Abstract
In this study, we investigated the effects of the combined application of different doses of potassium and organic fertilizers on the nutrient uptake, yield, and quality of Newhall navel oranges (Citrus sinensis Osb. cv.). The citrus trees were treated with potassium fertilizer alone or with one of three combinations of organic and potassium fertilizers. Spring shoots, autumn shoots, and fruit were collected when they reached maturity, and the relevant indexes were determined by conventional methods. The soil carbon flux was measured 15, 35, 65, and 95 days after fertilizer application by a soil gas flux measuring instrument. The results showed that the dry weights of leaves and twigs of the spring shoots were 43.1% and 99.8% higher in the OM15+K05-treated (15 kg organic manure and 1.05 kg potassium sulfate per plant) than in the OM0+K25-treated (1.25 kg potassium sulfate per plant) plants, respectively. Combined potassium and organic fertilizer application helped the shoots and fruits to absorb more mineral nutrients. As a result, the fruit yield increased, fruit surface color improved, and skin thickness became thinner. The internal quality of the fruit was also improved by the combination of different potassium fertilizers and organic fertilizers. The fruit quality was optimal for the OM10+K15-treated plants. The recommended doses of organic and potassium sulfate fertilizers for Newhall navel orange orchards with purple paddy soil in southwestern China are 5–10 kg/plant and 1.15–1.20 kg/plant, respectively.
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Claims 10
Claim · model-written summary
OM15+K05 treatment increased the dry weight of leaves of spring shoots by 43.1% compared with OM0+K25
Verbatim
t0“Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality”
e1“The results showed that the dry weights of leaves and twigs of the spring shoots were 43.1% and 99.8% higher in the OM15+K05-treated (15 kg organic manure and 1.05 kg potassium sulfate per plant) than in the OM0+K25-treated (1.25 kg potassium sulfate per plant) plants, respectively”
Claim · model-written summary
OM15+K05 treatment increased the dry weight of twigs of spring shoots by 99.8% compared with OM0+K25
Verbatim
t0“Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality”
e1“The results showed that the dry weights of leaves and twigs of the spring shoots were 43.1% and 99.8% higher in the OM15+K05-treated (15 kg organic manure and 1.05 kg potassium sulfate per plant) than in the OM0+K25-treated (1.25 kg potassium sulfate per plant) plants, respectively”
Claim · model-written summary
Combined potassium and organic fertilizer application increased mineral nutrient absorption by shoots and fruits
Verbatim
t0“Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality”
e2“Combined potassium and organic fertilizer application helped the shoots and fruits to absorb more mineral nutrients”
e3“The citrus trees were treated with potassium fertilizer alone or with one of three combinations of organic and potassium fertilizers”
Claim · model-written summary
Combined potassium and organic fertilizer application increased fruit yield
Verbatim
t0“Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality”
e2“Combined potassium and organic fertilizer application helped the shoots and fruits to absorb more mineral nutrients”
e3“The citrus trees were treated with potassium fertilizer alone or with one of three combinations of organic and potassium fertilizers”
e4“As a result, the fruit yield increased, fruit surface color improved, and skin thickness became thinner”
Claim · model-written summary
Combined potassium and organic fertilizer application improved fruit surface color
Verbatim
t0“Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality”
e2“Combined potassium and organic fertilizer application helped the shoots and fruits to absorb more mineral nutrients”
e3“The citrus trees were treated with potassium fertilizer alone or with one of three combinations of organic and potassium fertilizers”
e4“As a result, the fruit yield increased, fruit surface color improved, and skin thickness became thinner”
Claim · model-written summary
Combined potassium and organic fertilizer application made fruit skin thinner
Verbatim
t0“Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality”
e2“Combined potassium and organic fertilizer application helped the shoots and fruits to absorb more mineral nutrients”
e3“The citrus trees were treated with potassium fertilizer alone or with one of three combinations of organic and potassium fertilizers”
e4“As a result, the fruit yield increased, fruit surface color improved, and skin thickness became thinner”
Claim · model-written summary
Combination of different potassium and organic fertilizers improved internal fruit quality
- Taxon
- Newhall Navel Oranget0
- Organ / stage
- fruite5
- Treatment
- combination of different potassium fertilizers and organic fertilizerse5
- Outcome
- internal quality of the fruite5
- Direction
- improvede5
Not reportedComparator
Verbatim
t0“Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality”
e5“The internal quality of the fruit was also improved by the combination of different potassium fertilizers and organic fertilizers”
Claim · model-written summary
OM10+K15 treatment gave the optimal fruit quality
- Taxon
- Newhall Navel Oranget0
- Treatment
- OM10+K15-treated plantse6
- Outcome
- fruit qualitye6
- Direction
- optimale6
Not reportedComparator
Verbatim
t0“Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality”
e6“The fruit quality was optimal for the OM10+K15-treated plants”
Claim · model-written summary
Recommended organic fertilizer dose for Newhall navel orange orchards on purple paddy soil in southwestern China is 5-10 kg per plant
Verbatim
t0“Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality”
e7“The recommended doses of organic and potassium sulfate fertilizers for Newhall navel orange orchards with purple paddy soil in southwestern China are 5–10 kg/plant and 1.15–1.20 kg/plant, respectively”
Claim · model-written summary
Recommended potassium sulfate dose for Newhall navel orange orchards on purple paddy soil in southwestern China is 1.15-1.20 kg per plant
Verbatim
t0“Effects of Combined Potassium and Organic Fertilizer Application on Newhall Navel Orange Nutrient Uptake, Yield, and Quality”
e7“The recommended doses of organic and potassium sulfate fertilizers for Newhall navel orange orchards with purple paddy soil in southwestern China are 5–10 kg/plant and 1.15–1.20 kg/plant, respectively”
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