International Journal of Agricultural Policy and Research
Vol.4 (3), pp. 35-45, March 2016
Available online at https://www.journalissues.org/IJAPR/
Article 15/ID/JPR90/11/ pages
Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License.
Original Research Article
Effects of watering regime, organic manuring and mycorrhizal inoculation on the growth and development of Shea butter (Vitellaria paradoxa C.F.Gaertn) seedlings
Agele1, S.O., Osaigbovo2, A.U., Ogedegbe2, S.A. and Nwawe3, A.K.
1Department of Crop, Soil and Pest Management, Federal University of Technology, PMB 704, Akure, Nigeria.
2Department of Crop Science University of Benin, Benin City, Nigeria
3Agronomy Division, Nigerian Institute for Oil Palm Research (NIFOR), Benin City, Nigeria
Corresponding Author Email: ohiagele(at)yahoo.com
In the Sub-Saharan Africa, the Shea tree (Vitellaria paradoxa C.F. Gaertn) has widespread occurrence of Shea Parklands across savanna landscapes. Recent demand growth for Shea butter by cosmetic and confectionary industry obtained from shea tree provides opportunities for income generation thus making signiﬁcant contribution to rural livelihoods and ecosystem services. However, the Shea butter tree is a valuable resource which may become extinct if domestication is not intensified. Two screen house experiments were conducted sequentially to evaluate the effect of watering regime, organic manure application and mycorrhizal (Glomus mossae) inoculation on the growth and development of Shea butter seedlings. After the screen house experiment was terminated, the seedlings were planted on the field to assess their performance and survivability. Eight treatments (once a week watering (W1), once a week watering plus 2 t ha-1 of manure (W1Mn300), once a week watering plus 100 g of mycorrhiza inoculation (W1My100) and once a week watering plus 300 g of mycorrhiza inoculation (W1My300), once in two weeks watering (W2), once in two weeks watering plus 2 t ha-1 of manure (W2Mn300), once in two weeks watering plus 100 g of mycorrhiza inoculation (W2My100), once in two weeks watering plus 300 g of mycorrhiza inoculation (W2My300) were fitted into a Completely Randomizd Design (CRD) replicated three times. On the field, 32 plants 4 each from the 8 treatments were fitted into a randomized complete block design (RCBD) replicated three times. Collectively, the variables measured were plant height, stem diameter, number of leaves, crude leaf area, chlorophyll content, mycorrhiza colonization of roots, leaf fall and plant mortality. Shea butter seedlings treated with 2 t ha-1 of manure in combination with either once a week or once in 2 weeks watering exhibited significantly (p < 0.05) better growth than seedlings from the other treatments. Seedlings inoculated with 100 g of mychorriza and watered once a week (W1My100) were comparable to those that received 2 t ha-1 of manure and once a week watering (W1Mn300) in number of Shea plant leaves. The survival ability of seedlings on the field was high (75 %) irrespective of treatment received in the screen house.
Key words: Manuring, vegetative methods, Vitellaria paradoxa, environmental degradation, mycorrhiza inoculation