Abstract
The effect of liquid fertilizers with Si, Ca or Mg on the growth of sorghum (Sorghum bicolor) was evaluated in an Ultisol under greenhouse conditions. Four liquid fertilizers (two potassium silicates, calcium carbonate and magnesium oxide) were applied into the soil in liquids at doses of 2 and 4 ml.pot-1, plus a control, in a randomized unrestricted design with 9 treatments and 4 replicates. Growth variables, assessed 45 days after sowing, were dry weight of root and aerial parts. Analysis of soil and plant at the end of the test was performed. The application of Ca and Mg significantly increased growth and nutrient uptake of sorghum. Liquid calcium carbonate promoted the highest values of dry biomass and absorption of N, P, Ca, S, Cu, Zn, Mn and B. Si sources had no significant effects on biomass, except for K silicate with Ca and Mg at the dose of 4 ml.pot-1, which also produced a significant increase in K absorption. Calcium carbonate and magnesium oxide significantly increased soil pH and decreased exchangeable acidity and Al, and also increased Ca or Mg content in the soil.
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Claims 5
Claim · model-written summary
Calcium and magnesium application significantly increased sorghum growth and nutrient uptake.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of Ca and Mg significantly increased growth and nutrient uptake of sorghum.”
t0“sorghum”
Claim · model-written summary
Liquid calcium carbonate yielded the greatest dry biomass and uptake of eight nutrients.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liquid calcium carbonate promoted the highest values of dry biomass and absorption of N, P, Ca, S, Cu, Zn, Mn and B.”
t0“sorghum”
Claim · model-written summary
Silicon sources had no significant biomass effect, with a stated exception.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si sources had no significant effects on biomass, except for K silicate with Ca and Mg at the dose of 4 ml.pot-1”
t0“sorghum”
Claim · model-written summary
Potassium silicate with calcium and magnesium at 4 ml per pot significantly increased potassium absorption.
- Treatment
- K silicate with Ca and Mg at the dose of 4 ml.pot-1e0
- Outcome
- K absorptione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K silicate with Ca and Mg at the dose of 4 ml.pot-1, which also produced a significant increase in K absorption.”
t0“sorghum”
Claim · model-written summary
Calcium carbonate and magnesium oxide increased soil pH and lowered acidity and aluminium.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Calcium carbonate and magnesium oxide significantly increased soil pH and decreased exchangeable acidity and Al, and also increased Ca or Mg content in the soil.”
t0“sorghum”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.