Abstract
Abstract The current study was implemented to assess the effect of nitrogen (N) timing application and cultivars and their interaction on grain yield, and the amount of pre-anthesis dry matter (DM) and N accumulation as well as the remobilization of the assimilates to sink (i.e. grain) under rain-fed conditions of West Asia and North Africa (WANA) region. The treatments comprised of six wheat cultivars and two methods of N application timing (single and split N application). Nitrogen was applied at a rate of 40 kg N ha−1 (the recommended rate in Jordan) as diamonumphosphate (DAP) just before planting (i.e. single N application) or 20 kg ha−1 before planting as DAP plus 20 kg ha−1 top dressed at early boot stage as urea (i.e. split N application). The results suggest that single N application was relatively better than split N application in improving DM accumulation in vegetative parts at anthesis and maturity stages, grain and biological yield and N translocation efficiency (NTE). Cultivar NTE ranged from 73–80%, and the contribution of pre-anthesis assimilates to grain from 26–63%, indicating the importance of pre-anthesis accumulated assimilates for attaining high yield under semi-arid rain-fed-conditions of WANA region. Keywords: nitrogen timing applicationgrain yieldbiological yieldcontribution of pre-anthesis assimilates to grain
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Claims 5
Claim · model-written summary
Single N application relatively improved dry matter accumulation in vegetative parts at anthesis and maturity compared with split N application in six wheat cultivars under rain-fed conditions.
- Taxon
- wheat
Triticum aestivume1 - Material
- six wheat cultivarse1
- Organ / stage
- vegetative partse2
- Treatment
- single N applicatione2
- Outcome
- DM accumulation in vegetative parts at anthesis and maturity stagese2
- Direction
- bettere2
- Comparator
- split N applicatione2
- Setting
- rain-fed conditions of West Asia and North Africa (WANA) regione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The treatments comprised of six wheat cultivars and two methods of N application timing (single and split N application)”
e2“single N application was relatively better than split N application in improving DM accumulation in vegetative parts at anthesis and maturity stages, grain and biological yield and N translocation efficiency (NTE)”
e3“under rain-fed conditions of West Asia and North Africa (WANA) region”
Claim · model-written summary
Single N application relatively improved grain and biological yield compared with split N application in wheat under rain-fed conditions.
- Taxon
- wheatTriticum aestivume1
- Material
- six wheat cultivarse1
- Treatment
- single N applicatione2
- Outcome
- grain and biological yielde2
- Direction
- bettere2
- Comparator
- split N applicatione2
- Setting
- rain-fed conditions of West Asia and North Africa (WANA) regione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The treatments comprised of six wheat cultivars and two methods of N application timing (single and split N application)”
e2“single N application was relatively better than split N application in improving DM accumulation in vegetative parts at anthesis and maturity stages, grain and biological yield and N translocation efficiency (NTE)”
e3“under rain-fed conditions of West Asia and North Africa (WANA) region”
Claim · model-written summary
Single N application relatively improved N translocation efficiency compared with split N application in wheat under rain-fed conditions.
- Taxon
- wheatTriticum aestivume1
- Material
- six wheat cultivarse1
- Treatment
- single N applicatione2
- Outcome
- N translocation efficiency (NTE)e2
- Direction
- bettere2
- Comparator
- split N applicatione2
- Setting
- rain-fed conditions of West Asia and North Africa (WANA) regione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The treatments comprised of six wheat cultivars and two methods of N application timing (single and split N application)”
e2“single N application was relatively better than split N application in improving DM accumulation in vegetative parts at anthesis and maturity stages, grain and biological yield and N translocation efficiency (NTE)”
e3“under rain-fed conditions of West Asia and North Africa (WANA) region”
Claim · model-written summary
Nitrogen translocation efficiency of the wheat cultivars ranged from 73 to 80 percent.
- Taxon
- wheatTriticum aestivume1
- Outcome
- Cultivar NTEe4
- Value
- 73–80%e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The treatments comprised of six wheat cultivars and two methods of N application timing (single and split N application)”
e4“Cultivar NTE ranged from 73–80%”
Claim · model-written summary
Pre-anthesis assimilates contributed 26 to 63 percent of grain in the wheat cultivars.
- Taxon
- wheatTriticum aestivume1
- Outcome
- contribution of pre-anthesis assimilates to graine5
- Value
- 26–63%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The treatments comprised of six wheat cultivars and two methods of N application timing (single and split N application)”
e5“the contribution of pre-anthesis assimilates to grain from 26–63%”
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