Effect of humic acid doses on yield and quality parameters of cowpea [Vigna unguiculata (L.) Walp] cultivars

DOI: 10.18805/lr.v0iOF.3763    | Article Id: LR-286 | Page : 155-159
Citation :- Effect of humic acid doses on yield and quality parameters of cowpea[Vigna unguiculata (L.) Walp] cultivars .Legume Research.2017.(40):155-159
Address :

Selcuk University, Faculty of Agriculture, Department of Field Crops, Konya-Turkey.

Submitted Date : 25-04-2016
Accepted Date : 14-09-2016


Present research was conducted to determine the effect of humic acid (HA) on the yield and nutritional characteristics of cowpea varieties to provide an alternative crop for sustainable agricultural systems. Field trials were carried out for 2 years in Konya/Turkey ecology. HA was applied in 4 doses (0, 70, 110 and 150 kg ha-1 in total) on 2 cowpea varieties (Akkiz and Karagoz) and a total of 20 parameters were evaluated. Results showed that, 1000 seed weight, seed yield, protein yield, potassium and manganese showed an increasing tendency by increased dose of humic acid. Furthermore, 70 kg ha-1 dose of humicacid recorded higher stomatal conductance and first pod height, while applicationof 110 kg ha-1 of humic acid recorded higher plant height and proteinratio. Future research related with nutritional values is needed for achieving better growing techniques and mineral composition in cowpea genotypes.   


Chemical composition Fertilization Food Nutritional quality Sustainability.


  1. Alayande, L.B., Mustapha, K.B., Dabak, J.D. and Ubom, G.A. (2012). Comparison of nutritional values of brown and white beans in Jos North Local Government markets. African Journal of Biotechnology, 11:10135-10140.
  2. Anonymous (2016) http://www.konyaseker.com.tr/organic_fertilizer (Access date: 04.04.2013).
  3. AOAC (1990) Official Methods of Analysis of the Association of Official Analytical Chemists. 15th ed. Washington, DC, USA.
  4. Atis, I. (2000). Hatay koþullarinda ikinci ürün olarak tane ve hasil amaciyla yetiþtirilebilecek börülce (Vigna sinensis L.) tiplerinin verim ve verim unsurlarinin belirlenmesi. MSc Thesis, Advisor: Assist. Prof. Dr. Saban YILMAZ, Mustafa Kemal University, Antakya, Turkey.
  5. Azarpour, E., Danesh, R.K. and Mohammadi, S. (2011). Effects of nitrogen fertilizer under foliar spraying of humic acid on yield and yield components of cowpea (Vigna unguiculata). World Applied Sciences Journal, 13: 1445-1449. 
  6. Burt, R. (ed.) (2004). Soil Survey Laboratory Methods Manual. Soil Survey Laboratory Investigations Report No: 42. 
  7. Buyukkilic, M.C. (1995). A research of the effects of some agricultural characters of plant density on cowpea grown as double crop in Sanliurfa. MSc Thesis, Advisor: Assist. Prof. Dr. Hakan OKANT, Haran University, Sanliurfa, Turkey.
  8. Chikwendu, J.N., Igbatim, A.C. and Obizoba, I.C. (2014). Chemical composition of processed cowpea tender leaves and husks. International Journal of Scientific and Research Publications, 4: 1-5.
  9. Famata, A.S., Modu, S., Mida, H.M., Hajjagana, L., Shettima, A.Y. and Hadiza, A. (2013). Chemical composition and mineral element content of two cowpea [Vigna unguiculata L. walp.] varieties as food supplement. International Research Journal of Biochemistry and Bioinformatics, 3:93-96.
  10. Kahraman, A. (2014). Effects of sowing times on the yield, yield components and quality characteristics of dry bean (Phaseolus vulgaris L.) genotypes. PhD Thesis, Advisor: Prof. Dr. Mustafa ONDER. Selcuk University, Konya, Turkey.
  11. Motaghi, S. and Nejad, T.S. (2014). The effect of different levels of humic acid and potassium fertilizer on physiological indices of growth. International Journal of Biosciences, 5: 99-105.
  12. Owolabi, A.O., Ndidi, U.S., James, B.D. and Amune, F.A. (2012). Proximate, antinutrient and mineral composition of five varieties (improved and local) of cowpea, Vigna unguiculata, commonly consumed in Samaru Community, Zaria-    Nigeria. Asian Journal of Food Science and Technology, 4:70-72.
  13. Ozturan, Y. (2003). The effects of different row spacing and nitrogen fertilization on yield and yield components of cowpea [Vigna unguiculata (L.) Walp.] under Samsun conditions. MSc Thesis, Advisor: Prof. Dr. Ali GULUMSER, 19 Mayis University, Samsun, Turkey.
  14. Sehirali, S. (1988). Yemeklik tane baklagiller. Ankara University Agricultural Faculty Class Book, no: 1089.
  15. Sert, H. and Ceyhan, E. (2012). The effects of seed yield and some agricultural characters of different plant density on cowpea (Vigna sinensis (L.) Savi) in Hatay ecological conditions. Selcuk Journal Agriculture and Food Science, 26:34-43.
  16. Wright, D. and Lenssen, A.W. (2013). Humic and fulvic acids and their potential in crop production. Agriculture and Environment Extension Publications, 187.

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