Abstract
Two field experiments were carried out at Gemmeiza Agric. Res. Station, El – Gharbia Governorate during 2010 and 2011 seasons, to study the effect of four NPK fertilizers rates (100 %, 75 %, 50 % and 25 % of recommended rate) and application methods of humic acid on growth of the Egyptian cotton cultivar "Giza 86". The recommended rate of NPK was 45 kg N +22.50 kg P2O5 + 24.0 kg K2O/ fed.. The solutions of humic acid were applied with the concentration of 5 cm3/litre as a soaking seed for 18 h, 50 cm3/litre as soil application twice , 5 cm3/L as a foliar application at 40, 55 and 70 days from sowing and without humic acid as a control treatment. Leaf area index (LAI), total dry weight/plant, crop growth rate (CGR), plant height and number of fruiting branches/plant were significantly increased by increasing NPK rate from 25 up to 100% of the recommended rate at all sampling dates in both seasons. Also, application of 100% NPK recorded the highest net assimilation rate (NAR) at the first period (79-100 days) in the two seasons. Application of humic acid solution resulted in a significant increase in all mention growth measurements (except NAR) compared with control treatment in both seasons. Foliar application of humic acid resulted in a significant increase in leaf area index, total dry weight/plant, crop growth rate, plant height and number of fruiting branches/plant compared with other application methods in both seasons. The interaction between NPK rate and humic acid application had a significant effect on LAI, total dry weight/plant, CGR and NAR at the most sampling dates in the two seasons. Plants received 100 or 75% NPK along with foliar application of humic acid produced higher LAI, total dry weight/plant and CGR than those received 25 % NPK and without humic acid at the most sampling dates in both seasons. The relative ranking of the interaction between NPK rate and humic acid application for NAR was inconsistent at the two period in both seasons. None of the interaction had a significant effect on plant height and number of fruiting branches / plant in the two seasons. It can be concluded that 75% NPK and foliar application with humic acid could be recommended for optimum dry matter production of the Egyptian cotton cultivar "Giza 86". This result indicated that foliar application of humic acid can be saved 25% NPK fertilizer without reduce growth of cotton plant.
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Claims 12
Claim · model-written summary
Increasing NPK rate significantly increased Leaf area index (LAI), total dry weight/plant, crop growth rate (CGR).
- Taxon
- EGYPTIAN COTTON
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Gossypium barbadenset0 - Treatment
- increasing NPK rate from 25 up to 100% of the recommended ratee0
- Outcome
- Leaf area index (LAI), total dry weight/plant, crop growth rate (CGR)e0
- Direction
- increasede0
- Setting
- both seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Leaf area index (LAI), total dry weight/plant, crop growth rate (CGR), plant height and number of fruiting branches/plant were significantly increased by increasing NPK rate from 25 up to 100% of the recommended rate at all sampling dates in both seasons.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Increasing NPK rate significantly increased plant height and number of fruiting branches/plant.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- increasing NPK rate from 25 up to 100% of the recommended ratee0
- Outcome
- plant height and number of fruiting branches/plante0
- Direction
- increasede0
- Setting
- both seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf area index (LAI), total dry weight/plant, crop growth rate (CGR), plant height and number of fruiting branches/plant were significantly increased by increasing NPK rate from 25 up to 100% of the recommended rate at all sampling dates in both seasons.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
100% NPK gave the highest net assimilation rate during days 79–100.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- 100% NPKe0
- Outcome
- net assimilation rate (NAR)e0
- Direction
- higheste0
- Qualifier
- first period (79-100 days)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of 100% NPK recorded the highest net assimilation rate (NAR) at the first period (79-100 days) in the two seasons”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Humic acid increased growth measurements other than NAR compared with control.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- Application of humic acid solutione0
- Outcome
- growth measurements (except NAR)e0
- Direction
- increasee0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of humic acid solution resulted in a significant increase in all mention growth measurements (except NAR) compared with control treatment in both seasons.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Foliar humic acid significantly increased leaf area index, total dry weight/plant, crop growth rate compared with other application methods.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- Foliar application of humic acide0
- Outcome
- leaf area index, total dry weight/plant, crop growth ratee0
- Direction
- increasee0
- Comparator
- other application methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of humic acid resulted in a significant increase in leaf area index, total dry weight/plant, crop growth rate, plant height and number of fruiting branches/plant compared with other application methods in both seasons.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Foliar humic acid significantly increased plant height and number of fruiting branches/plant compared with other application methods.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- Foliar application of humic acide0
- Outcome
- plant height and number of fruiting branches/plante0
- Direction
- increasee0
- Comparator
- other application methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of humic acid resulted in a significant increase in leaf area index, total dry weight/plant, crop growth rate, plant height and number of fruiting branches/plant compared with other application methods in both seasons.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
The NPK–humic acid interaction significantly affected LAI, dry weight, CGR and NAR.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- interaction between NPK rate and humic acid applicatione0
- Outcome
- LAI, total dry weight/plant, CGR and NARe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction between NPK rate and humic acid application had a significant effect on LAI, total dry weight/plant, CGR and NAR at the most sampling dates in the two seasons.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
100 or 75% NPK with foliar humic acid gave higher LAI, dry weight and CGR than 25% NPK without humic acid.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- 100 or 75% NPK along with foliar application of humic acide0
- Outcome
- LAI, total dry weight/plant and CGRe0
- Direction
- highere0
- Comparator
- 25 % NPK and without humic acide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants received 100 or 75% NPK along with foliar application of humic acid produced higher LAI, total dry weight/plant and CGR than those received 25 % NPK and without humic acid at the most sampling dates in both seasons.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
NAR rankings for the NPK–humic acid interaction varied across periods.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Outcome
- relative ranking of the interaction between NPK rate and humic acid application for NARe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative ranking of the interaction between NPK rate and humic acid application for NAR was inconsistent at the two period in both seasons.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
The interaction did not significantly affect plant height or fruiting branch number.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- interactione0
- Outcome
- plant height and number of fruiting branches / plante0
- Direction
- Nonee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“None of the interaction had a significant effect on plant height and number of fruiting branches / plant in the two seasons.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
The authors recommend 75% NPK with foliar humic acid for optimum dry matter production.
- Taxon
- Egyptian cottonGossypium barbadensee0
- Material
- Giza 86e0
- Outcome
- 75% NPK and foliar application with humic acide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“75% NPK and foliar application with humic acid could be recommended for optimum dry matter production of the Egyptian cotton cultivar "Giza 86"”
Claim · model-written summary
Foliar humic acid may save 25% NPK fertilizer without reducing cotton growth.
- Taxon
- cotton
Gossypium hirsutume0 - Outcome
- saved 25% NPK fertilizer without reduce growthe0
- Value
- 25%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application of humic acid can be saved 25% NPK fertilizer without reduce growth of cotton plant”
The same questions in other papers
application · growth · Gossypium barbadense (Egyptian cotton)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
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See all 7 papers →fertilization · growth · Gossypium barbadense (Egyptian cotton)Results agree
4 papers in the same direction as this paper
- positive
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See all 5 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.