Abstract
Abstract Leaf and root samples were collected from experimental blocks treated with different levels of nitrogen and potassium (NK) and analyzed for nitrate reductase (NR) activity. It was inferred that in a tea shoot consisting of three leaves and a bud, the NR activity was higher in first leaf followed by third leaf and feeder roots. Increase in NR activity was noted due to the increase in N or K fertilizer doses. There existed a significant correlation between green leaf yield and NR activity recorded at first and second harvesting rounds after manuring. Activity observed at the Anamallais was slightly higher than that seen in the Nilgiris. The activity was maximum on the seventh day after fertilizer application and it was considerably high up to 28th day, which revealed that the minimum interval between two successive NK fertilizer applications should be one month. The N:K2O ratio 1:1 appears to be optimum when 300/450 kg of N as urea (or) K2O as muriate of potash ha−1 yr−1 was used. Keywords: NR activityNK fertilizer dosesAmino acids Acknowledgments The authors are very much grateful to Dr. N. Muraleedharan, Director, UPASI TRF, for his encouragements through out the study and for critically evaluating this manuscript. We would like to thank Dr. D. P. Verma, Director-Technical, IMT Technologies Pvt. Ltd. for guiding us to conduct this study. Our thanks are also due to the National Tea Research Foundation, Government of India, for the financial assistance.
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Claims 8
Claim · model-written summary
NR activity was highest in the first leaf, then third leaf and feeder roots.
Verbatim
e0“NR activity was higher in first leaf followed by third leaf and feeder roots”
t0“Tea”
Claim · model-written summary
Increasing N fertilizer dose increased NR activity.
Not reportedComparator
Verbatim
e0“Increase in NR activity was noted due to the increase in N or K fertilizer doses”
t0“Tea”
Claim · model-written summary
Increasing K fertilizer dose increased NR activity.
Not reportedComparator
Verbatim
e0“Increase in NR activity was noted due to the increase in N or K fertilizer doses”
t0“Tea”
Claim · model-written summary
Green leaf yield and NR activity were significantly correlated in the first and second harvesting rounds after manuring.
Not reportedDirection
Verbatim
e0“significant correlation between green leaf yield and NR activity recorded at first and second harvesting rounds after manuring”
t0“Tea”
Claim · model-written summary
NR activity was slightly higher at Anamallais than Nilgiris.
Verbatim
e0“Activity observed at the Anamallais was slightly higher than that seen in the Nilgiris”
t0“Tea”
e1“nitrate reductase (NR) activity”
Claim · model-written summary
NR activity peaked on day seven after fertilization and stayed high through day 28.
Verbatim
e0“The activity was maximum on the seventh day after fertilizer application and it was considerably high up to 28th day”
e1“nitrate reductase (NR) activity”
t0“Tea”
Claim · model-written summary
The authors recommend at least one month between NK applications.
Verbatim
e0“minimum interval between two successive NK fertilizer applications should be one month”
t0“Tea”
Claim · model-written summary
The authors identify a 1:1 N:K2O ratio as optimum at the stated rate.
Verbatim
e0“The N:K2O ratio 1:1 appears to be optimum when 300/450 kg of N as urea (or) K2O as muriate of potash ha−1 yr−1 was used”
t0“Tea”
The same questions in other papers
nitrogen · physiology: enzyme activity · Camellia sinensis (black tea)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- 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.