Abstract
A field experiment was carried out during the summer season of 2013 at the Experimental Farm, Faculty of Agriculture, Mansoura University to study the impact of spraying salicylic acid (SA) on mitigating the negative effect of drought conditions on maize hybrid plants (cross cv. Giza 10). The experiment was laid out in split plot design with three replications. In the present study, three levels (100, 75 and 50 % of water holding capacity) were arranged as main plots and two foliar applications of salicylic acid (zero "sprayed with tap water as control treatment" and 200 mg.L-1) as sub-plots. The results showed that growth parameters, plant height (cm), fresh and dry weight of flag leaf (g), yield components (cob length (cm), no of grains/cob, 100 grains weight (g), grain yield, straw yield, cob yield ton/fed), mineral content of leaves (N, P and K in flag leaf), seed quality characteristics (crude protein, oil content and total carbohydrates %) were significantly decreased with drought stressat 50% of water holding capacity. While, the effect of salicylic acid sprayed at rate of 200 mg.L-1 on the previously mentioned traits recorded positive impact of high water deficit as compared with the control treatment (zero mg L-1 SA) which gave the lowest parameters. N, P and K concentrations in tested soil were significantly response (P ≤ 0.05) to drought stress, foliar spraying of (SA) and their combinations. Reduced level of water application at 50% resulted in decreases in the concentration of available N, P and K in soil. The highest concentrations of available N, P and K in soil were recorded at 75% of water holding capacity combined with 200 mg.L-1 SA, while the lowest concentrations were recorded at 50% of water holding capacity in the absence of spraying with SA. It can be conclude that, foliar application of salicylic acid at rate of 200 mg.L-1 could be used as appropriate growth regulator for reducing the negative effects on maize plant under water deficiency conditions.
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Claims 10
Claim · model-written summary
At 50% water holding capacity drought significantly reduced maize growth traits.
- Treatment
- drought stressat 50% of water holding capacitye0
- Outcome
- plant height (cm), fresh and dry weight of flag leaf (g)e0
- Direction
- decreasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth parameters, plant height (cm), fresh and dry weight of flag leaf (g), yield components (cob length (cm), no of grains/cob, 100 grains weight (g), grain yield, straw yield, cob yield ton/fed), mineral content of leaves (N, P and K in flag leaf), seed quality characteristics (crude protein, oil content and total carbohydrates %) were significantly decreased with drought stressat 50% of water holding capacity”
t0“Maize (Zea mays) Plant”
Claim · model-written summary
Drought at 50% water holding capacity significantly reduced maize yield components and yields.
- Treatment
- drought stressat 50% of water holding capacitye0
- Outcome
- grain yield, straw yield, cob yield ton/fede0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield components (cob length (cm), no of grains/cob, 100 grains weight (g), grain yield, straw yield, cob yield ton/fed), mineral content of leaves (N, P and K in flag leaf), seed quality characteristics (crude protein, oil content and total carbohydrates %) were significantly decreased with drought stressat 50% of water holding capacity”
t0“Maize (Zea mays) Plant”
Claim · model-written summary
Drought at 50% water holding capacity significantly reduced leaf N, P and K.
- Treatment
- drought stressat 50% of water holding capacitye0
- Outcome
- N, P and K in flag leafe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mineral content of leaves (N, P and K in flag leaf), seed quality characteristics (crude protein, oil content and total carbohydrates %) were significantly decreased with drought stressat 50% of water holding capacity”
t0“Maize (Zea mays) Plant”
Claim · model-written summary
Drought at 50% water holding capacity significantly reduced seed protein, oil and carbohydrate traits.
- Treatment
- drought stressat 50% of water holding capacitye0
- Outcome
- crude protein, oil content and total carbohydrates %e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed quality characteristics (crude protein, oil content and total carbohydrates %) were significantly decreased with drought stressat 50% of water holding capacity”
t0“Maize (Zea mays) Plant”
Claim · model-written summary
Salicylic acid at 200 mg.L-1 improved the previously listed maize traits under severe deficit relative to the water-sprayed control.
- Treatment
- salicylic acid sprayed at rate of 200 mg.L-1e0
- Outcome
- previously mentioned traitse0
- Direction
- positive impacte0
- Comparator
- control treatment (zero mg L-1 SA)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of salicylic acid sprayed at rate of 200 mg.L-1 on the previously mentioned traits recorded positive impact of high water deficit as compared with the control treatment (zero mg L-1 SA) which gave the lowest parameters”
t0“Maize (Zea mays) Plant”
Claim · model-written summary
Drought, salicylic acid and their combination significantly affected soil N, P and K concentrations.
- Treatment
- drought stress, foliar spraying of (SA) and their combinationse0
- Outcome
- N, P and K concentrations in tested soile0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N, P and K concentrations in tested soil were significantly response (P ≤ 0.05) to drought stress, foliar spraying of (SA) and their combinations”
t0“Maize (Zea mays) Plant”
Claim · model-written summary
Water application at 50% reduced available soil N, P and K.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduced level of water application at 50% resulted in decreases in the concentration of available N, P and K in soil”
t0“Maize (Zea mays) Plant”
Claim · model-written summary
Soil N, P and K were highest at 75% water holding capacity with 200 mg.L-1 SA.
- Treatment
- 75% of water holding capacity combined with 200 mg.L-1 SAe0
- Outcome
- concentrations of available N, P and K in soile0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest concentrations of available N, P and K in soil were recorded at 75% of water holding capacity combined with 200 mg.L-1 SA”
t0“Maize (Zea mays) Plant”
Claim · model-written summary
Soil N, P and K were lowest at 50% water holding capacity without SA.
- Treatment
- 50% of water holding capacity in the absence of spraying with SAe0
- Outcome
- lowest concentrationse0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest concentrations were recorded at 50% of water holding capacity in the absence of spraying with SA”
t0“Maize (Zea mays) Plant”
Claim · model-written summary
The authors recommend foliar salicylic acid at 200 mg.L-1 to reduce drought effects on maize.
- Outcome
- foliar application of salicylic acid at rate of 200 mg.L-1 could be used as appropriate growth regulator for reducing the negative effects on maize plant under water deficiency conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application of salicylic acid at rate of 200 mg.L-1 could be used as appropriate growth regulator for reducing the negative effects on maize plant under water deficiency conditions”
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