International Journal of Agricultural Policy and Research Vol.1 (9),pp.277-287,November 2013
Available online at https://www.journalissues.org/journals/ijapr/
© 2013 Journal Issues ISSN 2350-1561
Article 13/ID/ JPR92, 011 pages
Original Research Paper
Effect of maize – stover compost and nitrogen fertilizer on dry matter accumulation and nutrient uptake of soybean (Glycine max (L.) Merril.)
Accepted 29 October,2013
1*Adeyeye, A.S., 2Togun, A.O., 3Akanbi, W.B. and 1Ahuchaogu, C.E.
1Federal University, Wukari Taraba State. Nigeria.
2University of Ibadan, Ibadan, Oyo State, Nigeria.
3Ladoke Akintola University of Technology, Ogbomoso. Oyo State. Nigeria
*Coresponding Author . E-mail: email@example.com
Dry matter accumulation and nutrient uptake of soybean in response to application of maize stover compost and nitrogen fertilizer were investigated. The three factor consisted of three compost rates (0, 2 and 4t/ha), three N levels (0, 30 and 60kgN/ha) and three soybean varieties (TGx1740-2F, TGx1842-1E and TGx1448-2E). The resulting 27 treatment combinations were laid out in randomized complete block design replicated three times. Data were collected on dry weights of root, stem and leaves and on plant nutrient uptake (major and minor nutrients) which were analyzed using DMRT at 5% level of probability. Leaf dry matter increased from 6 to 10 weeks after planting (WAP) and declined thereafter. The variety TGx 1448-2E had the highest leaf dry weight (4.0g) per plant followed by TGx 1842-1E (3.7g/plt) and TGx 1740-2F had the least (2.3g). Varying levels of N fertilizer had no significant (P>0.05) influence in leaf dry matter accumulation. However, highest leaf dry weight per plant (3.5g) was observed in plots fertilized with 30 kgN/ha. Application of compost had significant effect on stem dry weight except at 6WAP . Variety TGx 1842-1E had the best root dry matter weight per plant (2.2g). Application of 2 or 4t/ha compost had similar root dry matter value of 1.5g per plant which was significantly better than 1.1g per plant of non -fertilized plants. Effect of variety was highly significant on N, Ca, Mg, Zn, and Fe but not on P, K and Cu uptake and TGx1448-2E performed best. Nitrogen application rates of 60kgN/ha improved uptake of macro and micro nutrients by the plant (p<0.05) Also compost at 4t/ha had significant effect on all the nutrients assessed. The 2-way and 3-way interactive effects of variety, N-fertilizer and compost rate were highly significant in N, P, Ca, Mg, Cu and Fe uptake by soybean. The interactive effect of variety and nitrogen fertilizer was significant on the uptake of all the mineral nutrients assessed with exception of K and Zn. Uptake of N was highest with TGx 1448-2E when fertilized with 30kg/ha urea.
Key words: Soybean, compost, mineral fertilizer, nutrient uptake