Utilizing compost tea as a nutrient amendment in open filed cowpea seed production system

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Research Paper 01/08/2014
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Utilizing compost tea as a nutrient amendment in open filed cowpea seed production system

A.Z. Hegazi, A.M. Algharib
J. Bio. Env. Sci.5( 2), 318-328, August 2014.
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This study examined the effects of compost tea (CT) different applications (foliar spray or soil drench) on growth characters of cowpea plants. Tow field trials were conducted at horticulture research station Kaha, Kalyiobia governorate, Egypt, during the 2012 and 2013 summer seasons to investigate the effects of organic (CT) and inorganic, and its combinations on cowpea [Vigna unguiculata (L.)]. Cowpea plants were fertilized with seven fertilizer treatments: (1) 100% NPK (control); (2) 75% NPK+25% compost tea foliar (CTF); (3) 50% NPK+50% CTF; (4) 25% NPK+75% CTF; (5) 75% NPK+25% compost tea soil drench (CTS); (6) 50% NPK+50% CTS; and (7) 25% NPK+75% CTS. Compost tea was prepared by mixing compost with tap water at a ratio of 1:2 (Vol/ Vol), and storing this mixture at room temperature for about 24h. Cowpea plants were treated with two equal doses of compost tea; one month after sowing, and two months after sowing. Application of compost tea as soil drench was better than as a foliar spray in all studied traits, i.e. vegetative growth, seed yield, seed quality and mineral content of cowpea seeds. The best results obtained with 25% NPK+75% CTS followed by 50% NPK+50% CTS. Also compost tea as a foliar spray in the treatment 25% NPK+75% CTF gave better significant results than other foliar spray treatments. Obtained results highlight the prospects and potentials of using compost tea as renewable natural fertilizers for cowpea seed production.


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