Abstract
Soil acidity is commonly ameliorated with lime while little attention is given to the application of molybdenum which is deficient in acid soils. Molybdenum is an important component of the nitrogenase enzyme essential for the symbiotic nitrogen fixing bacteria. An experiment was conducted in a controlled environment at the University of KwaZulu-Natal to evaluate the effect of lime and molybdenum on nodulation, growth and shoot nutrient content of soybean. The experiment was a randomised complete block design with three rates of lime applied at 0, 2650 and 4280 kg ha-1 and molybdenum as ammonium molybdate at 0 and 0.5 g L-1. Lime significantly (p<0.01) increased the uptake of Ca and P but decreased that of Mn. Also, increasing lime levels positively influenced most of the important plant growth parameters measured in the study. Molybdenum application significantly increased nodule formation but did not influence the concentration and uptake of the nutrients measured. Lime application also improved soil Ca and Mg but reduced Mn and exchangeable acidity levels at the end of the study. The treatment combination of lime at 4280 kg ha-1 and ammonium molybdate at 0.5 g L-1 gave the best result in nearly all parameters tested and it can hence be concluded that this combination improves both the nutrient uptake and nodulation of soybean grown in soil with very high acid saturation.
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Claims 8
Claim · model-written summary
Lime increased soybean calcium and phosphorus uptake.
- Taxon
- soybean
Glycine maxt0 - Treatment
- Limee0
- Outcome
- uptake of Ca and Pe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lime significantly (p<0.01) increased the uptake of Ca and P”
t0“soybean”
Claim · model-written summary
Lime decreased soybean manganese uptake.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Limee0
- Outcome
- that of Mne0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lime significantly (p<0.01) increased the uptake of Ca and P but decreased that of Mn”
t0“soybean”
Claim · model-written summary
Increasing lime levels improved most measured soybean growth parameters.
- Taxon
- soybeanGlycine maxt0
- Treatment
- increasing lime levelse0
- Outcome
- plant growth parameterse0
- Direction
- positively influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing lime levels positively influenced most of the important plant growth parameters measured in the study”
t0“soybean”
Claim · model-written summary
Molybdenum application increased soybean nodule formation.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Molybdenum applicatione0
- Outcome
- nodule formatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Molybdenum application significantly increased nodule formation”
t0“soybean”
Claim · model-written summary
Molybdenum did not influence measured soybean nutrient concentration and uptake.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Molybdenum applicatione0
- Outcome
- concentration and uptake of the nutrients measurede0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Molybdenum application significantly increased nodule formation but did not influence the concentration and uptake of the nutrients measured”
t0“soybean”
Claim · model-written summary
Lime improved soil calcium and magnesium.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Lime applicatione0
- Outcome
- soil Ca and Mge0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lime application also improved soil Ca and Mg”
t0“soybean”
Claim · model-written summary
Lime reduced soil manganese and exchangeable acidity.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Lime applicatione0
- Outcome
- Mn and exchangeable acidity levelse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lime application also improved soil Ca and Mg but reduced Mn and exchangeable acidity levels at the end of the study”
t0“soybean”
Claim · model-written summary
The highest lime and ammonium molybdate combination gave the best result across nearly all measured parameters.
- Taxon
- soybeanGlycine maxt0
- Treatment
- lime at 4280 kg ha-1 and ammonium molybdate at 0.5 g L-1e0
- Outcome
- nearly all parameters testede0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment combination of lime at 4280 kg ha-1 and ammonium molybdate at 0.5 g L-1 gave the best result in nearly all parameters tested”
t0“soybean”
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