Abstract
In order to investigate the changes in chlorophyll fluorescence, chlorophyll, relative water content (RWC) and forage yield of corn and sorghum under various irrigation regimes and combination treatments of barley residue, zeolite and superabsorbent polymer, an experiment was conducted over 2 years in Kerman, Iran. A randomized complete block design arranged in a factorial split was used with three replications. Two irrigation regimes of normal and drought stress based on 70 and 140 mm cumulative pan evaporation, respectively, and two plant species (corn and sorghum) as factorial combinations were compared in the main plots. Five treatments, (1) 10 t ha−1 zeolite + 4.5 t ha−1 residue, (2) 60 kg ha−1 superabsorbent + 4.5 t ha−1 residue, (3) 5 t ha−1 zeolite + 30 kg ha−1 superabsorbent + 4.5 t ha−1 residue, (4) 4.5 t ha−1 residue and (5) – control, were compared in subplots. In both plants, forage yield, potential quantum yield (Fv/Fm), chlorophyll a, total chlorophyll and carotenoid contents decreased significantly under drought stress. Chlorophyll a content, SPAD index and Fv/Fm were higher in corn than in sorghum, but RWC was higher in sorghum. Corn produced higher forage yield (62.8 t ha−1) than sorghum (49.3 t ha−1). The application of 10 t ha−1 zeolite with 4.5 t ha−1 residue increased most traits more than any of the other treatments, but the superabsorbent had no significant effect on the studied traits.
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Claims 12
Claim · model-written summary
forage yield decreased under drought stress in corn and sorghum.
- Taxon
- corn and sorghum
Sorghum
Zea mays subsp. mayst0 - Treatment
- drought stresse0
- Outcome
- forage yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both plants, forage yield, potential quantum yield (Fv/Fm), chlorophyll a, total chlorophyll and carotenoid contents decreased significantly under drought stress.”
t0“corn and sorghum”
Claim · model-written summary
potential quantum yield (Fv/Fm) decreased under drought stress in corn and sorghum.
- Taxon
- corn and sorghumSorghumZea mays subsp. mayst0
- Treatment
- drought stresse0
- Outcome
- potential quantum yield (Fv/Fm)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both plants, forage yield, potential quantum yield (Fv/Fm), chlorophyll a, total chlorophyll and carotenoid contents decreased significantly under drought stress.”
t0“corn and sorghum”
Claim · model-written summary
chlorophyll a decreased under drought stress in corn and sorghum.
- Taxon
- corn and sorghumSorghumZea mays subsp. mayst0
- Treatment
- drought stresse0
- Outcome
- chlorophyll ae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both plants, forage yield, potential quantum yield (Fv/Fm), chlorophyll a, total chlorophyll and carotenoid contents decreased significantly under drought stress.”
t0“corn and sorghum”
Claim · model-written summary
total chlorophyll decreased under drought stress in corn and sorghum.
- Taxon
- corn and sorghumSorghumZea mays subsp. mayst0
- Treatment
- drought stresse0
- Outcome
- total chlorophylle0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both plants, forage yield, potential quantum yield (Fv/Fm), chlorophyll a, total chlorophyll and carotenoid contents decreased significantly under drought stress.”
t0“corn and sorghum”
Claim · model-written summary
carotenoid contents decreased under drought stress in corn and sorghum.
- Taxon
- corn and sorghumSorghumZea mays subsp. mayst0
- Treatment
- drought stresse0
- Outcome
- carotenoid contentse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both plants, forage yield, potential quantum yield (Fv/Fm), chlorophyll a, total chlorophyll and carotenoid contents decreased significantly under drought stress.”
t0“corn and sorghum”
Claim · model-written summary
Chlorophyll a content was higher in corn than in sorghum.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- Chlorophyll a contente0
- Direction
- highere0
- Comparator
- sorghume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll a content, SPAD index and Fv/Fm were higher in corn than in sorghum, but RWC was higher in sorghum.”
Claim · model-written summary
SPAD index was higher in corn than in sorghum.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- SPAD indexe0
- Direction
- highere0
- Comparator
- sorghume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll a content, SPAD index and Fv/Fm were higher in corn than in sorghum, but RWC was higher in sorghum.”
Claim · model-written summary
Fv/Fm was higher in corn than in sorghum.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- Fv/Fme0
- Direction
- highere0
- Comparator
- sorghume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll a content, SPAD index and Fv/Fm were higher in corn than in sorghum, but RWC was higher in sorghum.”
Claim · model-written summary
RWC was higher in sorghum than corn.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll a content, SPAD index and Fv/Fm were higher in corn than in sorghum, but RWC was higher in sorghum.”
Claim · model-written summary
Corn had higher forage yield than sorghum.
- Taxon
- CornZea mays subsp. mayse0
- Outcome
- forage yielde0
- Direction
- highere0
- Value
- 62.8 t ha−1e0
- Qualifier
- 49.3 t ha−1e0
- Comparator
- sorghume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn produced higher forage yield (62.8 t ha−1) than sorghum (49.3 t ha−1).”
Claim · model-written summary
Zeolite with residue increased most traits more than other treatments.
- Taxon
- corn and sorghumSorghumZea mays subsp. mayst0
- Treatment
- 10 t ha−1 zeolite with 4.5 t ha−1 residuee0
- Outcome
- most traitse0
- Direction
- increasede0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 10 t ha−1 zeolite with 4.5 t ha−1 residue increased most traits more than any of the other treatments, but the superabsorbent had no significant effect on the studied traits.”
t0“corn and sorghum”
Claim · model-written summary
Superabsorbent had no significant effect on the studied traits.
- Taxon
- corn and sorghumSorghumZea mays subsp. mayst0
- Treatment
- superabsorbente0
- Outcome
- studied traitse0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 10 t ha−1 zeolite with 4.5 t ha−1 residue increased most traits more than any of the other treatments, but the superabsorbent had no significant effect on the studied traits.”
t0“corn and sorghum”
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