Abstract
The effects of nitrogen (N), phosphorus (P), and potassium (K) fertilization were investigated in a field trial with Vitis vinifera L. var. Chenin blanc over a period of 11 years. Three levels of N (16, 56, and 96 kg N/ha/yr), P (0, 9, and 18 kg P/ha/yr), and K (0, 45, and 90 kg K/ha/yr) were tested in a 3 x 3 x 3 factorial layout on a gravelly sandy loam soil containing 1.1% organic material, 12.7 mg P/kg, and 38 mg K/kg. Nitrogen fertilization increased yield and shoot growth slightly but reduced the pH of the topsoil. It was concluded that the N-supplying capacity of the soil was nearly sufficient to satisfy the N demand of the vines, which had an average yield of 13t/ha, and that an additional fertilization of only 40 kg N/ha was justified in this case. Phosphorus fertilization increased P levels in both topsoil and subsoil and also had a positive effect on yield and shoot growth. Evidence of a P/K antagonism was encountered. Apparently, little P fixation occurred, and it was found that less than 9 kg P/ha/yr was needed on this P-deficient soil to ensure optimum yield and growth. Potassium fertilization increased K levels in the soil as well as yield and shoot mass. A fertilization level of less than 45 kg K/ha/yr was needed on this soil with its marginal initial K content and a soil norm of 50 mg/kg seemed appropriate for K.
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Claims 11
Claim · model-written summary
N fertilization slightly increased vine yield and shoot growth.
- Taxon
- Vitis vinifera L. var. Chenin blanc
Vitis viniferae1 - Treatment
- Nitrogen fertilizatione0
- Outcome
- yield and shoot growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilization increased yield and shoot growth slightly”
e1“Vitis vinifera L. var. Chenin blanc”
Claim · model-written summary
N fertilization reduced topsoil pH.
- Taxon
- Vitis vinifera L. var. Chenin blancVitis viniferae1
- Treatment
- Nitrogen fertilizatione0
- Outcome
- pH of the topsoile0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilization increased yield and shoot growth slightly but reduced the pH of the topsoil.”
e1“Vitis vinifera L. var. Chenin blanc”
Claim · model-written summary
Soil N supply was nearly sufficient and only 40 kg N/ha added fertilizer was justified.
- Taxon
- Vitis vinifera L. var. Chenin blancVitis viniferae1
- Outcome
- an additional fertilization of only 40 kg N/hae0
- Qualifier
- nearly sufficiente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the N-supplying capacity of the soil was nearly sufficient to satisfy the N demand of the vines, which had an average yield of 13t/ha, and that an additional fertilization of only 40 kg N/ha was justified in this case.”
e1“Vitis vinifera L. var. Chenin blanc”
Claim · model-written summary
P fertilization increased soil P levels in topsoil and subsoil.
- Taxon
- Vitis vinifera L. var. Chenin blancVitis viniferae1
- Treatment
- Phosphorus fertilizatione0
- Outcome
- P levels in both topsoil and subsoile0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus fertilization increased P levels in both topsoil and subsoil”
e1“Vitis vinifera L. var. Chenin blanc”
Claim · model-written summary
P fertilization had a positive effect on vine yield and shoot growth.
- Taxon
- Vitis vinifera L. var. Chenin blancVitis viniferae1
- Treatment
- Phosphorus fertilizatione0
- Outcome
- yield and shoot growthe0
- Direction
- positivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus fertilization increased P levels in both topsoil and subsoil and also had a positive effect on yield and shoot growth.”
e1“Vitis vinifera L. var. Chenin blanc”
Claim · model-written summary
The study found evidence of P/K antagonism.
- Taxon
- Vitis vinifera L. var. Chenin blancVitis viniferae1
- Outcome
- P/K antagonisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Evidence of a P/K antagonism was encountered.”
e1“Vitis vinifera L. var. Chenin blanc”
Claim · model-written summary
Little P fixation apparently occurred.
- Taxon
- Vitis vinifera L. var. Chenin blancVitis viniferae1
- Outcome
- little P fixatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparently, little P fixation occurred”
e1“Vitis vinifera L. var. Chenin blanc”
Claim · model-written summary
Less than 9 kg P/ha/yr was needed for optimum vine yield and growth.
- Taxon
- Vitis vinifera L. var. Chenin blancVitis viniferae1
- Outcome
- less than 9 kg P/ha/yre0
- Qualifier
- P-deficient soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“less than 9 kg P/ha/yr was needed on this P-deficient soil to ensure optimum yield and growth.”
e1“Vitis vinifera L. var. Chenin blanc”
Claim · model-written summary
K fertilization increased soil K levels.
- Taxon
- Vitis vinifera L. var. Chenin blancVitis viniferae1
- Treatment
- Potassium fertilizatione0
- Outcome
- K levels in the soile0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium fertilization increased K levels in the soil as well as yield and shoot mass.”
e1“Vitis vinifera L. var. Chenin blanc”
Claim · model-written summary
K fertilization increased vine yield and shoot mass.
- Taxon
- Vitis vinifera L. var. Chenin blancVitis viniferae1
- Treatment
- Potassium fertilizatione0
- Outcome
- yield and shoot masse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium fertilization increased K levels in the soil as well as yield and shoot mass.”
e1“Vitis vinifera L. var. Chenin blanc”
Claim · model-written summary
Less than 45 kg K/ha/yr was needed and a 50 mg/kg soil norm appeared appropriate.
- Taxon
- Vitis vinifera L. var. Chenin blancVitis viniferae1
- Outcome
- less than 45 kg K/ha/yre0
- Qualifier
- a soil norm of 50 mg/kge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A fertilization level of less than 45 kg K/ha/yr was needed on this soil with its marginal initial K content and a soil norm of 50 mg/kg seemed appropriate for K.”
e1“Vitis vinifera L. var. Chenin blanc”
The same questions in other papers
fertilization · yield · Vitis vinifera (wine grape)Positive and negative results
16 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
17 papers more in this group
See all 21 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.