Abstract
Greenhouse research was conducted to determine the effects of soil application of humus, on dry matter and N, P, K, Ca, Mg, Fe, Cu, Zn, Mn and Na uptake of maize grown under calcareous and saline soil conditions. Stress conditions were obtained by adding 40% CaCO3 and 60 mM NaCl to the soil. Humus was applied to the soils at 0, 1 and 2 g kg-1 doses at the beginning of the treatment. Solid humus and CaCO3 were mixed according to the application doses, and the total weight of the soil was adjusted to 5 kg. The mixture was homogenised and put into polyethylene-covered plastic pots (20 x 18 cm). A 60 mM NaCl solution was added to the salt-treated pots. CaCO3 and NaCl both negatively affected the plants’ growth, lowering the dry weights of the plants due to the stress, and decreasing the mineral nutrient amounts, except for sodium. Although the application of humus had no apparent affects on the control pots, which received no lime or salt applications, the humus applications had significant effects under the calcareous and saline conditions. The lower application dose of humus elevated the dry matter yield and some nutrient element uptakes under the stress conditions. The increases at the higher dose were found to be smaller than those at the lower dose of humus except for potassium and calcium uptake. Soil application of humus could minimise the negative effects of saline and calcareous soil conditions on nutrient uptake and plant development but further studies are required to determine economical application levels.
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Claims 6
Claim · model-written summary
CaCO3 and NaCl stress lowered maize dry weight compared with control pots.
- Treatment
- 40% CaCO3 and 60 mM NaCle2
- Outcome
- dry weightse3
- Direction
- loweringe3
- Comparator
- control potse4
- Setting
- Greenhousee1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse research was conducted to determine the effects of soil application of humus, on dry matter and N, P, K, Ca, Mg, Fe, Cu, Zn, Mn and Na uptake of maize grown under calcareous and saline soil conditions”
e2“Stress conditions were obtained by adding 40% CaCO3 and 60 mM NaCl to the soil”
e3“CaCO3 and NaCl both negatively affected the plants’ growth, lowering the dry weights of the plants due to the stress, and decreasing the mineral nutrient amounts, except for sodium”
e4“Although the application of humus had no apparent affects on the control pots, which received no lime or salt applications”
Claim · model-written summary
CaCO3 and NaCl stress decreased mineral nutrient amounts in maize, except for sodium.
- Treatment
- CaCO3 and NaCle3
- Outcome
- mineral nutrient amountse3
- Direction
- decreasinge3
- Qualifier
- except for sodiume3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse research was conducted to determine the effects of soil application of humus, on dry matter and N, P, K, Ca, Mg, Fe, Cu, Zn, Mn and Na uptake of maize grown under calcareous and saline soil conditions”
e3“CaCO3 and NaCl both negatively affected the plants’ growth, lowering the dry weights of the plants due to the stress, and decreasing the mineral nutrient amounts, except for sodium”
Claim · model-written summary
Humus had no apparent effect on dry matter of maize in control pots without lime or salt.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse research was conducted to determine the effects of soil application of humus, on dry matter and N, P, K, Ca, Mg, Fe, Cu, Zn, Mn and Na uptake of maize grown under calcareous and saline soil conditions”
e4“Although the application of humus had no apparent affects on the control pots, which received no lime or salt applications”
Claim · model-written summary
A lower humus dose elevated dry matter yield and some nutrient uptakes under stress conditions.
- Treatment
- lower application dose of humuse5
- Outcome
- dry matter yield and some nutrient element uptakese5
- Direction
- elevatede5
- Qualifier
- under the stress conditionse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse research was conducted to determine the effects of soil application of humus, on dry matter and N, P, K, Ca, Mg, Fe, Cu, Zn, Mn and Na uptake of maize grown under calcareous and saline soil conditions”
e5“The lower application dose of humus elevated the dry matter yield and some nutrient element uptakes under the stress conditions”
Claim · model-written summary
The higher humus dose gave smaller increases than the lower dose, except for potassium and calcium uptake.
- Treatment
- higher dosee6
- Outcome
- increasese6
- Direction
- smallere6
- Qualifier
- except for potassium and calcium uptakee6
- Comparator
- lower dose of humuse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse research was conducted to determine the effects of soil application of humus, on dry matter and N, P, K, Ca, Mg, Fe, Cu, Zn, Mn and Na uptake of maize grown under calcareous and saline soil conditions”
e6“The increases at the higher dose were found to be smaller than those at the lower dose of humus except for potassium and calcium uptake”
Claim · model-written summary
Soil application of humus could minimise the negative effects of saline and calcareous soil conditions on nutrient uptake and plant development.
- Treatment
- Soil application of humuse7
- Outcome
- negative effectse7
- Direction
- minimisee7
- Qualifier
- on nutrient uptake and plant developmente7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse research was conducted to determine the effects of soil application of humus, on dry matter and N, P, K, Ca, Mg, Fe, Cu, Zn, Mn and Na uptake of maize grown under calcareous and saline soil conditions”
e7“Soil application of humus could minimise the negative effects of saline and calcareous soil conditions on nutrient uptake and plant development”
The same questions in other papers
calcium carbonate · growth · Zea mays (maize)Results differ
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See all 8 papers →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.