Abstract
The effect of thermal condition on the uptake of autumn and winter applied N and its subsequent utilization in spring tea (Camellia sinensis) was investigated by applying 15N enriched urea as single or split applications between October and February in two commercial plantations at Xingyang of Henan province and Yongchuan of Chongqing with different thermal conditions. The proportion of N derived from 15N-labeled urea (Ndff%) in fibrous root and mature leaves 15 days after application at Xingyang and the Ndff% of mature leaves on the day of the first spring tea harvest at both sites were the highest in the single October application. The Ndff% of the following spring tea was also the highest in the single October application at both sites. The results showed that application of N fertilizer in October relative to other later months most significantly improves the accumulation of plant N reserves and consequently contributes more significantly to the early spring tea. Such timing effect was related to the thermal condition, i.e., the growing degree days (°C•d, T > 8 °C) between the dates of fertilization and harvest of young shoots, which represents the combining effect of the temperature and the residence time of N fertilizer in the soil.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
At Xingyang, the proportion of N derived from 15N-urea in fibrous root and mature leaves 15 days after application was highest with the single October application.
- Taxon
- Camellia sinensis
Camellia sinensist0 - Organ / stage
- fibrous root and mature leavese0
- Treatment
- single October applicatione0
- Outcome
- proportion of N derived from 15N-labeled urea (Ndff%)e0
- Direction
- higheste0
- Qualifier
- 15 days after applicatione0
- Setting
- Xingyange0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Tea (Camellia sinensis L.)”
e0“The proportion of N derived from 15N-labeled urea (Ndff%) in fibrous root and mature leaves 15 days after application at Xingyang and the Ndff% of mature leaves on the day of the first spring tea harvest at both sites were the highest in the single October application”
Claim · model-written summary
At both sites, Ndff% of mature leaves on the day of the first spring tea harvest was highest with the single October application.
- Taxon
- Camellia sinensisCamellia sinensist0
- Organ / stage
- mature leavese0
- Treatment
- single October applicatione0
- Outcome
- Ndff% of mature leavese0
- Direction
- higheste0
- Qualifier
- on the day of the first spring tea harveste0
- Setting
- both sitese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Tea (Camellia sinensis L.)”
e0“The proportion of N derived from 15N-labeled urea (Ndff%) in fibrous root and mature leaves 15 days after application at Xingyang and the Ndff% of mature leaves on the day of the first spring tea harvest at both sites were the highest in the single October application”
Claim · model-written summary
Ndff% of the following spring tea was highest with the single October application at both sites.
- Taxon
- Camellia sinensisCamellia sinensist0
- Treatment
- single October applicatione1
- Outcome
- Ndff% of the following spring teae1
- Direction
- higheste1
- Setting
- both sitese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Tea (Camellia sinensis L.)”
e1“The Ndff% of the following spring tea was also the highest in the single October application at both sites”
Claim · model-written summary
The authors conclude that October N fertilizer application, relative to later months, most significantly improves the accumulation of plant N reserves in tea.
- Taxon
- Camellia sinensisCamellia sinensist0
- Treatment
- application of N fertilizer in Octobere2
- Outcome
- accumulation of plant N reservese2
- Direction
- improvese2
- Comparator
- other later monthse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Tea (Camellia sinensis L.)”
e2“application of N fertilizer in October relative to other later months most significantly improves the accumulation of plant N reserves and consequently contributes more significantly to the early spring tea”
Claim · model-written summary
The authors conclude that October N application, relative to later months, contributes more significantly to the early spring tea.
- Taxon
- Camellia sinensisCamellia sinensist0
- Treatment
- application of N fertilizer in Octobere2
- Outcome
- early spring teae2
- Direction
- more significantlye2
- Comparator
- other later monthse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Tea (Camellia sinensis L.)”
e2“application of N fertilizer in October relative to other later months most significantly improves the accumulation of plant N reserves and consequently contributes more significantly to the early spring tea”
Claim · model-written summary
The timing effect of N application on spring tea was related to the thermal condition (growing degree days between fertilization and harvest).
- Taxon
- Camellia sinensisCamellia sinensist0
- Treatment
- thermal conditione3
- Outcome
- timing effecte3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Tea (Camellia sinensis L.)”
e3“Such timing effect was related to the thermal condition”
The same questions in other papers
nitrogen · molecular: metabolites · Camellia sinensis (black tea)Positive and negative results
11 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
9 papers more in this group
See all 13 papers →fertilization · molecular: metabolites · Camellia sinensis (black tea)Positive and negative results
16 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- positive
14 papers more in this group
See all 18 papers →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.