Open Access Original Research Article

Physicochemical and Nutritional Properties of Date (Phoenix reclinata) from Dabou (Côte d’Ivoire)

Blei Sika Hortense, Digbeu Dogoré Yolande, Niaba Koffi Pierre Valery, Faulet Meuwiah Betty, Beugre Avit Grah Maxwell, Kouame Lucien Patrice

Asian Journal of Soil Science and Plant Nutrition, Page 1-8
DOI: 10.9734/ajsspn/2019/v5i230059

The date, Phoenix dactylifera is known for its richness in nutrients. Given the high selling price and its scarcity, some rural populations in Côte d'Ivoire consume the Phoenix reclinata date without knowing the functional properties for their well-being. The highlighting of the nutritional value of these fruits is necessary to promote its valorization and its consumption in the form of bioformulated foods. Thus, the physicochemical and antioxidant properties as well as the mineral richness contained in the pulps and the cores were determined using the Association  of  Official Analytical Chemists and  spectrophotometric methods The analyzes were carried out on ripe fruits dried at 20°C in the laboratory of agrovalorization of the Department of Biochemistry and Microbiology, University Jean Lorougnon Guédé between March and May 2019. The results reveal that the pulps and the cores are weakly acidic with respectively pH values of 6.37 ± 0.13 and 5.74 ± 0.06. The pulps and the cores contain respectively dry matter contents (90.39 ± 0.14 against 92.1 ± 0.02), in fibers (10.40 ± 0.17 against 88.7 ± 0.48), in energy values ​​(335.2 ± 0.44 kcal against 378.7 ± 1.07 kcal), in total polyphenols (2.63 ± 0.19 against 3.69 ± 0.18) and in minerals. The pulp and the cores have, for 100 g of solids, sodium contents (3.22 ± 0.12 mg against 3.69 ± 0.18 mg), potassium (0.71 ± 0.07 mg against 2.52 ± 0.08 mg), in phosphorus (3.00 ± 0.02 mg against 2.52 ± 0.08 mg), in calcium (0.16 ± 0.04 mg against 0.65 ± 0.03 mg), zinc (3.30 ± 0.05 mg vs. 3.08 ± 0.03 mg), iron (3.09 ± 0.01 mg vs. 3.26 ± 0.01 mg) and copper (2.93 ± 0.06 mg vs 3.08 ± 0.03 mg). These nutritious potentialities could be recommended in the formulation of foods for the malnourished.

Open Access Original Research Article

Nutritional Quality Response of Carrot (Daucus carota) to Different Rates of Inorganic Fertilizer and Biochar

Kwaku Asante, Joseph Manu-Aduening, Margaret Esi Essilfie

Asian Journal of Soil Science and Plant Nutrition, Page 1-14
DOI: 10.9734/ajsspn/2019/v5i230060

Nutritional quality of most high valued crops including carrot can be influenced by soil management practices. A field study to evaluate soil management improvement effect on nutritional quality of carrot was carried out in two contrasting cropping seasons of two rainfall regimes ranging from 600 mm to 800 mm in 2016 and 2017 at Mampong in the Forest-Savannah transition zone of Ghana. Three rates of soil amendments using biochar rates of 0, 5 and 10 tons/ha and five rates of inorganic fertilizers (NPK 15:15:15 at 200 kg/ha; P&K 50:50 at 50 kg/ha; P&K 50:100 at 50 kg/ha; Liquid Fertilizer at 1 L: 200 L Water/ha; and the control were applied using 3x5 factorial in RCBD. The combined analysis for the different treatments showed that NPK at 200 kg/ha+10 ton/ha biochar gave the highest protein content while Liquid fertilizer+5 ton/ha biochar gave the highest beta-carotene and total carotenoid contents in carrot root during the minor cropping season of 2016. However, during the major copping season of 2017, a combination of liquid fertilizer +10 ton/ha biochar gave the highest protein content whilst NPK at 200 kg/ha +5 ton/ha biochar gave the highest carotenoid content for the carrot. Nutritional contents such as carbohydrate, beta-carotene and total carotenoids were boosted by soil amendments. This indicates that both biochar and inorganic fertilizers have varying effects on the nutritional qualities of carrot.

