Abstract
Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008 to evaluate the effects of different rates of phosphorus (15, 30 and 45 kg P2O5/fed) either single and/or in combination with application methods of humic acid (control, foliar spray, transplant treatment and soil application) on plant growth, yield and its components, as well as chemical constituents and storability of tuber roots. In general, results showed that the increasing of applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fed significantly increased main stem length, canopy dry weight plant leaf area, total chlorophyll and carotenoides as well as total and marketable yield, dry matter percentage of tuber root and tuber root weight and diameter, Moreover, Application phosphorus at 45 kg P2O5/fed significantly increased N, P, K, carbohydrate and total sugars in tuber roots. This P-rate had the most interesting observation was the enhancing of storability and reduced decay percentage. On the other hand, application methods of humic acid had a significant effect on all studied characters in both seasons. Soil application method of humic acid had a significant increases in plant growth characters, photosynthetic pigments, total and marketable yield and tuber root quality. Besides, this application method significantly increased chemical composition of tuber roots and reduced the weight loss and decay percentages. The combined treatments of P-rates and application method of humic acid were generally more effective on the most studied parameters than with single ones. The best results were obtained by application 30 kg P2O5/fed with soil application method of humic acid. This treatment achieved increases in vegetative growth characters, total and marketable yield, average of tuber root weight and diameter as well as concentrations of N, P, K, carbohydrate and total sugars in tuber roots. In addition, this combined treatment enhanced the tuberous roots storability and reduced decay% comparing with the other ones. Therefore, this treatment could be recommended for raising sweet potato yield and improving tuberous roots quality as well as reduced the need for chemical P-fertilizer by about 33.3 %, thereby reducing costs and environment pollution under similar conditions to this work.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 16
Claim · model-written summary
Increasing phosphorus from 15 to 45 kg P2O5/fed increased main stem length, canopy dry weight and leaf area of sweet potato.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatase0 - Material
- Beaure Garde0
- Treatment
- applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fede1
- Outcome
- main stem length, canopy dry weight plant leaf areae1
- Direction
- increasede1
- Comparator
- 15 kg P2O5e1
- Setting
- Horticulture Research Farm of El-Bramoon, El-Dakahlia Governoratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e1“the increasing of applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fed significantly increased main stem length, canopy dry weight plant leaf area, total chlorophyll and carotenoides as well as total and marketable yield, dry matter percentage of tuber root and tuber root weight and diameter”
Claim · model-written summary
Increasing phosphorus from 15 to 45 kg P2O5/fed increased total chlorophyll and carotenoids of sweet potato.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fede1
- Outcome
- total chlorophyll and carotenoidese1
- Direction
- increasede1
- Comparator
- 15 kg P2O5e1
- Setting
- Horticulture Research Farm of El-Bramoon, El-Dakahlia Governoratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e1“the increasing of applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fed significantly increased main stem length, canopy dry weight plant leaf area, total chlorophyll and carotenoides as well as total and marketable yield, dry matter percentage of tuber root and tuber root weight and diameter”
Claim · model-written summary
Increasing phosphorus from 15 to 45 kg P2O5/fed increased total and marketable yield of sweet potato.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fede1
- Outcome
- total and marketable yielde1
- Direction
- increasede1
- Comparator
- 15 kg P2O5e1
- Setting
- Horticulture Research Farm of El-Bramoon, El-Dakahlia Governoratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e1“the increasing of applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fed significantly increased main stem length, canopy dry weight plant leaf area, total chlorophyll and carotenoides as well as total and marketable yield, dry matter percentage of tuber root and tuber root weight and diameter”
Claim · model-written summary
Increasing phosphorus from 15 to 45 kg P2O5/fed increased dry matter percentage, tuber root weight and tuber root diameter of sweet potato.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fede1
- Outcome
- dry matter percentage of tuber root and tuber root weight and diametere1
- Direction
- increasede1
- Comparator
- 15 kg P2O5e1
- Setting
- Horticulture Research Farm of El-Bramoon, El-Dakahlia Governoratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e1“the increasing of applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fed significantly increased main stem length, canopy dry weight plant leaf area, total chlorophyll and carotenoides as well as total and marketable yield, dry matter percentage of tuber root and tuber root weight and diameter”
Claim · model-written summary
Phosphorus at 45 kg P2O5/fed increased N, P and K in sweet potato tuber roots.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Organ / stage
- tuber rootse2
- Treatment
- Application phosphorus at 45 kg P2O5/fede2
- Outcome
- N, P, Ke2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e2“Application phosphorus at 45 kg P2O5/fed significantly increased N, P, K, carbohydrate and total sugars in tuber roots”
Claim · model-written summary
Phosphorus at 45 kg P2O5/fed increased carbohydrate and total sugars in sweet potato tuber roots.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Organ / stage
- tuber rootse2
- Treatment
- Application phosphorus at 45 kg P2O5/fede2
- Outcome
- carbohydrate and total sugarse2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e2“Application phosphorus at 45 kg P2O5/fed significantly increased N, P, K, carbohydrate and total sugars in tuber roots”
Claim · model-written summary
The 45 kg P2O5/fed phosphorus rate enhanced storability of sweet potato tubers.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fede1
- Outcome
- storabilitye3
- Direction
- enhancinge3
- Comparator
- 15 kg P2O5e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e1“the increasing of applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fed significantly increased main stem length, canopy dry weight plant leaf area, total chlorophyll and carotenoides as well as total and marketable yield, dry matter percentage of tuber root and tuber root weight and diameter”
