Nyembo et al. J. Appl. Biosci. 2014. L'apport combiné des biodéchets et des engrais minéraux des propriétés du sol et sur le comportement du maïs (Zea mays L. variété Unilu) 6121 Amélioration des propriétés physiques et chimiques du sol sous l'apport combiné des biodéchets et des engrais minéraux et influence sur le comportement du maïs (Zea mays L. variété Unilu) Nyembo et al. J. Appl. Biosci. 2014. L'apport combiné des biodéchets et des engrais minéraux des propriétés du sol et sur le comportement du maïs (Zea mays L. variété Unilu) 6122ABSTRACT Combined effects of biowastes and mineral fertilizers on soil properties and maize yield in Lubumbashi, DR Congo Objectives: This study was conducted during 2012-2013 growing season on the Ferralsol Kasapa farm in Lubumbashi region to assess the effects of combined doses of manure and mineral fertilizers on the yield of maize (Zea mays Var UNILU) and some physico-chemical properties of soil. Methodology and results: The trial was installed following a split splot device comprises in total 12 treatments and three repetitions. The treatments included four doses of manure from chickens (0, 1.75, 3.5 and 7 t.ha -1 ) and three doses of mineral fertilizer (0, 300 kg NPK+ 200 kg urea by hectare and 150 kg NPK + 100kg urea by hectare). Physico-chemical analyzes were performed on samples of soil and biowastes. The general trend of the evolution of levels (N and K) was decreased compared to baseline and high doses of mineral fertilizers and organic waste provided high amounts of N and K. Yield were significantly affected by the supply of minerals that of biowastes. The combination of chicken manure helped increase maize yield (6.9 t.ha -1 of maize grain at 7 t.ha -1 biowastes combined to 150kg NPK+100 kg urea), while the lowest yield (2.9 t.ha -1 ) was obtained on the control plots. Conclusion and research application: The study showed that biowastes combined with inorganic fertilizers increased maize yield in the conditions of this test. Biowaste have great potential for improving the availability of nutrients from soil and was able to provide the amount of nutrients needed for maize growing.
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