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Botswana University of Agriculture and Natural Resources (BUANR) 2017

Evaluation of the nutritional potential of safflower (Carthamus tinctoriiis L.) leaves, seed and cake after oil extraction to be used as animal feed

Phuduhudu, Dineo

Titre : Evaluation of the nutritional potential of safflower (Carthamus tinctoriiis L.) leaves, seed and cake after oil extraction to be used as animal feed

Auteur : Phuduhudu, Dineo

Université de soutenance : Botswana University of Agriculture and Natural Resources (BUANR)

Grade : Master of Science MSc, Crop Science (Horticulture) 2017

Résumé partiel
Safflower is an annual oil seed crop adapted to arid and saline regions of the world, is a potentially novel food and medicine source, which has not been fully explored in the last century. Safflower’s ability to forage for sub-soil moisture with its vigorous tap root, tolerance to salinity, adaptability to wide range of temperatures, improved oil content and its versatility to produce oil high in linoleic and oleic fatty acids makes it a viable alternative to current crops grown in the more marginal cropping areas around the world. This study was carried out to evaluate the nutritional potential of the safflower leaves, seed and cake after oil extraction to be used as animal feed. Nine safflower genotypes were evaluated in a completely randomized block design with three replications in the Botswana University of Agriculture and Natural Resources, Notwane Farm under sandy loam soils. Tire results of the study showed that safflower genotypes significantly (P < 0.05) differed in oil, crude protein (CP), dry matter (DM), neutral detergent fiber (NDF), acid detergent fiber (ADF), acid detergent lignin (ADL), ash and mineral contents of the leaves, whole seeds and cake after oil extraction. The cake CP, NDF, ADF, ADL and ash contents significantly (P < 0.05) varied between 19.3-22.5, 54.6-61.2, 45.0-50.7, 18.0-20.8, and 1.10-1.60%, respectively, depending on genotype and growing season. While the seed mineral content significantly (P < 0.05) varied between 6.98-7.90 mg/g P, 10.68-12.91 mg/g K, 8.78-10.61 mg/g Ca, 4.45- 4.99 mg/g Mg, 90-120 ppm Zn, 70-90 pg/g Fe, 40-50 pg/g Mn, and 90-130 pg/g Cu, respectively, depending on genotype and growing season. Significant (P < 0.05) differences were also observed in the seed oil content, DM, CP, NDF, ADF, ADL and ash which varied between 26.13-42.17, 91.9-96.1, 16.3-19.1, 42.6-50.3, 39.7-48, 13.5-20.7, and 0.95- 1.41%, respectively, depending on genotype and growing season.

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Page publiée le 24 décembre 2022