Abstract
We studied the absorbing ability of the man ure components of the tea leaf, using urea mainly, from 1951 to 1952. The summerized results are as follows. The effect of foliage spray with urea on the growth of the tea plant was not seen, although the spraying of 0.5% solution was repeated seven times.We recognized that the suitable period of the foliage spray was 2 or 3 days before pluc-king, after tracing the daily variations of growth and the total nitrogen content of the tea leaves. Total-N, soluble-N, caffeine-N, residual soluble-N were increased by the foliage spray with urea of 0.5% solution. Chlorophyll and caro-tenoid showed the same tendency.The foliage spray of 4 mixtures, containing N, P, K, and Mn, was carried out, but its effect was not distinct. The sbsorbing ability of the leaf surface was greater on its upper side than on the back side. Any injured leaf was not seen by the foliage spray, unless using more than 0.5% solution of urea and other manures used in this exp-eriment. It was harmless to use urea mixed with the common insecticides and fungicides on the tea cultivation.
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Claims 9
Claim · model-written summary
Repeated 0.5% urea spray showed no effect on tea growth.
- Taxon
- tea plante0
- Treatment
- foliage spray with ureae0
- Outcome
- growth of the tea plante0
- Direction
- not seene0
- Qualifier
- 0.5% solutione0
Not reportedComparator
Verbatim
e0“The effect of foliage spray with urea on the growth of the tea plant was not seen, although the spraying of 0.5% solution was repeated seven times.”
Claim · model-written summary
The suitable foliar spray period was two or three days before plucking.
Verbatim
e0“the suitable period of the foliage spray was 2 or 3 days before pluc-king”
t0“Tea Plant”
Claim · model-written summary
Foliar urea increased total and soluble nitrogen measures in tea leaves.
- Taxon
- Tea Plantt0
- Treatment
- foliage spray with urea of 0.5% solutione0
- Outcome
- Total-N, soluble-N, caffeine-Ne0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Total-N, soluble-N, caffeine-N, residual soluble-N were increased by the foliage spray with urea of 0.5% solution.”
t0“Tea Plant”
Claim · model-written summary
Foliar urea increased residual soluble nitrogen in tea leaves.
- Taxon
- Tea Plantt0
- Treatment
- foliage spray with urea of 0.5% solutione0
- Outcome
- residual soluble-Ne0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Total-N, soluble-N, caffeine-N, residual soluble-N were increased by the foliage spray with urea of 0.5% solution.”
t0“Tea Plant”
Claim · model-written summary
Chlorophyll and carotenoid followed the same increasing tendency.
Not reportedDirection
Verbatim
e0“Chlorophyll and caro-tenoid showed the same tendency.”
t0“Tea Plant”
Claim · model-written summary
Effects of four N, P, K, and Mn spray mixtures were indistinct.
- Taxon
- Tea Plantt0
- Treatment
- foliage spray of 4 mixtures, containing N, P, K, and Mne0
- Outcome
- effecte0
- Direction
- not distincte0
Not reportedComparator
Verbatim
e0“The foliage spray of 4 mixtures, containing N, P, K, and Mn, was carried out, but its effect was not distinct.”
t0“Tea Plant”
Claim · model-written summary
The tea leaf upper surface absorbed more than the back surface.
Verbatim
e0“The sbsorbing ability of the leaf surface was greater on its upper side than on the back side.”
t0“Tea Plant”
Claim · model-written summary
Foliar spray caused no visible leaf injury unless concentration exceeded 0.5%.
- Taxon
- Tea Plantt0
- Treatment
- foliage spraye0
- Outcome
- injured leafe0
- Direction
- not seene0
- Qualifier
- more than 0.5% solutione0
Not reportedComparator
Verbatim
e0“Any injured leaf was not seen by the foliage spray, unless using more than 0.5% solution of urea and other manures used in this exp-eriment.”
t0“Tea Plant”
Claim · model-written summary
The authors judged mixing urea with common insecticides and fungicides harmless in tea cultivation.
Verbatim
e0“It was harmless to use urea mixed with the common insecticides and fungicides on the tea cultivation.”
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