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The Effect of Croton macrostachyus, Plectranthus barbatus Leaf Aqueous Extracts and Inorganic Fertilizers on Growth and Nutrients Concentration of Brassica oleracea L. in a Greenhouse at Nairobi

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dc.contributor.author Odhiambo, Kevin
dc.contributor.author Murungi, Jane
dc.contributor.author Wanjau, Ruth
dc.contributor.author Naumih, Noah
dc.date.accessioned 2019-09-11T14:06:57Z
dc.date.available 2019-09-11T14:06:57Z
dc.date.issued 2019
dc.identifier.issn 2320-7027
dc.identifier.uri http://erepo.usiu.ac.ke/11732/4738
dc.description Journal Article en_US
dc.description.abstract The study was undertaken in Sustainable Development Initiatives Centre greenhouse at United States international university -Africa. The greenhouse experiment was laid out in potted containers in a randomised complete Block design (RCBD), with 3 replications. A total of four treatmentscomposed of decomposed leaves extracts of Plectranthus barbatus (PB) and Croton macrostachyus (CM), inorganic fertilizer (IF) and Untreated soils (US) as control were used. The level of mineral and nutritive elements in leaf extracts and kales were determined by ICPE, β-carotene was determined by HPLC while Phosphorus Nitrogen were determined by UV-VIS. Data was analyzed using (ANOVA) and significant treatment means separated using the Turkey’s Honestly Significant Difference Test. The highest mean levels macro nutrients in leaves (μg/g) K+; 228.31±1.76; Mg2+,188.35 ± 1.24; PO43-, 16.21 ±3.36 and NO3-, 95.35 ± 2.36 for croton macrostachyus and K+: 412.71± 2.55. Mg2+: 369.72± 3.25, PO43-: 29.59 ± 2.04 and NO3 -,63.24± 1.47 for Plectranthus barbatus. Application of croton macrostachyus, and Plectranthus barbatus leaf water extracts resulted in increased mean shoot length, leaf length, and number of leaves of kales as compared to the control. The mean growth rate for kales (shoot length 8.69 ± 3.68-12.64cm, Mean leaf length 8.34 ± 4.17-12.82 ± 5.53, Mean number of leaves 8.38 ± 2.94-12.53± 4.73 and Yield (t/ha) ranged from 2.44 -5.89. Kales grown using leaf extracts had higher nutritive values as compared to the control. The mean nutritive values in kales were Iron (Fe) 3.87 – 5.24 mg/100g; Magnesium (Mg) 250.96-323.67 mg/100g; Sodium (Na) 216.21-320.81mg/100g; Phosphorus (P) 261.82-294.31 mg/100g; zinc (Zn)1.17 -1.36 mg/100g; and β-carotene 4.73±0.15 - 3.38± 0.09 mg/100g.There was significant difference in nutritive values between leaf extracts and control. The growth of kales using leaf extracts of Croton macrostachyus responded better and gave a yield that was comparably higher to those of inorganic fertilizer and control. This study suggests that Croton macrostachyus and Plectranthus barbatus leaves may be potential source of plant nutrients for crop production and higher nutritive values. en_US
dc.language.iso en en_US
dc.publisher Asian Journal of Agricultural Extension, Economics & Sociology en_US
dc.relation.ispartofseries 29(3): 1-10, 2019; Article no.AJAEES.46347;
dc.subject Croton macrostachyus en_US
dc.subject Plectranthus barbatus en_US
dc.subject Leaf Aqueous en_US
dc.subject Inorganic Fertilizers en_US
dc.subject Nutrients Concentration en_US
dc.subject Brassica oleracea L. en_US
dc.subject Greenhouse at Nairobi en_US
dc.title The Effect of Croton macrostachyus, Plectranthus barbatus Leaf Aqueous Extracts and Inorganic Fertilizers on Growth and Nutrients Concentration of Brassica oleracea L. in a Greenhouse at Nairobi en_US
dc.type Article en_US


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