Abstract
The effects of macronutrients on the development and nutritional status of sorghum plants were studied in sorghum plants grown in nutrient solutions. The experiment consisted of seven treatments in which the first was the standard Hoagland & Arnon (1950) nutrient solution and the next were obtained by excluding either N, or P, or K, or Ca, or Mg, or S from that solution. Three weeks after sowing, the plants were transferred to 8 L plastic containers and the mentioned treatments were then applied. Thirty days after transplanting, plant height , number of leaves, culm diameter, plant aerial part and root dry matter and the plants nutritional status were determined. The lack of N, P, Ca, and Mg was the most harmful to dry matter yield. The plants from the standard and the with omission solutions showed the following levels of nutrients in the aerial part, respectively : P = 4.8 and 0.6, K = 33.4 and 13.4, Mg = 3.8 and 0.4, S = 2.2 and 1.3 g kg and, in the roots P = 4.4 and 0.6, K = 26.2 and 6.3, Ca = 5.7 and 1.7 and S = 6.3 and 0.8 g kg. Nutrients omitted led to the decreasing of the level with which they occur in the aerial part of the plant as well as to an unbalance between the other nutrients which caused morphological modifications shown as typical deficiency symptoms. Key-words: Sorghum bicolor (L.) Moench, deficiency, nutrient, symptom
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Claims 5
Claim · model-written summary
Omission of N was among the most harmful for sorghum dry matter yield.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lack of N, P, Ca, and Mg was the most harmful to dry matter yield”
t0“sorghum plants”
Claim · model-written summary
Omission of P was among the most harmful for sorghum dry matter yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lack of N, P, Ca, and Mg was the most harmful to dry matter yield”
t0“sorghum plants”
Claim · model-written summary
Omission of Ca was among the most harmful for sorghum dry matter yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lack of N, P, Ca, and Mg was the most harmful to dry matter yield”
t0“sorghum plants”
Claim · model-written summary
Omission of Mg was among the most harmful for sorghum dry matter yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lack of N, P, Ca, and Mg was the most harmful to dry matter yield”
t0“sorghum plants”
Claim · model-written summary
Macronutrient omission reduced the corresponding nutrient level in sorghum aerial parts and produced nutrient imbalance and deficiency symptoms.
- Organ / stage
- aerial parte0
- Treatment
- Nutrients omittede0
- Outcome
- level with which they occur in the aerial part of the plante0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nutrients omitted led to the decreasing of the level with which they occur in the aerial part of the plant as well as to an unbalance between the other nutrients which caused morphological modifications shown as typical deficiency symptoms”
t0“sorghum plants”
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