#nutrient uptake

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Effect of different phosphorus rate combined to rhizobium biofertilizers on Bambara groundnut [Vigna subterranea (L.) Verdcourt] productivity in Benin

Rhizobial inoculation and phosphorus supplementation could be an alternative means of supplying important nutrients in legumes crops for their higher yields. This study was carried out to determine the optimal rate of phosphorus in combination with Rhizobium for Bambara groundnut improvement. Experiments were carried out in Northen Benin and in Central Benin. Five levels of phosphorus (0 kg, 20 kg, 40 kg, 60 kg and 80 P ha-1) and two levels of inoculation (inoculation with Rhizobium strain and no inoculation) were arranged in Randomized Complete Block design repeated five times. Results showed that inoculated treatments were significantly higher than non-inoculated treatment. Phosphorus supplementation significantly influenced the nodulation, shoot and root dry weight, straw and grain yield and nitrogen uptake of Bambara groundnut in both areas. The inoculation combined with the 60 or 80 kg ha-1 rate of phosphorus induced a 62% and 46% increase in grain and straw yield in the Centre and 78% and 58% increase in straw yield compared to the yields obtained on control in northern Benin. N uptake varied from 12.26 to 60.28 kg N ha-1 in the Centre and from 13.99 to 61.2 kg N ha-1 in the northern Benin. No significant difference was not found between the treatments combined inoculation and application of 60 or 80 kg ha-1 of phosphorus. So, application of 60 kg ha-1 of phosphorus fertilizer combined to inoculation with a suitable Rhizobia strain could be considered as an alternative by small farmers for increasing productivity of Bambara groundnut.

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Effects of Climate Smart Agricultural practices and Planting Dates on Maize Growth and Nutrient Uptake in Semi-Arid Tanzania

The shift of growing season’s onset due to rainfall and seasonal variability are among the climate change impacts affecting agricultural productivity in semi-arid. Previous studies have also noted the seasonal variations in planting windows in semi-arid Tanzania. Because of such rainfall variability due to uncertainties of climate change, farmers face difficulties in determining the appropriate planting dates. Though, climate-smart agriculture (CSA) practices are reinforced to mitigate such climatic extremes and sustain crop production, there is limited information on the performance of CSA practices under the uncertainty of planting windows due to unpredictable rainfall on-set and patterns. This study assessed the effects of CSA practices at different planting windows on maize growth and nutrient uptakes at Mlali village of Dodoma, Tanzania. A split-plot experimental design was adopted, treatments involved CSA practices (Chololo pits, tied ridges, intercropping and Ox-cultivation – as a control) and/at planting windows (Early, Normal and Late planting). The planting windows were determined based on previous studies and Tanzania national weather forecasts. The results showed that, CSA practices had a significant (p < 0.05) effect on maize height and N nutrient uptake. Similar biomass and Mg nutrient uptake were significantly affected (p < 0.05) by both CSA practices and planting dates though Leaf Area Index (LAI) were significantly affected (p < 0.05) by planting windows. Chololo pits and tied ridges and late planting dates had the highest soil moisture, plant heights, and biomass. Ox-cultivation had a slight high N, K and Mg nutrient uptake followed with Chololo pits and tied ridges.

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Efficacy of formulated carriers inoculated with plant growth promoting rhizobacteria on maize growth

Unavailability of a suitable carrier seriously hampered the mass production of bio-inoculant in developing countries including Pakistan. The present study was designed to evaluate the quality of formulated carriers for bio-inoculant on maize. Complete randomized design was applied with six treatments in triplicates. Formulated carriers; FC-1 (40% clay soil + 35% fly-ash + 15% press-mud + 10% lignitic coal), FC-2 (40% clay soil + 40% fly-ash + 10% press-mud + 10% lignitic coal), FC-3 (40% clay soil + 35% fly-ash + 10% press-mud + 15% lignitic coal), FC-4 (40% clay soil + 30% fly-ash + 15% press-mud + 15% lignitic coal) and BC (biozote carrier) were inoculated with broth culture of pre-isolated PGPR strains (MR8 & MR5). Un-inoculated seeds were used as control. Results revealed that all the inoculated carriers showed a significant increase over un-inoculated control related to different growth parameters but FC-4 found better followed by FC-1. The two PGPR strains demonstrated significant variation for shoot height and root length. Interaction effect (inoculated carriers × bacterial strains) remained non-significant in shoot and root. Nutrient uptake by maize plant differed significantly from control due to PGPR inoculated carriers. The highest uptake was observed with FC-4 followed by FC-1. Interaction effect (inoculated carriers × bacterial strains) was significant for N, P, K, Na, Zn, Cu and Mn uptake. Significantly higher nutrient uptake was calculated in plants inoculated with MR8 compared to MR5. Formulated carrier-4 can be utilized for biofertilizer production but further testing on other bacterial strains and crops is recommended.

