Abstract
A field trial with two Vitis vinifera L. cultivars, viz. Bukettraube (white) and Heroldrebe (red), grafted onto Ramsey, was carried out over a nine-year period on a sandy, duplex soil. The control (No) received no N, while three other treatments each received 50 kg N/ha in inorganic form. The N was applied either as three equal installments, split between budbreak, fruitset and post-harvest (N1), or as a single application at budbreak (N2), or as a single postharvest application (N3). A fifth treatment (N4) received 50 kg N/ha at budbreak in the form of poultry manure. A winter cover crop (rye) was sown after harvest, chemically controlled before budbreak with a herbicide and left as an organic mulch on the soil surface. This cover crop management system maintained the soil's organic material (SOM) at the original level for all inorganic treatments, while N4 increased SOM. On average, Bukettraube yielded 11.4 t/ha, in comparison to only 6.0 t/ha for Heroldrebe. Yields of the four fertilised treatments (Ni, N2, N3 and N4) were comparable for each individual cultivar. Relative to N0, fertilisation increased yields by 24% and 48% for Bukettraube and Heroldrebe, respectively. In comparison to the control, all four fertilisation treatments increased shoot mass, with Nz being significantly higher than Ni, NJ and N4. The fact that Nz stimulated shoot growth, without a concomitant increase in yield, indicated that a single application of N at bud break can cause excessive growth, even on low-potential soil. In the case of Bukettraube, grapes from the Nz treatment showed the highest incidence of bunch rot during some seasons. Under the cultivation practices followed in this trial, split applications of N (budbreak, fruitset, post-harvest) or a single application during the post-harvest period was compatible with the most desirable pattern of vine growth and fruit development. Application of poultry manure was not associated with any specific advantages or disadvantages. Soil analysis showed that the control vines were fairly well supplied with mineral N at budbreak, but under-supplied at the time of fruitset.
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Claims 9
Claim · model-written summary
Poultry manure increased soil organic material.
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while N4 increased SOM.”
e1“for all inorganic treatments, while N4 increased SOM.”
t0“Grapevines”
Claim · model-written summary
Bukettraube yielded 11.4 t/ha, above Heroldrebe at 6.0 t/ha.
- Taxon
- Vitis vinifera L.
Vitis viniferae1 - Material
- Bukettraubee0
- Outcome
- yieldede0
- Direction
- in comparison to onlye0
- Value
- 11.4 t/hae0
- Qualifier
- 6.0 t/hae0
- Comparator
- Heroldrebee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On average, Bukettraube yielded 11.4 t/ha, in comparison to only 6.0 t/ha for Heroldrebe.”
e1“A field trial with two Vitis vinifera L. cultivars”
Claim · model-written summary
Fertilisation increased Bukettraube yield by 24% relative to the control.
- Material
- Bukettraubee0
- Treatment
- fertilisatione0
- Outcome
- yieldse0
- Direction
- increasede0
- Value
- 24%e0
- Comparator
- N0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative to N0, fertilisation increased yields by 24% and 48% for Bukettraube and Heroldrebe, respectively.”
t0“Grapevines”
Claim · model-written summary
Fertilisation increased Heroldrebe yield by 48% relative to the control.
- Material
- Heroldrebee0
- Treatment
- fertilisatione0
- Outcome
- yieldse0
- Direction
- increasede0
- Value
- 48%e0
- Comparator
- N0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative to N0, fertilisation increased yields by 24% and 48% for Bukettraube and Heroldrebe, respectively.”
t0“Grapevines”
Claim · model-written summary
All four fertilisation treatments increased grapevine shoot mass relative to control.
- Treatment
- all four fertilisation treatmentse0
- Outcome
- shoot masse0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison to the control, all four fertilisation treatments increased shoot mass”
t0“Grapevines”
Claim · model-written summary
The Nz treatment produced significantly greater shoot mass than Ni, NJ and N4.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with Nz being significantly higher than Ni, NJ and N4.”
e1“all four fertilisation treatments increased shoot mass, with Nz being significantly higher than Ni, NJ and N4.”
t0“Grapevines”
Claim · model-written summary
Bukettraube grapes under Nz showed the highest bunch rot incidence during some seasons.
- Material
- Bukettraubee0
- Treatment
- Nz treatmente0
- Outcome
- incidence of bunch rote0
- Direction
- higheste0
- Qualifier
- during some seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the case of Bukettraube, grapes from the Nz treatment showed the highest incidence of bunch rot during some seasons.”
t0“Grapevines”
Claim · model-written summary
Split nitrogen applications or single post-harvest application were judged compatible with desirable vine growth and fruit development.
- Treatment
- split applications of N (budbreak, fruitset, post-harvest) or a single application during the post-harvest periode0
- Outcome
- most desirable pattern of vine growth and fruit developmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“split applications of N (budbreak, fruitset, post-harvest) or a single application during the post-harvest period was compatible with the most desirable pattern of vine growth and fruit development.”
t0“Grapevines”
Claim · model-written summary
Poultry manure had no specific advantages or disadvantages.
- Treatment
- Application of poultry manuree0
- Outcome
- specific advantages or disadvantagese0
- Direction
- not associatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of poultry manure was not associated with any specific advantages or disadvantages.”
t0“Grapevines”
The same questions in other papers
fertilization · yield · VitisResults differ
96 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
103 papers more in this group
See all 107 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.