e3“This P-rate had the most interesting observation was the enhancing of storability and reduced decay percentage”
Claim · model-written summary
The 45 kg P2O5/fed phosphorus rate reduced decay percentage of sweet potato tubers.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fede1
- Outcome
- decay percentagee3
- Direction
- reducede3
- Comparator
- 15 kg P2O5e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e1“the increasing of applied phosphorus rate from 15 kg P2O5 up to 45 kg P2O5/fed significantly increased main stem length, canopy dry weight plant leaf area, total chlorophyll and carotenoides as well as total and marketable yield, dry matter percentage of tuber root and tuber root weight and diameter”
e3“This P-rate had the most interesting observation was the enhancing of storability and reduced decay percentage”
Claim · model-written summary
Soil application of humic acid increased plant growth characters, photosynthetic pigments, total and marketable yield of sweet potato compared with the control.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- Soil application method of humic acide4
- Outcome
- plant growth characters, photosynthetic pigments, total and marketable yielde4
- Direction
- increasese4
- Comparator
- controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e4“Soil application method of humic acid had a significant increases in plant growth characters, photosynthetic pigments, total and marketable yield and tuber root quality”
e6“application methods of humic acid (control, foliar spray, transplant treatment and soil application)”
Claim · model-written summary
Soil application of humic acid increased tuber root quality of sweet potato compared with the control.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- Soil application method of humic acide4
- Outcome
- tuber root qualitye4
- Direction
- increasese4
- Comparator
- controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e4“Soil application method of humic acid had a significant increases in plant growth characters, photosynthetic pigments, total and marketable yield and tuber root quality”
e6“application methods of humic acid (control, foliar spray, transplant treatment and soil application)”
Claim · model-written summary
Soil application of humic acid significantly increased chemical composition of sweet potato tuber roots.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- this application methode5
- Outcome
- chemical composition of tuber rootse5
- Direction
- increasede5
- Comparator
- controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e5“Besides, this application method significantly increased chemical composition of tuber roots and reduced the weight loss and decay percentages”
e6“application methods of humic acid (control, foliar spray, transplant treatment and soil application)”
Claim · model-written summary
Soil application of humic acid reduced weight loss and decay percentages of stored sweet potato tubers.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- this application methode5
- Outcome
- weight loss and decay percentagese5
- Direction
- reducede5
- Comparator
- controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e5“Besides, this application method significantly increased chemical composition of tuber roots and reduced the weight loss and decay percentages”
e6“application methods of humic acid (control, foliar spray, transplant treatment and soil application)”
Claim · model-written summary
The combined P-rate and humic acid application were more effective on most studied parameters of sweet potato than single treatments.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- combined treatments of P-rates and application method of humic acide6
- Outcome
- the most studied parameterse6
- Direction
- more effectivee6
- Comparator
- single onese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e6“The combined treatments of P-rates and application method of humic acid were generally more effective on the most studied parameters than with single ones”
Claim · model-written summary
The best results for sweet potato were obtained with 30 kg P2O5/fed and soil application of humic acid.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Beaure Garde0
- Treatment
- 30 kg P2O5/fed with soil application method of humic acide7
- Outcome
- best resultse7
- Direction
- beste7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e7“The best results were obtained by application 30 kg P2O5/fed with soil application method of humic acid”
Claim · model-written summary
The authors recommend the combination of 30 kg P2O5/fed with soil-applied humic acid for raising sweet potato yield and improving tuber root quality.
- Taxon
- sweet potatoIpomoea batatase0
- Outcome
- raising sweet potato yield and improving tuberous roots qualitye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e6“Therefore, this treatment could be recommended for raising sweet potato yield and improving tuberous roots quality”
Claim · model-written summary
The 30 kg P2O5/fed with soil-applied humic acid treatment reduced the need for chemical P-fertilizer by about 33.3%.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- 30 kg P2O5/fed with soil application method of humic acide7
- Outcome
- need for chemical P-fertilizere6
- Direction
- reducede6
- Value
- 33.3 %e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two field experiments were conducted on sweet potato (Ipomoea batatas L.) cv. Beaure Gard at the Horticulture Research Farm of El-Bramoon, El-Dakahlia Governorate, during the two successive summer seasons of 2007 and 2008”
e7“The best results were obtained by application 30 kg P2O5/fed with soil application method of humic acid”
e6“as well as reduced the need for chemical P-fertilizer by about 33.3 %”
The same questions in other papers
phosphorus · physiology: pigments · Ipomoea batatas (sweet potato)Positive and negative results
1 in the opposite direction
- no effect
phosphorus · quality: sugar starch · Ipomoea batatas (sweet potato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
phosphorus · quality: postharvest · Ipomoea batatas (sweet potato)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →phosphorus · growth · Ipomoea batatas (sweet potato)Positive and negative results
2 papers in the same direction as this paper · 6 in the opposite direction
- positive
- negative
- negative
5 papers more in this group
See all 9 papers →application · physiology: photosynthesis · Ipomoea batatas (sweet potato)Results agree
1 paper in the same direction as this paper
- positive
phosphorus · disease · Ipomoea batatas (sweet potato)Results agree
2 papers in the same direction as this paper
- positive
- positive
application · quality: general · Ipomoea batatas (sweet potato)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
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.