Abstract
Two field trials were conducted in a highly calcareous sandy clay loam soil at Nubaria Agric. Res. Station, Agric. Res. Center, Alexandria governorate, Egypt during 2012 and 2013 seasons to study the effect of some sources of potassium fertilizer, soil and foliar potassium application treatments on growth, earliness, yield and its components of Egyptian long staple cotton cultivar Giza 86 (Gossypium barbadense, L.). Potassium fertilizer was added according to the experimental treatments (source, rate, method and date of application). Potassium sulphate (48% K2O) was applied at the rate of 24 and 2.4 kg K2O/fed., for the soil and foliar applications, respectively. Potassium humate fertilizer (20% humic acid and 8% K2O) was applied at the rate of 2 and 1 L/fed., for the soil and foliar applications, respectively. Potassein fertilizer (30% K2O and 10% P2O5) was applied at the rate of 2 and 1 L/fed., for the soil and foliar applications, respectively. The soil applications after thinning in the form of potassium source. The experimental design was a split plot with four replications. The main plots involved the three sources of potassium fertilizer namely; A- Potassium sulphates, B- Potassium humate and C- Potassein. The sub main plots involved the five treatments of potassium application namely; 1- Soil application at thinning, 2- Soil application + foliar spraying two times (at initiation of flowering and two weeks after flowering), 3- Soil application + foliar spraying three time (at squaring, initiation of flowering and two weeks after flowering), 4- Foliar spraying two times ( at initiation of flowering and two weeks after flowering) and 5- Foliar spraying three times (at squaring, initiation of flowering and two weeks after flowering). The most important results obtained could be summarized as follows: 1) The all sources of potassium had significant effects on all growth attributes in 2012 and 2013 seasons. 2) The potassium humate fertilizer significantly decreased No. of days from sowing to the first flower appearance as well as, to the first opening boll, boll age and consequently, increased earliness percentage. 3) The treatment of potassium humate produced the highest values for No. of opened bolls/plant, boll weight and seed cotton yield/plant and consequently, the highest seed cotton yield/fed., while, the sources of potassium fertilizer did not exhibit any significant effect on No. of plants/fed., at harvest in both seasons. 4) The application times had significant effects on all growth attributes. The soil application with foliar application sprayed three times at squaring, start and peak of flowering stages, significantly, decreased days from sowing to the first flower appearance as well as, to the first opening boll and boll age, and increased earliness % compared to the other potassium application treatments, and significantly increased No. of opened bolls/plant, boll weight, seed cotton yield/plant and consequently seed cotton yield/fed. in both seasons.
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Claims 9
Claim · model-written summary
Potassium sources significantly affected all growth attributes in both seasons.
- Taxon
- Egyptian Cotton
.jpg?width=60)
Gossypium barbadenset0 - Treatment
- sources of potassiume0
- Outcome
- growth attributese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Egyptian Cotton”
e0“The all sources of potassium had significant effects on all growth attributes in 2012 and 2013 seasons”
Claim · model-written summary
Potassium humate reduced days to first flower and first open boll and boll age.
- Taxon
- Egyptian CottonGossypium barbadenset0
- Treatment
- potassium humate fertilizere0
- Outcome
- No. of days from sowing to the first flower appearance as well as, to the first opening boll, boll agee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Egyptian Cotton”
e0“The potassium humate fertilizer significantly decreased No. of days from sowing to the first flower appearance as well as, to the first opening boll, boll age”
Claim · model-written summary
Potassium humate increased earliness percentage.
- Taxon
- Egyptian CottonGossypium barbadenset0
- Treatment
- potassium humatee1
- Outcome
- earliness percentagee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Egyptian Cotton”
e0“increased earliness percentage”
e1“potassium humate fertilizer”
Claim · model-written summary
Potassium humate produced the highest opened bolls per plant, boll weight, seed cotton yield per plant and per fed.
- Taxon
- Egyptian CottonGossypium barbadenset0
- Treatment
- potassium humatee0
- Outcome
- No. of opened bolls/plant, boll weight and seed cotton yield/plant and consequently, the highest seed cotton yield/fed.e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Egyptian Cotton”
e0“The treatment of potassium humate produced the highest values for No. of opened bolls/plant, boll weight and seed cotton yield/plant and consequently, the highest seed cotton yield/fed.”
Claim · model-written summary
Potassium source did not significantly affect plants per fed. at harvest in either season.
- Taxon
- Egyptian CottonGossypium barbadenset0
- Treatment
- sources of potassium fertilizere0
- Outcome
- No. of plants/fed.e0
- Direction
- did not exhibit any significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Egyptian Cotton”
e0“the sources of potassium fertilizer did not exhibit any significant effect on No. of plants/fed., at harvest in both seasons”
Claim · model-written summary
Application times significantly affected all growth attributes.
- Taxon
- Egyptian CottonGossypium barbadenset0
- Treatment
- application timese0
- Outcome
- growth attributese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Egyptian Cotton”
e0“The application times had significant effects on all growth attributes”
Claim · model-written summary
Soil plus three foliar applications reduced days to first flower and first open boll and boll age compared with other schedules.
- Taxon
- Egyptian CottonGossypium barbadenset0
- Treatment
- soil application with foliar application sprayed three times at squaring, start and peak of flowering stagese0
- Outcome
- days from sowing to the first flower appearance as well as, to the first opening boll and boll agee0
- Direction
- decreasede0
- Comparator
- other potassium application treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Egyptian Cotton”
e0“The soil application with foliar application sprayed three times at squaring, start and peak of flowering stages, significantly, decreased days from sowing to the first flower appearance as well as, to the first opening boll and boll age, and increased earliness % compared to the other potassium application treatments”
Claim · model-written summary
Soil plus three foliar applications increased earliness compared with other schedules.
- Taxon
- Egyptian CottonGossypium barbadenset0
- Treatment
- soil application with foliar application sprayed three times at squaring, start and peak of flowering stagese0
- Outcome
- earliness %e0
- Direction
- increasede0
- Comparator
- other potassium application treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Egyptian Cotton”
e0“The soil application with foliar application sprayed three times at squaring, start and peak of flowering stages, significantly, decreased days from sowing to the first flower appearance as well as, to the first opening boll and boll age, and increased earliness % compared to the other potassium application treatments”
Claim · model-written summary
Soil plus three foliar applications increased opened bolls, boll weight and seed cotton yield.
- Taxon
- Egyptian CottonGossypium barbadenset0
- Treatment
- soil application with foliar application sprayed three times at squaring, start and peak of flowering stagese0
- Outcome
- No. of opened bolls/plant, boll weight, seed cotton yield/plant and consequently seed cotton yield/fed.e0
- Direction
- increasede0
- Comparator
- other potassium application treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Egyptian Cotton”
e0“The soil application with foliar application sprayed three times at squaring, start and peak of flowering stages, significantly, decreased days from sowing to the first flower appearance as well as, to the first opening boll and boll age, and increased earliness % compared to the other potassium application treatments, and significantly increased No. of opened bolls/plant, boll weight, seed cotton yield/plant and consequently seed cotton yield/fed. in both seasons”
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See all 15 papers →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.