Abstract
A four-year field trial was carried out to determine effect of nitrogen(N) and potassium(K) combined application on mulberry(Morus atropurpurea Roxb.) during 1999-2002 and a silk worm(Bombyx mori Linne) experiment was conducted to determine their consequential effect on silk cocoon yield and quality in summer of 2001. The results showed that N and K fertilization significantly increased mulberry leaf yield,but the effect of only N without K treatment was very limited and high rate K with low rate N hindered the improvement of leaf yield.In comparison with leaf yield in other treatments,high rate N and K treatment [N 450 and K2O 300 kg/(ha·a)] received the highest yield,which increased by 35.2% over N0K0 treatment.Essential amino acids,total amino acid,protein and fat content in leaves were increased by N and K application,indicated that N and K combined fertilization improved mulberry leaf quality.The treatments of only N without K decreased amminoacido metionina and fat content in leaves,while K application decreased sugar content.Silk worms fed results showed the death rate of worms was lower with the N and K fertilization leaves and cocoon weight,cocoon shell percentage and shell yield were increased.The silk cocoon quality test showed that silk worms fed with mulberry leaves from K treatments produced better quality cocoons in terms of silk worm weight,cocoon weight,reelable cocoon rate,filament length,reelability and silk neatness.N application improved cocoon quality combined with K,but had negative effect on quality without K application.The results revealed appropriate N and K management for mulberry orchards had important role on mulberry leaf product and silk cocoon yield and quality.
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Claims 14
Claim · model-written summary
Nitrogen and potassium fertilization significantly increased mulberry leaf yield.
Not reportedComparator
Verbatim
e0“N and K fertilization significantly increased mulberry leaf yield”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Nitrogen without potassium had a very limited effect on mulberry leaf yield.
Not reportedComparatorDirection
Verbatim
e0“the effect of only N without K treatment was very limited”
e1“mulberry leaf yield”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
High potassium with low nitrogen hindered improvement of mulberry leaf yield.
Not reportedComparator
Verbatim
e0“high rate K with low rate N hindered the improvement of leaf yield”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
High nitrogen and potassium produced the highest leaf yield, 35.2% above N0K0.
Verbatim
e0“high rate N and K treatment [N 450 and K2O 300 kg/(ha·a)] received the highest yield,which increased by 35.2% over N0K0 treatment”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Nitrogen and potassium increased essential amino acids, total amino acid and protein in mulberry leaves.
- Taxon
- mulberryt0
- Organ / stage
- leavese0
- Treatment
- N and K applicatione0
- Outcome
- Essential amino acids,total amino acid,proteine0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Essential amino acids,total amino acid,protein and fat content in leaves were increased by N and K application”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Nitrogen and potassium increased fat content in mulberry leaves.
- Taxon
- mulberryt0
- Organ / stage
- leavese0
- Treatment
- N and K applicatione0
- Outcome
- fat contente0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“protein and fat content in leaves were increased by N and K application”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Nitrogen without potassium decreased leaf methionine and fat content.
- Taxon
- mulberryt0
- Organ / stage
- leavese0
- Treatment
- only N without Ke0
- Outcome
- amminoacido metionina and fat contente0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“The treatments of only N without K decreased amminoacido metionina and fat content in leaves”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Potassium application decreased leaf sugar content.
Not reportedComparator
Verbatim
e0“K application decreased sugar content”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Silkworm death rate was lower when fed nitrogen and potassium fertilized mulberry leaves.
- Taxon
- mulberryt0
- Treatment
- N and K fertilization leavese0
- Interactor
- silk worm(Bombyx mori Linne)
Bombyx morie1herbivore - Outcome
- death rate of wormse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“death rate of worms was lower with the N and K fertilization leaves”
e1“silk worm(Bombyx mori Linne)”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Cocoon weight, shell percentage and shell yield increased with nitrogen and potassium fertilized leaves.
- Taxon
- mulberryt0
- Treatment
- N and K fertilization leavese1
- Interactor
- silk worm(Bombyx mori Linne)Bombyx morie2herbivore
- Outcome
- cocoon weight,cocoon shell percentage and shell yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cocoon weight,cocoon shell percentage and shell yield were increased”
e1“N and K fertilization leaves”
e2“silk worm(Bombyx mori Linne)”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Potassium treated mulberry leaves yielded better silkworm weight, cocoon weight and reelable cocoon rate.
- Taxon
- mulberryt0
- Treatment
- mulberry leaves from K treatmentse0
- Interactor
- silk wormsBombyx morie0herbivore
- Outcome
- silk worm weight,cocoon weight,reelable cocoon ratee0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silk worms fed with mulberry leaves from K treatments produced better quality cocoons in terms of silk worm weight,cocoon weight,reelable cocoon rate,filament length,reelability and silk neatness”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Potassium treated mulberry leaves improved filament length, reelability and silk neatness.
- Taxon
- mulberryt0
- Treatment
- mulberry leaves from K treatmentse0
- Interactor
- silk wormsBombyx morie0herbivore
- Outcome
- filament length,reelability and silk neatnesse0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silk worms fed with mulberry leaves from K treatments produced better quality cocoons in terms of silk worm weight,cocoon weight,reelable cocoon rate,filament length,reelability and silk neatness”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Nitrogen improved cocoon quality with potassium but worsened it without potassium.
- Taxon
- mulberryt0
- Treatment
- N applicatione0
- Outcome
- cocoon qualitye0
- Direction
- improvede0
- Qualifier
- combined with Ke0
Not reportedComparator
Verbatim
e0“N application improved cocoon quality combined with K,but had negative effect on quality without K application”
t0“mulberry (Morus atropurpurea Roxb.)”
Claim · model-written summary
Nitrogen without potassium had a negative effect on cocoon quality.
- Taxon
- mulberryt0
- Treatment
- N applicatione0
- Outcome
- qualitye0
- Direction
- negative effecte0
- Qualifier
- without K applicatione0
Not reportedComparator
Verbatim
e0“N application improved cocoon quality combined with K,but had negative effect on quality without K application”
t0“mulberry (Morus atropurpurea Roxb.)”
The same questions in other papers
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potassium · quality: protein · Morus (mulberry trees)Results agree
2 papers in the same direction as this paper
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See all 5 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.