Temat: leaf area index - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Using Vegetative Indices to Quantify Agricultural Crop Characteristics
Autorzy:: Kokhan, Svitlana
Vostokov, Anatoliy
Powiązania:: https://bibliotekanauki.pl/articles/123155.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: vegetation indice
aboveground biomass
leaf area index
leaf nitrogen concentration
Opis:: In this study, the winter wheat aboveground biomass (AGB), leaf area index (LAI) and leaf nitrogen concentration (LNC) were estimated using the vegetation indices, derived from a high spatial resolution Pleiades imagery. The AGB, LAI and LNC estimation equations were established between the selected VIs, such as NDVI, EVI and SAVI. Regression models (linear and exponential) were examined to determine the best empirical regression equations for estimating the crop characteristics. The results showed that all three vegetation indices provide the AGB, LAI and LNC estimations. The application of NDVI showed the smallest value of RMSE for the aboveground biomass estimation at stem elongation and heading of winter wheat. EVI gave the best significant estimation of LNC and showed better results to quantify winter wheat vegetation characteristics at stem elongation phase. This study demonstrated that Pleiades high spatial resolution imagery provides in-situ crop monitoring.
Źródło:: Journal of Ecological Engineering; 2020, 21, 4; 120-127
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Visual Quality and Morphological Responses of Rosemary Plants to UV-B Radiation and Salinity Stress
Autorzy:: Hamidi-Moghaddam, Abolghasem
Arouiee, Hossein
Moshtaghi, Nasrin
Azizi, Majid
Shoor, Mahmoud
Sefidkon, Fatemeh
Powiązania:: https://bibliotekanauki.pl/articles/125194.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: aesthetic value
chlorophyll
growth index
leaf area index
ultraviolet radiation
Opis:: In order to understand the effects of ultraviolet-B (UV-B) radiation and salinity stress on the visual quality and morphological parameters, one-year-old seedlings of rosemary (Rosmarinus officinalis L.) were grown under three UV-B levels (0, 4.32, 6.05 kJ m-2 d-1) and four salinity regimes (Control, 50, 100 and 150 mM NaCl) under greenhouse conditions. The results showed that enhanced UV-B radiation increased visual quality, growth index, plant biomass, shoot/root ratio, number of branches and leaves, leaf fresh and dry weight, leaf area index, specific leaf area, leaf thickness. The UV-B radiation had no significant effect on root length; however, shoot height, length of axillary shoots, length of inter node, leaf area, leaf length and width and concentration of chlorophyll b were negatively impacted by the UV-B radiation. On the other hand, salinity caused a significant decrease in plant biomass, root length, shoot height, shoot/root ratio, length of axillary shoots, length of inter node, number of branches and leaf area, leaf area index, leaf length and width, leaf fresh and dry weight, specific leaf area and concentration of Photosynthetic pigments. However, the number leaves and leaf thickness significantly increased under NaCl salinity treatments. Visual quality and growth index were hardly affected by increasing salinity until 100 mM, but declined clearly at 150 mM NaCl salinity. The interaction between UV-B irradiation and salinity showed that pre-treatment with UV-B irradiation alleviated the harmful effects of NaCl and improved the visual quality rosemary plants.
Źródło:: Journal of Ecological Engineering; 2019, 20, 2; 34-43
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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