Abstract
Influence of partial replacement of nitrate by amino acid and ammonium sulfate on nitrate content and nutritional quality of pakchoi (Brassica chinensis L.) was studied adopting hydroponics test. Partial replacement of nitrate by the mixture of glutamic acid and glutamine (Glu+Gln) had less influence on shoot fresh weight and dry weight of pakchoi; while Glu and ammonium sulfate markedly decreased fresh weight and Glu significantly reduced dry weight. Partial replacement of amino acids and ammonium sulfate all decreased content of the eatable part nitrate of pakchoi, while amino acids had better effect with GluGlnGlu+Gln in proper order. Partial replacement of amino acids all promoted the uptake of phosphorus and potassium nutrients by pakchoi. Gln promoted uptake of nitrogen, and all raised the contents of total nitrogen, phosphorus and potassium of shoot. Partial replacement of amino acid and ammonium sulfate all raised the pakchoi quality to different degree, in which except Glu+Gln treatment, all other treatments had a significantly higher soluble content than the contrast and the effect of (NH4)2SO4 was the best. Glu increased significantly the content of vitamin C, while others treatments could not increased significantly. All treatments, except Gln treatment, increased significantly free amino acid content, and the effect of Glu+Gln treatment was the best. Glu and Gln increased obviously the soluble protein content, while (NH4)2SO4 and Glu+Gln had no obvious influence on soluble protein content. The influence of amino acids and ammonium sulfate on nitrate content and nutritional quality of pakchoi was related to the enhancement of root activity, chlorophyll content, glutamate-oxaloacetate transaminase (GOT) and glutamate-pyruvate transaminase (GPT) activities.
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Claims 11
Claim · model-written summary
Glu reduced pakchoi fresh weight.
Not reportedComparator
Verbatim
e0“Glu and ammonium sulfate markedly decreased fresh weight”
t0“pakchoi”
Claim · model-written summary
Ammonium sulfate reduced pakchoi fresh weight.
Not reportedComparator
Verbatim
e0“Glu and ammonium sulfate markedly decreased fresh weight”
t0“pakchoi”
Claim · model-written summary
Glu significantly reduced dry weight.
Not reportedComparator
Verbatim
e0“Glu significantly reduced dry weight”
t0“pakchoi”
Claim · model-written summary
Amino acid substitution reduced edible-part nitrate.
- Taxon
- pakchoie0
- Treatment
- amino acidse0
- Outcome
- content of the eatable part nitratee0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Partial replacement of amino acids and ammonium sulfate all decreased content of the eatable part nitrate of pakchoi”
Claim · model-written summary
Ammonium sulfate substitution reduced edible-part nitrate.
- Taxon
- pakchoie0
- Treatment
- ammonium sulfatee0
- Outcome
- content of the eatable part nitratee0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Partial replacement of amino acids and ammonium sulfate all decreased content of the eatable part nitrate of pakchoi”
Claim · model-written summary
Amino acid substitution promoted uptake of phosphorus and potassium.
- Taxon
- pakchoie0
- Treatment
- amino acidse0
- Outcome
- uptake of phosphorus and potassium nutrientse0
- Direction
- promotede0
Not reportedComparator
Verbatim
e0“Partial replacement of amino acids all promoted the uptake of phosphorus and potassium nutrients by pakchoi”
Claim · model-written summary
Gln promoted nitrogen uptake.
Not reportedComparator
Verbatim
e0“Gln promoted uptake of nitrogen”
t0“pakchoi”
Claim · model-written summary
Treatments raised shoot nitrogen, phosphorus and potassium.
- Taxon
- pakchoit0
- Outcome
- contents of total nitrogen, phosphorus and potassium of shoote0
- Direction
- raisede0
Not reportedTreatmentComparator
Verbatim
e0“all raised the contents of total nitrogen, phosphorus and potassium of shoot”
t0“pakchoi”
Claim · model-written summary
Glu significantly raised vitamin C content.
Not reportedComparator
Verbatim
e0“Glu increased significantly the content of vitamin C”
t0“pakchoi”
Claim · model-written summary
Glu and Gln increased soluble protein content.
Not reportedComparator
Verbatim
e0“Glu and Gln increased obviously the soluble protein content”
t0“pakchoi”
Claim · model-written summary
Other treatments besides Gln significantly increased free amino acids.
- Taxon
- pakchoit0
- Treatment
- All treatments, except Gln treatmente0
- Outcome
- free amino acid contente0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“All treatments, except Gln treatment, increased significantly free amino acid content”
t0“pakchoi”
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ammonium sulfate · nutrient: content · Brassica rapa (field mustard)Results agree
1 paper in the same direction as this paper
- positive
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.