Effets de doses croissantes des composts de fumiers de poules sur le rendement de chou de Chine (<i>Brassica chinensis</i> L.) installé sur un sol acide de Lubumbashi

Abstract

Effects of increasing doses of compost on the performance of Chinese cabbage (Brassica chinensis L.) installed on an acid soil of Lubumbashi Objective: A study was conducted on a ferralsol to assess the agronomic efficiency of manure from chickens and mineral fertilizers (NPK and urea) on the yield of Chinese cabbage. Methodology and Results: The experimental design was a completely randomized with six repetitions and six treatments: T0 (unfertilized control), T1 (175 kg NPK +87 kg urea per hectare), T2 (350 kg NPK+47.5 kg Urea per hectare), T3 (15 t.ha -1 manure of chicken compost), T4 (30 t.ha -1 manure of chicken compost), T5 (60 t.ha -1 manure of chicken compost). Manure of chicken, NPK and urea were incorporated into the soil, respectively, a week before the day of transplantation and 3 weeks after transplantation. Highly significant differences (p < 0.05) were found between treatments in terms of growth and yield of Chinese cabbage corn with yields ranging from 1.4 to 5.1 t.ha -1 , the treatments T2 and T5 which gave similar yields and the highest and lowest T0 treatment. Conclusion and application: With reference to yields and agronomic efficiency, doses of manure at 15 t.ha -1 agree to address any use of mineral inputs. However, due to the low availability of manure nutrients, a mineral fertilizer supplement is recommended. The study showed that chicken manure under the conditions of this trial was a great potential for improving the availability of nutrients in soil and was able to provide the amount of nutrients needed to growing Chinese cabbage without the addition of mineral fertilizers.

Effect of Agricultural Residues Based-Compost on the Yield of Amarantus hybridus L. (Amaranthaceae) in Gbado-Lite City, Nord-Ubangi (Democratic Republic of the Congo)

“…The most robust subjects (12.66 mm) were obtained from the T3 treatment where there was a mixture of both residues compared the control (9.00 mm). This higher response is for sure related to the combined action of improving soil properties and mineralized nutrients as reported in the literature [15]. The ANOVA showed that the coefficient of variation remains below 50% i.e.…”

“…This means that compost as a valuable organic material is the source of minerals responsible for the growth including nitrogen [14]. It emerges that the evolution of growth was side by side at the beginning of the vegetation and grew in size at the third week because during this period the radicular apparatus became powerful to fulfill its physiological function by emitting nurturing roots for good growth [15]. This growth is stimulated by the synergistic combination of compost based on the mixture of groundnut and maize crop residues because of their enrichment in nitrogen and phosphorus [16].…”

“…However, the vegetative growth of amaranth plants, although improved by compost input, was directly proportional to the nature of composts [15]. The positive effect of compost on plant growth is mainly due to improvements in the physical, chemical and biological qualities of the soil, the rate of nutrient diffusion and the water retention capacity.…”

“…From the above table, it is observed that effects of organic fertilizers were higher for the remaining of vegetative parameters compared to the unfertilized control soil. These effects are believed to be related to the combined action of improved soil properties and nutrient mineralization [15]. The coefficient of variation is greater than 50%, i.e.…”

“…It is observed that plants, leafy vegetables, have responded favorably to the application of the composts offered by the residues of groundnut crops and residues of groundnut and maize crops, which are rich in nitrogen and phosphorus nitrogen respectively. These matter have therefore increased the yield in useful product, biomass, such was the observation that organic matter contributes to the stability of the physical, chemical and biological conditions of the soil [15]. The crops grown on the types of these soils with organic materials are more resistant to random climatic variations and give stable yields [17].…”