Abstract
Drought stress has an important role in yield reduction of crops. To investigate the effects of applying zeolite hydrogel (as a superabsorbent) in reduction of adverse effects of drought stress on chlorophyll content, nitrogen, growth indices and their relationships with quantitative and qualitative yield of pearl millet (cv. Nitrifeed), a split plot experiment (in space and time), based on randomized complete blocks design with three replications, was carried out at Research Farm of Shahid Bahonar University, Kerman, Iran, in 2011. Treatments included drought stress at four levels (irrigation at 40, 60, 80 and 100% of field capacity) as the main factor and superabsorbent hydrogel at three levels (0, 150 and 300 kg/ha) as the sub-factor. Results revealed that there was a positive and significant correlation (r = 0.97**) between chlorophyll content and leaf nitrogen percentage. Also, significant correlation was observed between these traits and forage fresh and dry weight of forage, protein yield and raw fiber percentage of the forage. As drought stress increased, the measured traits showed a descending trend. The superabsorbent polymer increased the fresh and dry weight of forage, growth indices and qualitative traits of pearl millet. Mean fresh weight of forage, chlorophyll content, protein content and percentage of fiber showed no significant difference between 100% and 80% irrigation levels. Superabsorbent application led to 20% water saving. Therefore, it can be said that superabsorbent hydrogel application under drought stress will improve yield, qualitative traits and growth indices of pearl millet through increasing soil water holding capacity, reducing nutrient leaching, fast and optimal growth of roots and better soil aeration.
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Claims 10
Claim · model-written summary
Chlorophyll content was positively and significantly correlated with leaf nitrogen percentage (r = 0.97).
- Taxon
- Pennisetum glaucum
Cenchrus americanust0 - Compound
- chlorophylle0
- Outcome
- leaf nitrogen percentagee0
- Direction
- positivee0
- Value
- r = 0.97e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Forage Millet (Pennisetum glaucum L.)”
e0“there was a positive and significant correlation (r = 0.97**) between chlorophyll content and leaf nitrogen percentage”
Claim · model-written summary
Chlorophyll-related traits were significantly correlated with forage fresh and dry weight and protein yield.
- Taxon
- Pennisetum glaucumCenchrus americanust0
- Compound
- chlorophylle0
- Outcome
- forage fresh and dry weight of forage, protein yielde1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Forage Millet (Pennisetum glaucum L.)”
e0“there was a positive and significant correlation (r = 0.97**) between chlorophyll content and leaf nitrogen percentage”
e1“significant correlation was observed between these traits and forage fresh and dry weight of forage, protein yield and raw fiber percentage of the forage”
Claim · model-written summary
Chlorophyll-related traits were significantly correlated with raw fiber percentage of the forage.
- Taxon
- Pennisetum glaucumCenchrus americanust0
- Compound
- chlorophylle0
- Outcome
- raw fiber percentagee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Forage Millet (Pennisetum glaucum L.)”
e0“there was a positive and significant correlation (r = 0.97**) between chlorophyll content and leaf nitrogen percentage”
e1“significant correlation was observed between these traits and forage fresh and dry weight of forage, protein yield and raw fiber percentage of the forage”
Claim · model-written summary
Measured traits decreased as drought stress increased.
- Taxon
- Pennisetum glaucumCenchrus americanust0
- Treatment
- drought stresse2
- Outcome
- measured traitse2
- Direction
- descendinge2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Forage Millet (Pennisetum glaucum L.)”
e2“As drought stress increased, the measured traits showed a descending trend”
Claim · model-written summary
Superabsorbent polymer increased forage fresh and dry weight and growth indices of pearl millet.
- Taxon
- Pennisetum glaucumCenchrus americanust0
- Treatment
- superabsorbent polymere3
- Outcome
- fresh and dry weight of forage, growth indicese3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Forage Millet (Pennisetum glaucum L.)”
e3“The superabsorbent polymer increased the fresh and dry weight of forage, growth indices and qualitative traits of pearl millet”
Claim · model-written summary
Superabsorbent polymer increased qualitative traits of pearl millet.
- Taxon
- Pennisetum glaucumCenchrus americanust0
- Treatment
- superabsorbent polymere3
- Outcome
- qualitative traitse3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Forage Millet (Pennisetum glaucum L.)”
e3“The superabsorbent polymer increased the fresh and dry weight of forage, growth indices and qualitative traits of pearl millet”
Claim · model-written summary
Fresh weight of forage, chlorophyll content and protein content did not differ significantly between 80% and 100% irrigation.
- Taxon
- Pennisetum glaucumCenchrus americanust0
- Treatment
- 80% irrigation levelse4
- Outcome
- Mean fresh weight of forage, chlorophyll content, protein contente4
- Direction
- no significant differencee4
- Comparator
- 100%e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Forage Millet (Pennisetum glaucum L.)”
e4“Mean fresh weight of forage, chlorophyll content, protein content and percentage of fiber showed no significant difference between 100% and 80% irrigation levels”
Claim · model-written summary
Percentage of fiber did not differ significantly between 80% and 100% irrigation.
- Taxon
- Pennisetum glaucumCenchrus americanust0
- Treatment
- 80% irrigation levelse4
- Outcome
- percentage of fibere4
- Direction
- no significant differencee4
- Comparator
- 100%e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Forage Millet (Pennisetum glaucum L.)”
e4“Mean fresh weight of forage, chlorophyll content, protein content and percentage of fiber showed no significant difference between 100% and 80% irrigation levels”
Claim · model-written summary
Superabsorbent application saved 20% water.
- Taxon
- Pennisetum glaucumCenchrus americanust0
- Treatment
- Superabsorbent applicatione5
- Outcome
- water savinge5
- Value
- 20%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Forage Millet (Pennisetum glaucum L.)”
e5“Superabsorbent application led to 20% water saving”
Claim · model-written summary
Superabsorbent hydrogel under drought stress is expected to improve yield, qualitative traits and growth indices of pearl millet through soil water and root mechanisms.
- Taxon
- Pennisetum glaucumCenchrus americanust0
- Treatment
- superabsorbent hydrogel application under drought stresse6
- Outcome
- yield, qualitative traits and growth indicese6
- Qualifier
- through increasing soil water holding capacity, reducing nutrient leaching, fast and optimal growth of roots and better soil aeratione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Forage Millet (Pennisetum glaucum L.)”
e6“superabsorbent hydrogel application under drought stress will improve yield, qualitative traits and growth indices of pearl millet through increasing soil water holding capacity, reducing nutrient leaching, fast and optimal growth of roots and better soil aeration”
The same questions in other papers
irrigation · quality: grain · Cenchrus americanus (pearl millet)Positive and negative results
2 papers in the same direction as this paper · 2 reporting no difference from an alternative
- positive
- positive
- negative
1 paper more in this group
See all 5 papers →irrigation · physiology: pigments · Cenchrus americanus (pearl millet)Results agree
2 papers in the same direction as this paper
- no effect
- no effect
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.