Wyniki wyszukiwania

1

Optymalne zaopatrzenie gleb i roslin w skladniki pokarmowe

100%

Fotyma M.

Biuletyn Informacyjny IUNG

|

2001

|

tom 16

17-20

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Biochemical and physiological responses of Eruca sativa Mill. to selected nutrient conditions

100%

Hanaka A., Dresler S., Nurzynska-Wierdak R.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2016

|

tom 15

|

nr 4

The present study deals with biochemical and physiological methods for assessment of the optimal nutrient supply for the growth and development of garden rocket (Eruca sativa Mill.), edible vegetable. Two nitrate (0.3; 0.6 g N dm⁻³ of medium) and three potassium doses (0.3; 0.6; 0.9 g K dm⁻³ of medium) in the form of sulphate or chloride were examined. At the higher nitrate dose and the sulphate form of potassium the intense green colour of leaves, higher content of nitrates, flavonoids, L-ascorbic acid and lower carbohydrates content correlated with elevated growth parameters, e.g. the number of leaves and partially plant fresh weight. The proline and anthocyanin contents weakly diversified the nutrient supply. Despite the lack of modification in the photosynthetic pigment concentration, the chlorophyll fluorescence parameters were significantly improved when the higher nitrate dose accompanied the sulphate form of potassium (higher values of fluorescence decrease, maximum quantum efficiency of PSII photochemistry in the dark-adapted state, photochemical quenching and lower values of the fraction of absorbed light energy not used for photochemistry). The biochemical and photosynthetic parameters corresponding to the morphological characteristics (leaf colour, number of leaves and plant fresh weight) indicated that better nutrient conditions were provided to plants under the combined fertilization of the higher nitrate dose and the sulphate form of potassium.

3

Health condition of Norway spruce Picea abies (L.) Karst. stands in the Beskid Mts

70%

Holusa J.

Dendrobiology

|

2004

|

tom 51 Supplement

The health condition of spruce stands in the Moravian-Silesian Beskids is affected by several predisposition factors, the most important of which is the allochthonous character of spruce grown on improper sites. When exposed to a low supply of nutrients and intensive mechanical damage mainly by game, the trees are susceptible to rot infestations, climatic agents and mechanical destruction by snow, hard rime and wind. At present, air pollution does not show any significant impact on the spruce stands; it rather acts as a less important predisposition factor on mountain peaks. The physiological condition of trees is not impaired to the extent which would facilitate infestation with phytophagous or cambioxylophagous insects.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 Biuletyn Informacyjny IUNG

1 Dendrobiology

1 Dresler S.

1 Fotyma M.

1 Hanaka A.

1 Holusa J.

1 Nurzynska-Wierdak R.

1 2016

1 2004

1 2001

Optymalne zaopatrzenie gleb i roslin w skladniki pokarmowe

Biochemical and physiological responses of Eruca sativa Mill. to selected nutrient conditions

Health condition of Norway spruce Picea abies (L.) Karst. stands in the Beskid Mts