Abstract
A sand culture study was conducted with 12 treatments. Sieved, acid washed and autoclaved sand was used to exclude microbial contamination. Five amino acids viz., glutamic acid, aspartic acid, glycine, cystine, tryptophan and their mixture as nitrogen source in Hoagland solution which served as the reference treatment and also as a source of all other nutrients. There were treatments where 50% nitrogen was supplied through Hoagland and remaining 50% was through glutamic acid, glycine and their mixture. Green and dry foliage yield, root biomass and photosynthetic rate were highest with Hoagland solution indicating that inorganic nitrogen was most suited. About 50 to 95% dry matter yield obtained by Hoagland solution could be produced by amino acids. An incubation study with the same sand used in the above pot study indicated that the nitrification rate of amino acids was 14 to 30% at 30 days, suggesting the direct absorption of amino acids by maize plant. Nutrient contents in the leaf and their uptake by the plant showed that their values were within the normal range irrespective of their nitrogen source. Maximum sulphur content was obtained when cystine was the sole source of nitrogen. Inclusion of 50% nitrogen as inorganic nitrogen or foliar spray of 1% amino acid did not have any distinct advantage in utilization of organic nitrogen. The results showed that the inorganic nitrogen was utilized better than that of organic nitrogen. At the same time, fairly good amount of organic nitrogen was absorbed and utilized.
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Claims 9
Claim · model-written summary
Hoagland solution produced highest foliage yield, root biomass and photosynthesis.
- Treatment
- Hoagland solutione0
- Outcome
- Green and dry foliage yield, root biomass and photosynthetic ratee0
- Direction
- higheste0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plant”
e0“Green and dry foliage yield, root biomass and photosynthetic rate were highest with Hoagland solution”
Claim · model-written summary
Amino acids produced 50 to 95% of the dry matter yield obtained with Hoagland solution.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plant”
e0“About 50 to 95% dry matter yield obtained by Hoagland solution could be produced by amino acids”
Claim · model-written summary
Amino acid nitrification reached 14 to 30% at 30 days in incubation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plant”
e0“the nitrification rate of amino acids was 14 to 30% at 30 days”
Claim · model-written summary
The authors infer direct amino acid absorption by maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting the direct absorption of amino acids by maize plant”
Claim · model-written summary
Leaf nutrient content and plant uptake were normal regardless of nitrogen source.
- Outcome
- Nutrient contents in the leaf and their uptake by the plante0
- Qualifier
- within the normal range irrespective of their nitrogen sourcee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plant”
e0“Nutrient contents in the leaf and their uptake by the plant showed that their values were within the normal range irrespective of their nitrogen source”
Claim · model-written summary
Cystine as sole nitrogen source produced maximum sulphur content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plant”
e0“Maximum sulphur content was obtained when cystine was the sole source of nitrogen”
Claim · model-written summary
Half inorganic nitrogen or a 1% amino acid spray gave no distinct advantage for organic nitrogen utilization.
- Treatment
- Inclusion of 50% nitrogen as inorganic nitrogen or foliar spray of 1% amino acide0
- Outcome
- utilization of organic nitrogene0
- Direction
- did not have any distinct advantagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plant”
e0“Inclusion of 50% nitrogen as inorganic nitrogen or foliar spray of 1% amino acid did not have any distinct advantage in utilization of organic nitrogen”
Claim · model-written summary
Inorganic nitrogen was utilized better than organic nitrogen.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plant”
e0“the inorganic nitrogen was utilized better than that of organic nitrogen”
Claim · model-written summary
A substantial amount of organic nitrogen was absorbed and utilized.
- Outcome
- organic nitrogen was absorbed and utilizede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plant”
e0“fairly good amount of organic nitrogen was absorbed and utilized”