Abstract
The present investigation was carried out at Sakha Agricultural Research Station during 2002 and 2003 seasons of the Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.). The aim of this investigation was to study the effect of water stress and potassium fertilization levels on growth, earliness and seed cotton yield as well as its components. A split plot design with four replication was used. The main plots was assigned to water stress treatments (irrigation intervals) i.e. irrigation every two weeks, every three weeks and every four weeks. Three potassium levels i.e. 0, 24 and 48 K2O/feddan was assigned in the sub plots. The nitrogen fertilizer was 60 kg/fed. for all treatments. The results of this experiments indicated that irrigation interval every two weeks increased final plant height, number of the internodes main stem, both sympodial and monopodial branches, total dry weight number of open and unopen bolls, boll weight, lint % and seed cotton yield per both plant and feddan, while it decreased main stem internode length. Number of days from sowing date to the first flower appearance and the first boll craking were significantly decreased as the irrigation intervals increased. Earliness percentage was significantly increased by increasing irrigation intervals while position of the first sympodium was not affected by irrigation intervals. Leaf area was significantly increased as irrigation intervals decreased up to two weeks. With respect to potassium levels the results indicated that plant height, number of internodes per plant, internode length, numbers of monopodia/branch per plant, lint percentage and seed index were insignificantly affected by K rates in the two seasons. On the other hand, number of sympodium per plant, total dry weight per plant, leaf area, numbers of open and unopen boll per plant, boll weight, seed cotton yield per plant and per feddan were significantly increased by increasing potassium fertilizer rates from 24 up to 48 kg K2O/fed. The interaction between irrigation intervals and potassium fertilizer levels had significant effect on total dry weight, number of open bolls/plant, boll weight, seed cotton yield per plant and seed cotton yield per feddan only in 2002 season. The greatest values of these traits were obtained from the irrigation every two weeks and potassium fertilization at 48 kg K2O/fed. Seasonal consumptive use incubic meters per feddan and water use efficiency were decreased by expanding the irrigation intervals. On the other hand, consumptive use of water was decreased by increasing potassium fertilizer levels while use of efficiency was increased in the two seasons.
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Claims 19
Claim · model-written summary
Irrigation every two weeks increased final plant height, number of main-stem internodes and sympodial and monopodial branches in cotton.
- Taxon
- Gossypium barbadense L.
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Gossypium barbadensee0 - Material
- Giza 88e0
- Treatment
- irrigation interval every two weekse1
- Outcome
- final plant height, number of the internodes main stem, both sympodial and monopodial branchese2
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“irrigation interval every two weeks increased”
e2“final plant height, number of the internodes main stem, both sympodial and monopodial branches”
Claim · model-written summary
Irrigation every two weeks increased total dry weight, number of open and unopen bolls and boll weight in cotton.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- irrigation interval every two weekse1
- Outcome
- total dry weight number of open and unopen bolls, boll weighte2
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“irrigation interval every two weeks increased”
e2“total dry weight number of open and unopen bolls, boll weight”
Claim · model-written summary
Irrigation every two weeks increased lint percentage and seed cotton yield per plant and per feddan.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- irrigation interval every two weekse1
- Outcome
- lint % and seed cotton yield per both plant and feddane2
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“irrigation interval every two weeks increased”
e2“lint % and seed cotton yield per both plant and feddan”
Claim · model-written summary
Irrigation every two weeks decreased main-stem internode length in cotton.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- irrigation interval every two weekse1
- Outcome
- main stem internode lengthe2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“irrigation interval every two weeks”
e2“it decreased main stem internode length”
Claim · model-written summary
Days from sowing to first flower and to first boll cracking were significantly decreased as irrigation intervals increased.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- irrigation intervals increasede1
- Outcome
- Number of days from sowing date to the first flower appearance and the first boll crakinge1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“Number of days from sowing date to the first flower appearance and the first boll craking were significantly decreased as the irrigation intervals increased”
Claim · model-written summary
Earliness percentage was significantly increased by increasing irrigation intervals.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- increasing irrigation intervalse1
- Outcome
- Earliness percentagee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“Earliness percentage was significantly increased by increasing irrigation intervals”
Claim · model-written summary
Position of the first sympodium was not affected by irrigation intervals.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- irrigation intervalse1
- Outcome
- position of the first sympodiume1
- Direction
- not affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“position of the first sympodium was not affected by irrigation intervals”
Claim · model-written summary
Leaf area was significantly increased as irrigation intervals decreased up to two weeks.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- irrigation intervals decreased up to two weekse1
