Green manures and NPK fertilizer effects on soil properties, growth,yield, mineral and vitamin C composition of okra (Abelmoschus esculentus(L.) Moench)

Adekiya, A.O and Agbede, T.M and Aboyeji, C.M and Dunsin, O and Ugbe, J. O. (2019) Green manures and NPK fertilizer effects on soil properties, growth,yield, mineral and vitamin C composition of okra (Abelmoschus esculentus(L.) Moench). Journal of the Saudi Society of Agricultural Sciences, 18 (2). pp. 218-223. ISSN 1658-077X

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Abstract

The nutritional effects of green manure on soil and crop plants depends on residue quality. Hence fieldexperiments were carried out during the cropping seasons of 2015 and 2016 to compare the impact ofdifferent green manures and NPK 15-15-15 fertilizer on soil properties, growth, yield, mineral and vita-min C composition of okra (Abelmoschus esculentus(L.) Moench). The experiment each year consisted offour green manure (GM) types {Pawpaw (Carica papayaL.) leaves, Neem (Azadirachta indicaA. Juss.)leaves, Moringa (Moringa oleiferaLam.) leaves, and Mesquite (Prosopis africanaGuill., Perr. & A. Rich)Taubert leaves}, NPK 15-15-15 fertilizer and a control. The six treatments were arranged in a randomizedcomplete block design with four replications. Application of GMs reduced soil bulk density and increasedsoil organic matter (OM), N, P, K, Ca, Mg, growth and yield of okra compared with the control. NPK fer-tilizer did not reduce soil bulk density and increase soil OM, but did increase soil N, P, K, Ca, Mg, growthand yield of okra compared with the control. Mesquite increased growth and yield of okra compared withNPK fertilizer and other GMs. This was due to increased availability of N and K in the soil at the level ofthis treatment. Using the means of the two years and compared with the control and NPK fertilizer,Mesquite increased pod yield of okra by 214 and 53%, respectively. Also GMs and NPK fertilizer increasedokra mineral and vitamin C contents compared with the control. Moringa had the best fruit quality interms of higher K, Ca, Fe, Zn, Cu, and vitamin C contents compared with other GMs and NPK fertilizer.Therefore, for those that desire to grow okra for the quality of its fruits, Moringa (Moringa oleifera) is rec-ommended, however for those that desire quantity, Mesquite (Prosopis africana) is recommended.

Item Type:	Article
Subjects:	S Agriculture > SB Plant culture
Depositing User:	Mr DIGITAL CONTENT CREATOR LMU
Date Deposited:	18 Sep 2019 14:41
Last Modified:	18 Sep 2019 14:41
URI:	https://eprints.lmu.edu.ng/id/eprint/2266

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