-79.85 percent), crude protein (7.32-7.05 percent), crude fat (2.70-2.20 percent), crude fiber (2.40-2.10 percent) and ash (2.10-2.50 percent) for both raw and roasted maize seeds. Prolonged exposure to the heat from roasting altered the amino acid content as obtained from the result. The concentration of amino acids in the seeds was reduced by the heat effect. The highest concentration of leucine was contained in seeds, with a value of 1.30 g/16 g N and 0.95 g/16 g N in the case of the raw and roasted seeds, respectively. Lysine and tryptophan concentrations were low, but they contain equal quantities of amino acids containing sulphur, which are methionine and cystine.

1-Methylcyclopropene and Ethephon Effects on 'Carabao' Mango Fruits Harvested at Different Stages of Fruit Maturity

Bryl Manigo, Narlyn Antibo — Mon, 02 May 2022 00:00:00 +0700

Three experiments were conducted using three different stages of fruit maturity (100, 105, and 110 DAFI or days after flower induction) of ‘Carabao’ mangoes harvested from the same set of trees. Fruits harvested were applied with 1-MCP [(dosage:0.5 µL/L) via gas exposure for 20 hours and spraying], and ethephon (dipping at 1ml/L of H2O) applied singly or in combination. Mangoes were then stored in ambient room conditions [29.2±1.6°C, 69.88±4.0% relative humidity (RH)]. Mango fruits with 1-MCP treatment applied through gas exposure at 0.5 µL/L consistently delayed the peel color change, firmness, and weight loss of harvested fruits at 100, 105 and 110 DAFI. These fruits held its shelf life for 15 (100 DAFI), 12 (105 DAFI) and 9 (110 DAFI) days compared to control with 12, 10 and 8 days respectively. Furthermore, all treatments showed varied effects on the visual quality of fruits regardless of its maturity. It also appeared that fruits at 105 DAFI treated with ethephon alone have better taste while other organoleptic attributes, chemical properties (TSS, TTA and pH), as well as the disease incidence and severity were found to be comparable. This further proved that 1-MCP delays ripening of fruits but could not prevent disease occurrence.

Brooding Technology Use and Technical Efficiency among Egg Producers in Oyo State, Nigeria

Chuks O. Idiaye, Adebusola F. Adebayo, Isaac B. Oluwatayo — Fri, 15 Jul 2022 00:00:00 +0700

This paper investigated the types of brooding technology used by egg producers in Oyo State, Nigeria and its effect on technical efficiencies of the producers. The study was carried out in two Local Government Areas (LGAs) of Oyo State with data obtained from a total of 139 egg producers (farmers). Descriptive statistics was used to profile the farmers, probit model was employed to analyse the determinants of choice of brooding management technology, Cobb-Douglas stochastic frontier function was used to estimate technical efficiency among the farmers and Tobit regression model was also employed to ascertain technical efficiency determinants. The results show that only 9.4% of the farmers used modern brooding technology and over 50% of them employed unskilled labour. Sex of the farmer (p<0.10), household size (p<0.05) and having a secondary income (p<0.05) were the significant factors influencing adoption of modern brooding technology. Farmers who adopted the traditional brooding technology were found to be 4.3% more efficient than those using modern technology. Age (p<0.00), sex (p<0.05) and production experience (p<0.05) significantly affected their technical efficiencies. It was therefore recommended that technology subsidies, adequate extension training and skill acquisition be injected into the poultry industry to improve production efficiency.

Analyses of Bioactive Compounds of Pegagan (Centella Asiatica (L.) Urb) from Samosir – Indonesia Accession

Noverita Sprinse Vinolina, Riswanti Sigalingging — Wed, 03 Aug 2022 00:00:00 +0700

Centella Asiatica or Pegagan is classified as one of the wild plants that has not been domesticated. The excessive usage of this plant in traditional and modern medicinal applications threatens its population and sustainability. Thus, to preserve the plant and supply the high request of this plant in agromedicinal industry, studies concerned with the growth and bioactive compounds of Pegagan cultivated under commercial field conditions are urgently needed. This study purposed to examine the bioactive components of Pegagan (especially in leaves and roots) under field conditions, including asiaticoside, madeccasoside, and Asiatic acid. The Pegagan was harvested weeks after planting (WAP). The wet and dry weights of the leaves and roots were weighted and subsequently measured for their centelloside compounds by Thin-Layer Chromatography (TLC) procedure. The results revealed that the resulting asiaticoside content in the roots (1.25%) was higher than in the leaves (0.88%). The same results were achieved for the madecassoside content where the madecasosside content in the roots was 2.23%, while the content in the leaves was 2.11%. However, contrarily, the Asiatic acid compound in the leaves was 1.10% higher than the content in the roots (0.60%). It might be attributed to a longer period of field cultivation of Pegagan that delivered adequate time for the plant to alter Asiatic acid to asiaticoside and madecasosside at a later developmental growth. Moreover, these discoveries are advantageous in defining the most proper harvest time for commercial field cultivation of Pegagan to yield the highest amount of certain centelloside compounds.