- Outcome
- Leaf areae1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“Leaf area was significantly increased as irrigation intervals decreased up to two weeks”
Claim · model-written summary
Plant height, number of internodes per plant and internode length were insignificantly affected by potassium rates in the two seasons.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- K ratese1
- Outcome
- plant height, number of internodes per plant, internode lengthe2
- Direction
- insignificantly affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“insignificantly affected by K rates in the two seasons”
e2“plant height, number of internodes per plant, internode length”
Claim · model-written summary
Numbers of monopodia per plant, lint percentage and seed index were insignificantly affected by potassium rates.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- K ratese1
- Outcome
- numbers of monopodia/branch per plant, lint percentage and seed indexe1
- Direction
- insignificantly affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“numbers of monopodia/branch per plant, lint percentage and seed index were insignificantly affected by K rates”
Claim · model-written summary
Number of sympodia per plant, total dry weight per plant and leaf area were significantly increased by raising potassium from 24 to 48 kg K2O/fed.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- increasing potassium fertilizer rates from 24 up to 48 kg K2O/fede1
- Outcome
- number of sympodium per plant, total dry weight per plant, leaf areae2
- Direction
- increasede1
- Comparator
- 24e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“significantly increased by increasing potassium fertilizer rates from 24 up to 48 kg K2O/fed”
e2“number of sympodium per plant, total dry weight per plant, leaf area”
Claim · model-written summary
Numbers of open and unopen bolls per plant and boll weight were significantly increased by raising potassium from 24 to 48 kg K2O/fed.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- increasing potassium fertilizer rates from 24 up to 48 kg K2O/fede1
- Outcome
- numbers of open and unopen boll per plant, boll weighte2
- Direction
- increasede1
- Comparator
- 24e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“significantly increased by increasing potassium fertilizer rates from 24 up to 48 kg K2O/fed”
e2“numbers of open and unopen boll per plant, boll weight”
Claim · model-written summary
Seed cotton yield per plant and per feddan were significantly increased by raising potassium from 24 to 48 kg K2O/fed.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- increasing potassium fertilizer rates from 24 up to 48 kg K2O/fede1
- Outcome
- seed cotton yield per plant and per feddane2
- Direction
- increasede1
- Comparator
- 24e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“significantly increased by increasing potassium fertilizer rates from 24 up to 48 kg K2O/fed”
e2“seed cotton yield per plant and per feddan”
Claim · model-written summary
The interaction of irrigation intervals and potassium levels significantly affected total dry weight, number of open bolls per plant and boll weight, only in 2002.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- interaction between irrigation intervals and potassium fertilizer levelse1
- Outcome
- total dry weight, number of open bolls/plant, boll weighte1
Not reportedComparatorDirectionQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“The interaction between irrigation intervals and potassium fertilizer levels had significant effect on total dry weight, number of open bolls/plant, boll weight”
Claim · model-written summary
The interaction of irrigation intervals and potassium levels significantly affected seed cotton yield per plant and per feddan, only in the 2002 season.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- interaction between irrigation intervals and potassium fertilizer levelse1
- Outcome
- seed cotton yield per plant and seed cotton yield per feddane2
- Qualifier
- only in 2002 seasone2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“The interaction between irrigation intervals and potassium fertilizer levels”
e2“seed cotton yield per plant and seed cotton yield per feddan only in 2002 season”
Claim · model-written summary
The greatest values of these traits came from irrigation every two weeks with potassium at 48 kg K2O/fed.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- irrigation every two weeks and potassium fertilization at 48 kg K2O/fede1
- Outcome
- greatest values of these traitse1
- Direction
- greateste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“The greatest values of these traits were obtained from the irrigation every two weeks and potassium fertilization at 48 kg K2O/fed”
Claim · model-written summary
Seasonal consumptive use and water use efficiency were decreased by expanding the irrigation intervals.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- expanding the irrigation intervalse1
- Outcome
- Seasonal consumptive use incubic meters per feddan and water use efficiencye1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“Seasonal consumptive use incubic meters per feddan and water use efficiency were decreased by expanding the irrigation intervals”
Claim · model-written summary
Consumptive use of water was decreased by increasing potassium fertilizer levels.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- increasing potassium fertilizer levelse1
- Outcome
- consumptive use of watere1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“consumptive use of water was decreased by increasing potassium fertilizer levels”
Claim · model-written summary
Water use efficiency was increased by potassium fertilizer levels in the two seasons.
- Taxon
- Gossypium barbadense L.Gossypium barbadensee0
- Material
- Giza 88e0
- Treatment
- increasing potassium fertilizer levelse1
- Outcome
- use of efficiencye2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Egyptian cotton cultivar Giza 88 (Gossypium barbadense L.)”
e1“increasing potassium fertilizer levels”
e2“use of efficiency was increased in the two seasons”
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