Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: foliar part

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Using the conservative nature of fresh leaf surface density to measure foliar area

100%

Castillo O. S., Zaragoza E. M., Alvarado C. J., Barrera M. G., Dasgupta-Schubert N.

International Agrophysics

2014

tom 28

nr 4

For a herbaceous species, the inverse of the fresh leaf surface density, the Hughes constant, is nearly conserved. We apply the Hughes constant to develop an absolute method of leafarea measurement that requires no regression fits, prior calibrations or oven-drying. The Hughes constant was determined in situ using a known geometry and weights of a sub-set obtained from the fresh leaves whose areas are desired. Subsequently, the leaf-areas (at any desired stratification level), were derived by utilizing the Hughes constant and the masses of the fresh leaves. The proof of concept was established for leaf-discs of the plants Mandevilla splendens and Spathiphyllum wallisii. The conservativeness of the Hughes constant over individual leaf-zones and different leaftypes from the leaves of each species was quantitatively validated. Using the globally averaged Hughes constant for each species, the leaf-area of these and additional co-species plants, were obtained. The leaf-area-measurement-by-mass was cross-checked with standard digital image analysis. There were no statistically significant differences between the leaf-area-measurement-by-mass and the digital image analysis measured leaf-areas and the linear correlation between the two methods was very good. Leaf-areameasurement- by-mass was found to be rapid and simple with accuracies comparable to the digital image analysis method. The greatly reduced cost of leaf-area-measurement-by-mass could be beneficial for small agri-businesses in developing countries.

Health status of two plantations of tulip near Pulawy and fungi isolated from foliar parts and bulbs

80%

Piwoni A.

Electronic Journal of Polish Agricultural Universities. Series: Horticulture

2007

tom 10

nr 4

Ograniczanie wyników

1 Electronic Journal of Polish Agricultural Universities. Series: Horticulture

1 International Agrophysics

1 Alvarado C. J.

1 Barrera M. G.

1 Castillo O. S.

1 Dasgupta-Schubert N.

1 Piwoni A.

1 Zaragoza E. M.

1 2014

1 2007

Wyniki wyszukiwania

Using the conservative nature of fresh leaf surface density to measure foliar area

Health status of two plantations of tulip near Pulawy and fungi isolated from foliar parts and bulbs