Abstract
TWO FIELD experiments were conducted at Giza Agriculture Research Station during the two growing seasons of 2015 and 2016. The investigation was carried out to study the effect of different irrigation intervals, i.e., two weeks and three weeks in combination with different sowing dates, i.e., 1st April ,15th April , 1st May and 15th May on Guar forage crop (Cyamopsis tetragonoloba L.,var. Shandaweel 1 ) crop - water relations, yield and yield components under middle Egypt conditions. The main results could be summarized as follows:-The number of applied irrigations and seasonal water consumptive use (CU) were increased with decreasing irrigation interval days which the shortage irrigation interval (irrigation every 15 days) recorded the maximum CU under all sowing date with an overall average being 442 and 453 mm for first and second season, respectively. The same trend was found with sowing date, with plant sown in 1st April consumed more water than the other sowing dates. The lowest water use efficiency (WUE) was recorded under longer irrigation interval (irrigation every 21days) comparable to (irrigation every 15 days) and values of WUE differed due to sowing date, which the S4 (sowing at 15th May) gave the lowest WUE while, S1( sowing at 1st April) obtained the highest value. The crop coefficient (Kc) values started small and increased to reach their maximum values in mid season under all sowing dates, then decline again until the crop maturity under all sowing dates.All yield and yield component traits were markedly affected by sowing date and irrigation interval. Most of the studied traits except leaves/stem ratio as well as fiber %, decreased by delaying sowing date from 1st April to 15th May. Decreasing irrigation interval days from 21 to 15 days significantly increased plant height, number of branches/plant, fresh and dry yield ton fad-1, while leaves/stem ratio and crud fiber% which increased by increasing irrigation intervals from 15 to 21 days.
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Claims 9
Claim · model-written summary
Shorter irrigation intervals increased the number of irrigations.
- Taxon
- Guar Forage Cropt0
- Treatment
- decreasing irrigation interval dayse0
- Outcome
- number of applied irrigationse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“The number of applied irrigations and seasonal water consumptive use (CU) were increased with decreasing irrigation interval days”
t0“Guar Forage Crop”
Claim · model-written summary
Shorter irrigation intervals increased seasonal water consumption, reaching 442 and 453 mm in the first and second seasons with irrigation every 15 days.
- Taxon
- Guar Forage Cropt0
- Treatment
- irrigation every 15 dayse0
- Outcome
- seasonal water consumptive use (CU)e0
- Direction
- maximume0
- Value
- 442 and 453 mme0
Not reportedComparator
Verbatim
e0“seasonal water consumptive use (CU) were increased with decreasing irrigation interval days which the shortage irrigation interval (irrigation every 15 days) recorded the maximum CU under all sowing date with an overall average being 442 and 453 mm for first and second season, respectively”
t0“Guar Forage Crop”
Claim · model-written summary
Guar sown on 1 April consumed more water than plants sown at other dates.
Verbatim
e0“plant sown in 1st April consumed more water than the other sowing dates”
t0“Guar Forage Crop”
Claim · model-written summary
Irrigation every 21 days gave lower water use efficiency than irrigation every 15 days.
Verbatim
e0“The lowest water use efficiency (WUE) was recorded under longer irrigation interval (irrigation every 21days) comparable to (irrigation every 15 days)”
t0“Guar Forage Crop”
Claim · model-written summary
Sowing on 15 May gave the lowest water use efficiency, whereas sowing on 1 April gave the highest.
Verbatim
e0“S4 (sowing at 15th May) gave the lowest WUE while, S1( sowing at 1st April) obtained the highest value”
t0“Guar Forage Crop”
Claim · model-written summary
The crop coefficient rose to a midseason maximum then declined toward maturity across sowing dates.
Verbatim
e0“The crop coefficient (Kc) values started small and increased to reach their maximum values in mid season under all sowing dates, then decline again until the crop maturity under all sowing dates”
t0“Guar Forage Crop”
Claim · model-written summary
Most studied traits decreased when sowing was delayed from 1 April to 15 May, apart from leaves to stem ratio and fiber percentage.
Verbatim
e0“Most of the studied traits except leaves/stem ratio as well as fiber %, decreased by delaying sowing date from 1st April to 15th May”
t0“Guar Forage Crop”
Claim · model-written summary
Irrigation every 15 rather than 21 days significantly increased plant height, branch number, and fresh and dry yield.
Verbatim
e0“Decreasing irrigation interval days from 21 to 15 days significantly increased plant height, number of branches/plant, fresh and dry yield ton fad-1”
t0“Guar Forage Crop”
Claim · model-written summary
Longer irrigation intervals increased leaves to stem ratio and crude fiber percentage.
Verbatim
e0“leaves/stem ratio and crud fiber% which increased by increasing irrigation intervals from 15 to 21 days”
t0“Guar Forage Crop”
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irrigation · physiology: water · Cyamopsis tetragonoloba (cluster bean)Positive and negative results
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