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Calculation example for the mean cover proportion of a species (CS) occurring in replicate plots with different total cover of vegetation (CV)Tabelle 3_ Berechnungsbeispiel zur Ermittlung des durchschnittlichen Deckungsgrades einer Art (CSmean) bei Vorliegen unterschiedlicher Gesamtdeckungsgrade (CV) in Wiederholungsflächen
| Replicate plot | CS (area-%) | CV (area-%) | CSZ (area-%) |
|---|---|---|---|
| 1 | 20 | 140 | 14.3 |
| 2 | 25 | 110 | 22.7 |
| 3 | 20 | 125 | 16.0 |
| 4 | 25 | 115 | 21.7 |
| Average | 22.5 | 121.3 | 18.7 |
Suitability and specific properties of selected survey methods for grassland vegetationTabelle 4_ Eignung und spezifische Eigenschaften ausgewählter Erhebungsmethoden für Pflanzenbestände im Grünland
| Method | Recordable parameters | Properties and requirements | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Density | Cover | Yield proportion | Frequency | Accuracy/Repeatability | Subjectivity | Time effort | Need for special devices | Dependency on weather conditions | |
| Visual estimation | x | x | +* | ++++ | +** | - | + | ||
| Counting frame | x | +++ | + | + | + | + | |||
| Frequency frame | x | ++ | + | ++ | + | + | |||
| Linear analysis | x | x | ++ | + | +++ | + | + | ||
| Point intercept | x | x | x | ++ | + | +++ | ++ | ++ | |
| Manual separation | x | +++ | + | ++++ | + | - | |||
| Photography*** | (x) | x | x | +++ | - | + | +++ | +++ | |
| Spectrometry**** | +++ | - | + | ++++ | ++++ | ||||
Classification of a plant community based on different botanical parameters (Weinzierl, 1902)Tabelle 1_ Klassifizierung der Pflanzengesellschaft auf Basis unterschiedlicher botanischer Parameter (Weinzierl, 1902)
| Species | Yield proportion (%) | Cover (%) |
|---|---|---|
| Common reed (Phragmites communis) | 25 | 5 |
| Canary grass (Phalaris arundinacea) | 20 | 5 |
| Tall fescue (Festuca arundinacea) | 18 | 10 |
| Bent grass (Agrostis vulgaris) | 17 | 65 |
| 15 other species | 20 | 15 |
| total | 100 | 100 |
| grassland type | = Phragmitetum | = Agrostietum |
Information about forage yield, forage quality and suitability for forage conservation deducible from the sward typeTabelle 2_ Aus dem Pflanzenbestandestyp ableitbare Informationen über Futterertrag, Futterqualität und Eignung zur Futterkonservierung
| Sward type | Rich in grasses | Balanced | Rich in forbs | Rich in legumes |
|---|---|---|---|---|
| Yield potential | ++ | + | + | - |
| Crude protein potential | - | + | + | ++ |
| Forage quality stability along phenological development at the first cut | - | + | + | ++ |
| Easiness of silage conservation | ++ | + | - | - |
| Drying speed | ++ | + | - a | + |
| Risk of crumbling losses | - | - | + | + |
| Risk of contamination with soil | - | - | + | +/++ |