Abstract
To investigate the effects of fertilizer ratio on leaves area,chlorophyll content,and key enzymes of nitrogen metabolism under water stress in grape,Centennial Seedless was used with three different water treatment levels and three kinds of fertilizer ratios. The results showed that at the germination and fruit-set stages,a water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2∶ 5∶ 3 could effectively increase the leaves area and the chlorophyll content of grape leaves,and could also effectively improve the photosynthetic rate. At the color-changing and post-harvesting stages,maintenance of normal water content and proper increase of potassium could improve photosynthetic rate. A water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2 ∶ 5 ∶ 3 could effectively enhance the NR activity and promote the absorption and utilization of nitrogen fertilizer. The GS activity became increased first and was then decreased by water stress,whereas the GPT activity kept increased. At mild stress level,increase of potassium fertilizer could lead to the elevation of NR,GPT and GS activities,improving the transformation and utilization of nitrogen fertilizer.
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Claims 10
Claim · model-written summary
The specified water and N:P:K treatments increased grape leaf area at germination and fruit set.
- Taxon
- grapee0
- Organ / stage
- germination and fruit-set stagese0
- Treatment
- a water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2∶ 5∶ 3e0
- Outcome
- leaves areae0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“at the germination and fruit-set stages,a water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2∶ 5∶ 3 could effectively increase the leaves area and the chlorophyll content of grape leaves”
Claim · model-written summary
The specified water and N:P:K treatments increased grape leaf chlorophyll at germination and fruit set.
- Taxon
- grapee0
- Treatment
- a water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2∶ 5∶ 3e0
- Outcome
- chlorophyll content of grape leavese0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“at the germination and fruit-set stages,a water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2∶ 5∶ 3 could effectively increase the leaves area and the chlorophyll content of grape leaves”
Claim · model-written summary
The specified water and N:P:K treatments improved grape photosynthetic rate.
- Taxon
- grapee0
- Treatment
- a water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2∶ 5∶ 3e0
- Outcome
- photosynthetic ratee0
- Direction
- improvee0
Not reportedComparator
Verbatim
e0“a water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2∶ 5∶ 3 could effectively increase the leaves area and the chlorophyll content of grape leaves,and could also effectively improve the photosynthetic rate.”
Claim · model-written summary
Normal water content and more potassium improved photosynthetic rate during color change and after harvest.
- Taxon
- grapet0
- Organ / stage
- color-changing and post-harvesting stagese0
- Treatment
- maintenance of normal water content and proper increase of potassiume0
- Outcome
- photosynthetic ratee0
- Direction
- improvee0
Not reportedComparator
Verbatim
t0“grape”
e0“At the color-changing and post-harvesting stages,maintenance of normal water content and proper increase of potassium could improve photosynthetic rate.”
Claim · model-written summary
The specified water and N:P:K treatments enhanced NR activity.
- Taxon
- grapet0
- Treatment
- A water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2 ∶ 5 ∶ 3e0
- Gene
- NRe0
- Outcome
- NR activitye0
- Direction
- enhancee0
Not reportedComparator
Verbatim
t0“grape”
e0“A water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2 ∶ 5 ∶ 3 could effectively enhance the NR activity and promote the absorption and utilization of nitrogen fertilizer.”
Claim · model-written summary
The specified water and N:P:K treatments promoted nitrogen fertilizer absorption and utilization.
- Taxon
- grapet0
- Treatment
- A water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2 ∶ 5 ∶ 3e0
- Outcome
- absorption and utilization of nitrogen fertilizere0
- Direction
- promotee0
Not reportedComparator
Verbatim
t0“grape”
e0“A water treatment using 55% ~ 60% that of the field capacity and a fertilizer ratio of N∶ P∶ K = 2 ∶ 5 ∶ 3 could effectively enhance the NR activity and promote the absorption and utilization of nitrogen fertilizer.”
Claim · model-written summary
Under water stress GS activity initially increased and then decreased.
Verbatim
t0“grape”
e0“The GS activity became increased first and was then decreased by water stress”
Claim · model-written summary
Under water stress GPT activity kept increasing.
Verbatim
t0“grape”
e0“whereas the GPT activity kept increased.”
Claim · model-written summary
Added potassium at mild stress elevated NR, GPT and GS activities.
- Taxon
- grapet0
- Treatment
- increase of potassium fertilizere0
- Outcome
- NR,GPT and GS activitiese0
- Direction
- elevatione0
- Qualifier
- mild stress levele0
Not reportedComparator
Verbatim
t0“grape”
e0“At mild stress level,increase of potassium fertilizer could lead to the elevation of NR,GPT and GS activities”
Claim · model-written summary
Added potassium at mild stress improved nitrogen fertilizer transformation and utilization.
- Taxon
- grapet0
- Treatment
- increase of potassium fertilizere0
- Outcome
- transformation and utilization of nitrogen fertilizere0
- Direction
- improvinge0
- Qualifier
- mild stress levele0
Not reportedComparator
Verbatim
t0“grape”
e0“At mild stress level,increase of potassium fertilizer could lead to the elevation of NR,GPT and GS activities,improving the transformation and utilization of nitrogen fertilizer.”
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