Open Access Original Research Article

Influence of Soil Arsenic Levels on Biomass Production and Relationship the Concentration of Arsenic between Rice Straw and Grain

Mosud Iqbal, G. K. M. Mustafizur Rahman, G. M. Panaullah, Humayun Kabir, Jatish Chandra Biswas

Asian Journal of Soil Science and Plant Nutrition, Page 1-10
DOI: 10.9734/ajsspn/2019/v5i230061

Arsenic (As) contamination is widespread in Bangladesh. It can cause health hazards depending on consumption of foods grown on As contaminated soil. Two pot experiments were conducted at net house, Department of Soil Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur to study the effect of As on above ground biomass of different rice genotypes and to determine the relationship of As concentration between rice grains and straw. Sixteen rice genotypes were grown in pots soils having 0, 20, 40 and 60 mg/kg As both in winter and wet seasons. Soil As levels reduced above ground biomass of rice by 8-65%. Above ground biomass reduction was the least in BRRI dhan47 with variable soil As levels. Total As concentrations in straw and grains increased with increasing soil As levels. Moreover, the concentration of As in rice grain was also increased with greater As concentration in straw. Grain to straw ratio of As concentration was lower at higher As concentration in straw. It is indicated that reduced movement of As from rice straw to grain take place when straw As concentration was high.

Open Access Original Research Article

Occurrence of Hardened Matters in the Andosolic Cover from the Western Highlands of Cameroon: Case Study of Those Risen on Trachyte in the Southern Side of the Bambouto Mountains

J. C. Fopoussi Tuebue, S. D. Basga, P. Tematio, J. P. Nguetnkam

Asian Journal of Soil Science and Plant Nutrition, Page 1-13
DOI: 10.9734/ajsspn/2019/v5i230062

The aim of the present study is to acquire knowledge about the hardened materials present in the andosolic cover from the Bambouto Mounts. For that purpuse, petrographic, mineralogical, and geochemical characteristics of the hardened materials, isalteritic blocks, and the parent rock were investigated in order to put into relief the different facies found, the genetic relationship between those geological matters, and the mechanism governing the formation and the evolution of the hardened materials found in the Andosols from the Bambouto mounts. These matters have low thickness, are highly hardened, with different aspects and locations. They are present within the soils, at the point of emergence of streams, on the flatty areas on top of hills and at the foot of interfluves. Microscopically, their plasmas are respectively isotic and cristic. Gibbsite, goethite, and halloysite are respectively their main minerals. Geochemically, both facies are highly aluminous. During the weathering, Sanidine changes sequentially into Allophane, Halloysite, and Gibbsite; Pyroxen and Ilmenite for their own contribute to the formation of Goethite. There is a direct genetic relationship between the hardened materials, the isalteritic blocks, and the parent rock. The uphill position is the eluvial part and the downhill position the illuvial part; this generates the evolution of the hardened materials from their translucent initial status towards their reddening and tanning final status. The characteristics of the hardened materials make them bauxitic hardened materials, organized into two different facies: A lithorelictuel and a vitreous facies. The presence of those hardened materials in the Andosols from the Western Highlands of Cameroon is harmful for farming. The present study is then a high contribution to the management of the mine ore deposit within the Western Highlands of Cameroon.

Open Access Original Research Article

Dormancy Breaking and the Influence of Gibberellic Acid on the Early Growth of Tamarindus indica Seedlings in Mubi, Nigeria

S. C. Yusuf, N. N. Zakawa, T. D. Tizhe, D. Timon, J. J. Obot, S. G. Linus

Asian Journal of Soil Science and Plant Nutrition, Page 1-6
DOI: 10.9734/ajsspn/2019/v5i230063

The purpose of this research was to determine the appropriate methods of breaking seed dormancy, level of water uptake, and the influence of gibberellic acid on the early growth of Tamarindus indica seedlings. The scarification methods used included: concentrated sulphuric acid (H2SO4), manual scarification, flaming, hot and cold water treatments. The experiments were conducted in the laboratory on Petri dishes and in potting media. GA3 was used to optimize the production of seedlings by spraying the solution on the foliage. The treatment for 10 minutes with concentrated H2SO4 gave the maximum germination percentage and water uptake (80.41%). GA3 enhances the growth of the seedlings by increasing the height, the number of leaves and stem girth at eight weeks after sowing. In conclusion, all the scarification treatments applied to the seeds of T. indica proved effective. The ten minutes treatment with concentrated H2SO4 was the best treatment for breaking seed dormancy of T. indica. And gibberellic acid enhanced early and fast seedling growth as it increase height, number of leaves and stem girth of T. indica.