Volume 11, Issue 4

Flowering Stage Soil Bacterial Diversity as Affected by Long-term Tillage and Crop Residue Retention
Original Research
Tillage practises can affect the soil microbes and edaphic properties. The research was aimed to assess the influence of tillage and stubble retention on the soil bacterial diversity and soil properties at the flowering stage of the field pea (Pisum arvense L.) in a rotation system with spring wheat (Triticum aestivum L.). The experiment had four treatments; no-tillage with stubble removed (NT), no-tillage with stubble retained (NTS), conventional tillage with stubble removed (T), and conventional tillage with stubble incorporated (TS). Microbial genes in top bulk soil and rhizosphere soils were sequenced using bacterial 16S rRNA (V3V4) genes. Soil from NT and NTS recorded high number of bacterial 16S rRNA operational taxonomic units (OTUs) and the bacterial community in the 0-10 cm top soil varied significantly. Bacterial diversity indices in the bulk soil were greater compared to the rhizosphere. The predominant bacterial groups were Actinobacteria, Proteobacteria, and Acidobacteria. Bacterial classes correlated with soil temperature, nitrogen, and organic carbon, Olsen phosphorus and microbial biomass carbon in bulk and rhizosphere soil. The results showed the benefits of long-term tillage and crop residue and their influence on soil properties and microbial diversity in semi-arid environments.
World Journal of Agricultural Research. 2023, 11(4), 98-106. DOI: 10.12691/wjar-11-4-2
Pub. Date: December 24, 2023
Assessment of the Agronomic Performance of Seven Okra (Abelmoschus esculentus (L.), Moench) Cultivars in Southern Côte d’Ivoire
Original Research
Okra (Abelmoschus esculentus L., Moench) is a perennial herbaceous plant of the Malvaceae family. It is cultivated for its fruits in tropical and subtropical countries. Its global yield is estimated at more than 11 million tons, 32.74% of which comes from Africa. However, this yield remains insufficient to cover the food needs of populations. This is why new high-yielding cultivars are proposed so as to achieve food security. This study aims to contribute to improving food security by evaluating the agronomic performance of seven (7) cultivars (Clemson spineless, Noura F1, Djonan F1, Teriman, Divo, Kopê F1 and Local) introduced into Côte d'Ivoire. Thus, a Fisher block trial was set up on the experimental plot of the Pedagogical and Research Unit of Plant Physiology and Pathology at the University Félix HOUPHOUPËT-BOIGNY, in September 2022 and replicated in March 2023. The growth parameters (height, collar diameter and number of leaves and branches) were assessed at the 30th, 45th, 60th days and at cycle end. Moreover, phenological stages and yield were assessed. The results showed that all the tested cultivars had a height between 62 and 112 m at cycle end. The collar diameter of the plants of all cultivars oscillated between 17 and 24 mm, while the number of branches varied between 6 and 9. Noura F1 cultivar was the first to reach 50% flowering at 40 DAS and Kopê F1 cultivar the last one (61 DAS). All the cultivars had a yield significantly higher than 13 t/ha with the exception of Local (7.82 t/ha) and Kopê F1 (6.99 t/ha) cultivars. It would be advisable to evaluate the agronomic and health behaviour of these cultivars in other agro-ecological zones of Côte d'Ivoire before any large-scale dissemination.
World Journal of Agricultural Research. 2023, 11(4), 87-97. DOI: 10.12691/wjar-11-4-1
Pub. Date: November 13, 2023
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