Abstract
The objective of this work was to evaluate the effect of omission of macronutrients in the growth and the nutritional state of elephant-grass plants (Pennisetum purpureum Shum cv. Mott). The experiment was developed in the FCAV/UNESP, in Jaboticabal-SP,Brazil, using nutrient solution. The experimental design was completely randomized blocks, with seven treatments (the complete solution proposed by Hoagland & Amon (1950) and the individual omission of N, P, K, Ca, Mg and S, in these solution), in three repetitions. Pre-germinated plants were placed in pot (5 dm3), containing the nutrient solution, which was aerated constantly during the experimental period and the respective treatments, with three replications each. Weekly, the height of the plants, the leaf number, apex diameter and number of tillers were evaluated as well as plant nutritional state. The omission of N, P, K, Ca, Mg and S limited the production of dry weight of shoot the elephant grass, compared to the full treatment. The deficiency of a macronutrient, in addition to promoting reduction of its content in the shoot, resulted in reducing the accumulation of most macronutrients, with resultant morphological changes, translated as characteristic symptoms of deficiency.
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Claims 4
Claim · model-written summary
Omission of N, P, K, Ca, Mg or S limited shoot dry weight of elephant grass compared with the full nutrient solution.
- Taxon
- Pennisetum purpureum
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Cenchrus purpureuse1 - Material
- cv. Motte1
- Treatment
- omission of N, P, K, Ca, Mg and Se2
- Outcome
- production of dry weight of shoote2
- Direction
- limitede2
- Comparator
- full treatmente2
- Setting
- nutrient solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The experiment was developed in the FCAV/UNESP, in Jaboticabal-SP,Brazil, using nutrient solution”
e1“elephant-grass plants (Pennisetum purpureum Shum cv. Mott)”
e2“The omission of N, P, K, Ca, Mg and S limited the production of dry weight of shoot the elephant grass, compared to the full treatment”
Claim · model-written summary
Deficiency of a macronutrient reduced its content in the shoot.
- Taxon
- Pennisetum purpureumCenchrus purpureuse1
- Material
- cv. Motte1
- Treatment
- deficiency of a macronutriente3
- Outcome
- its content in the shoote3
- Direction
- reductione3
- Setting
- nutrient solutione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The experiment was developed in the FCAV/UNESP, in Jaboticabal-SP,Brazil, using nutrient solution”
e1“elephant-grass plants (Pennisetum purpureum Shum cv. Mott)”
e3“The deficiency of a macronutrient, in addition to promoting reduction of its content in the shoot”
Claim · model-written summary
Macronutrient deficiency reduced the accumulation of most macronutrients in elephant grass.
- Taxon
- Pennisetum purpureumCenchrus purpureuse1
- Material
- cv. Motte1
- Treatment
- deficiency of a macronutriente3
- Outcome
- accumulation of most macronutrientse4
- Direction
- reducinge4
- Setting
- nutrient solutione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The experiment was developed in the FCAV/UNESP, in Jaboticabal-SP,Brazil, using nutrient solution”
e1“elephant-grass plants (Pennisetum purpureum Shum cv. Mott)”
e3“The deficiency of a macronutrient, in addition to promoting reduction of its content in the shoot”
e4“resulted in reducing the accumulation of most macronutrients”
Claim · model-written summary
Macronutrient deficiency produced morphological changes that are characteristic symptoms of deficiency.
- Taxon
- Pennisetum purpureumCenchrus purpureuse1
- Material
- cv. Motte1
- Outcome
- morphological changese5
- Qualifier
- characteristic symptoms of deficiencye5
- Setting
- nutrient solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The experiment was developed in the FCAV/UNESP, in Jaboticabal-SP,Brazil, using nutrient solution”
e1“elephant-grass plants (Pennisetum purpureum Shum cv. Mott)”
e5“with resultant morphological changes, translated as characteristic symptoms of deficiency”
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This paper is about lacking the nutrient, so it counts the other way round here.
- negative
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This paper is about lacking the nutrient, so it counts the other way round here.
- positive
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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.