Rootstock selection affects vineyard fertilising
Written by torosidiswine
One of the most important parts of vineyard management is fertilization. In order to draw up the appropriate fertilization program for each vineyard and for each variety separately, producers should understand the function of the nutrients they apply to the vineyard and know its management history.
The role of nutrients within the plant is essential information for the development of a balanced nutrition program for each vineyard, but it is not the only information required to achieve the desired results.
Nutrients occur naturally in various forms, but plants generally show a selective preference for some of these forms. For example, nitrates and ammoniacal ions are forms of nitrogen, but generally nitrates are more available to the plant than ammoniacal ones. The availability of nutrients is often determined by soil properties. The presence of microorganisms in the soil can help convert nutrients into forms available for absorption by plants.
The variety and the rootstock used contribute decisively to the determination of nutrient requirements. Vigorous rootstocks are better able to obtain the necessary nutrients from the surrounding soil. This means that they require fewer nutrients than a subject with less vigor.
Vigorous rootstocks are better able to obtain the necessary nutrients from the surrounding soil. This means that they require fewer nutrients than a subject with less vigor.
Vitality and duration of the germ cycle of known rootstocks
|
Subject |
Vividness |
Stem cycle |
|
101-14 |
M-H |
Small |
|
Schwarzmann |
M-H |
Small |
|
3309 |
M-H |
Average |
|
S04 |
M |
Average |
|
5C Teleki |
M |
Average |
|
5BB Kober |
M-Y |
Average |
|
110 Richter |
M |
Very Large |
|
1103 Paulsen |
M-Y |
Large |
|
99 Richter |
M-Y |
Average |
|
140 Ruggeri |
Y-M |
Very Large |
|
K51-32 |
M-Y |
Large |
|
K51-40 |
M-Y |
Large |
|
Ramsey |
Y-M |
Very Large |
Nicholas (1997) M: Moderate, X: Low, Y: High
Πηγή : Bell S-J and P.A. Henschke , 2005. Implications of nitrogen nutrition for grapes , fermentation and wine. Australian Journal of Grape and Wine Research 11 , 242-295
The establishment of a magnesium fertilization program must also take into account the rootstock used.
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