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Efficacy of formulated carriers inoculated with plant growth promoting rhizobacteria on maize growth

Abstract Unavailability of a suitable carrier seriously hampered the mass production of bio-inoculant in developing countries including Pakistan. The present study was designed to evaluate the quality of formulated carriers for bio-inoculant on maize. Complete randomized design was applied with six treatments in triplicates. Formulated carriers; FC-1 (40% clay soil + 35%  fly-ash + 15% press-mud…

Efficacy of formulated carriers inoculated with plant growth promoting rhizobacteria on maize growth

[oaresearchpaper]

Unavailability of a suitable carrier seriously hampered the mass production of bio-inoculant in developing countries including Pakistan. The present study was designed to evaluate the quality of formulated carriers for bio-inoculant on maize. Complete randomized design was applied with six treatments in triplicates. Formulated carriers; FC-1 (40% clay soil + 35% fly-ash + 15% press-mud + 10% lignitic coal), FC-2 (40% clay soil + 40% fly-ash + 10% press-mud + 10% lignitic coal), FC-3 (40% clay soil + 35% fly-ash + 10% press-mud + 15% lignitic coal), FC-4 (40% clay soil + 30% fly-ash + 15% press-mud + 15% lignitic coal) and BC (biozote carrier) were inoculated with broth culture of pre-isolated PGPR strains (MR8 & MR5). Un-inoculated seeds were used as control. Results revealed that all the inoculated carriers showed a significant increase over un-inoculated control related to different growth parameters but FC-4 found better followed by FC-1. The two PGPR strains demonstrated significant variation for shoot height and root length. Interaction effect (inoculated carriers × bacterial strains) remained non-significant in shoot and root. Nutrient uptake by maize plant differed significantly from control due to PGPR inoculated carriers. The highest uptake was observed with FC-4 followed by FC-1. Interaction effect (inoculated carriers × bacterial strains) was significant for N, P, K, Na, Zn, Cu and Mn uptake. Significantly higher nutrient uptake was calculated in plants inoculated with MR8 compared to MR5. Formulated carrier-4 can be utilized for biofertilizer production but further testing on other bacterial strains and crops is recommended.

[oaresearchpaper]

Rhizobial inoculation and phosphorus supplementation could be an alternative means of supplying important nutrients in legumes crops for their higher yields. This study was carried out to determine the optimal rate of phosphorus in combination with Rhizobium for Bambara groundnut improvement. Experiments were carried out in Northen Benin and in Central Benin. Five levels of phosphorus (0 kg, 20 kg, 40 kg, 60 kg and 80 P ha-1) and two levels of inoculation (inoculation with Rhizobium strain and no inoculation) were arranged in Randomized Complete Block design repeated five times. Results showed that inoculated treatments were significantly higher than non-inoculated treatment. Phosphorus supplementation significantly influenced the nodulation, shoot and root dry weight, straw and grain yield and nitrogen uptake of Bambara groundnut in both areas. The inoculation combined with the 60 or 80 kg ha-1 rate of phosphorus induced a 62% and 46% increase in grain and straw yield in the Centre and 78% and 58% increase in straw yield compared to the yields obtained on control in northern Benin. N uptake varied from 12.26 to 60.28 kg N ha-1 in the Centre and from 13.99 to 61.2 kg N ha-1 in the northern Benin. No significant difference was not found between the treatments combined inoculation and application of 60 or 80 kg ha-1 of phosphorus. So, application of 60 kg ha-1 of phosphorus fertilizer combined to inoculation with a suitable Rhizobia strain could be considered as an alternative by small farmers for increasing productivity of Bambara groundnut.