Abstract
Field experiments were conducted during 2015–16 and 2016–17 at Punjab Agricultural University, Ludhiana, to study the effect of staggered sowing on photosynthetic parameters, heat use efficiency and the productivity of barley (Hordium vulgare L.) in relation to different cutting management. The experiment was laid out in split plot design with three sowing dates (October 15, October 30 and November 15) in main plots and five cutting management [un-cut (control), cut at 50 days after sowing (DAS), cut at 60 DAS, cut at 50 DAS + additional 15 kg N ha-1 after cut (N15) and cut at 60 DAS + additional 15 kg N ha-1 after cut (N15)] in sub plots,replicated four times. The results indicated that photosynthetic parameters (PAR interception, chlorophyll index and normalized difference vegetation index) decreased significantly and progressively with each delay in sowing. Heat use efficiency and helio thermal use efficiency of October 15 and October 30 sown crops were statistically similar. Delay in sowing caused significant reduction in fodder, grain and biological yield of barley probably due to significant reduction in photosynthetic parameters.Nitrogen application after fodder cut improved the chlorophyll index, whereas, cutting did not influence the normalized difference vegetative index (NDVI).Un-cut crop recorded higher PAR interception.Significantly higher heat use efficiency and helio thermal use efficiency were recorded in uncutcrop. Un-cut and fodder cut at 50 DAS produced similar grain and biological yield and significantly higher than other cutting treatments. Cut at 60 DAS gave higher fodder yield but at the cost of 9.43-18.3 per cent reduction in grain yield than cut at 50 DAS. Correlation studies indicated significant positive correlation of grain yield with photosynthetic parameters, emphasizing the importance of higher growth and photosynthetic rate during reproductive period for best yield accrual from barley.
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Claims 11
Claim · model-written summary
Photosynthetic parameters decreased significantly with each sowing delay.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- delay in sowinge0
- Outcome
- photosynthetic parameters (PAR interception, chlorophyll index and normalized difference vegetation index)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“photosynthetic parameters (PAR interception, chlorophyll index and normalized difference vegetation index) decreased significantly and progressively with each delay in sowing”
t0“barley (Hordium vulgare L.)”
Claim · model-written summary
October 15 and October 30 sowings had statistically similar heat and helio thermal use efficiencies.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- October 15e0
- Outcome
- Heat use efficiency and helio thermal use efficiencye0
- Direction
- statistically similare0
- Comparator
- October 30e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat use efficiency and helio thermal use efficiency of October 15 and October 30 sown crops were statistically similar.”
t0“barley (Hordium vulgare L.)”
Claim · model-written summary
Delayed sowing significantly reduced fodder, grain and biological yields.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- Delay in sowinge0
- Outcome
- fodder, grain and biological yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delay in sowing caused significant reduction in fodder, grain and biological yield of barley”
t0“barley (Hordium vulgare L.)”
Claim · model-written summary
Nitrogen after fodder cutting improved chlorophyll index.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- Nitrogen application after fodder cute0
- Outcome
- chlorophyll indexe0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application after fodder cut improved the chlorophyll index”
t0“barley (Hordium vulgare L.)”
Claim · model-written summary
Cutting did not influence NDVI.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- cuttinge0
- Outcome
- normalized difference vegetative index (NDVI)e0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cutting did not influence the normalized difference vegetative index (NDVI)”
t0“barley (Hordium vulgare L.)”
Claim · model-written summary
Uncut barley had higher PAR interception.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- Un-cute0
- Outcome
- PAR interceptione0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Un-cut crop recorded higher PAR interception.”
t0“barley (Hordium vulgare L.)”
Claim · model-written summary
Uncut barley had significantly higher heat and helio thermal use efficiencies.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- uncutcrope0
- Outcome
- heat use efficiency and helio thermal use efficiencye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly higher heat use efficiency and helio thermal use efficiency were recorded in uncutcrop.”
t0“barley (Hordium vulgare L.)”
Claim · model-written summary
Uncut and 50-DAS-cut crops had similar grain and biological yields, both above other cutting treatments.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- Un-cut and fodder cut at 50 DASe0
- Outcome
- grain and biological yielde0
- Direction
- highere0
- Comparator
- other cutting treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Un-cut and fodder cut at 50 DAS produced similar grain and biological yield and significantly higher than other cutting treatments.”
t0“barley (Hordium vulgare L.)”
Claim · model-written summary
Cutting at 60 DAS gave higher fodder yield than cutting at 50 DAS.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- Cut at 60 DASe0
- Outcome
- fodder yielde0
- Direction
- highere0
- Comparator
- cut at 50 DASe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cut at 60 DAS gave higher fodder yield but at the cost of 9.43-18.3 per cent reduction in grain yield than cut at 50 DAS.”
t0“barley (Hordium vulgare L.)”
Claim · model-written summary
Cutting at 60 DAS reduced grain yield by 9.43-18.3 per cent against cutting at 50 DAS.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- Cut at 60 DASe0
- Outcome
- grain yielde0
- Direction
- reductione0
- Value
- 9.43-18.3 per cente0
- Comparator
- cut at 50 DASe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cut at 60 DAS gave higher fodder yield but at the cost of 9.43-18.3 per cent reduction in grain yield than cut at 50 DAS.”
t0“barley (Hordium vulgare L.)”
Claim · model-written summary
Grain yield was significantly positively correlated with photosynthetic parameters.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- grain yielde0
- Direction
- positivee0
- Qualifier
- photosynthetic parameterse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorTreatmentComparatorSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant positive correlation of grain yield with photosynthetic parameters”
t0“barley (Hordium vulgare L.)”
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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.