Comparative effects of organic manure (tithonia diversifolia and bat-guano) on the crop yield of corn (in monoculture and in association with cowpea) in ngandajika region in central democratic republic of Congo

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Nkongolo, M., Lumpungu, K., Kizungu, V., Kalambaie, M., Tshimbombo, J. and Mukendi, K.

Globally, agriculture is still facing the challenge of supplying humanity with food, every year millions of people are added to the billions to be fed. Food production faces increasing population, a deficit to cover the needs of the global population with food (Francis, 1986). The famine in some vast regions of the world and continues to make havoc in Sub-Saharan Africa and the DRC in particular, the scourge is increasingly felt. The spaces to produce the food are reduced with the erosive phenomenon and flooding caused by global warming. A strategy that seems to be effective is the high production in confined spaces (AAR 1985). The cultures association system which is the production system of small farmers and the majority of farmers in Sub-Saharan Africa is part of this logic. But this system is faced with the same constraints as the conventional system including the availability of organic fertilizer yet, input the most accessible agricultural producer in tropical regions. Tithonia diversifolia and guano-bat organic amendments can be found in the tropics, with the bat breeding techniques producing bat guano that have just been developed. Both fertilizers may well contribute to the development of agriculture, not only because of their richness in nutrients, but also their availability. A study was conducted in the region Gandajika by testing, both organic fertilizers in monoculture maize (QPM variety) and in association with cowpea. The following results were recorded:
• The yield of the culture of my ï s monoculture is statistically the m ê me that 'in combination with either or e b e 2,959T/ha against 2,250T/ha
• The bat-guano gave a performance ï my lev é é s more than that, with the registered e Tithonia as well as in monoculture or in association with the é b é In monoculture there. Bat-guano> Tithonia> T e moin is 4,187T/ha> 3,733T/ha> 0,957T/ha.
In association with cowpea: Bat-guano> Tithonia> indicator is 3,187T / ha> 2,767T / ha> 0,792T / ha These organic manure can be recommended to farmers in their production systems in tropical regions, especially those in the read Ngandajika region.

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           Prof. Dr. Bilal BİLGİN

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