INFLUENCE OF PREPARATIONS WITH DIFFERENT BIOLOGICAL EFFECT ON CHARACTERISTICS RELATED TO THE PHOTOSYNTHETIC PROCESS OF SPRING FORAGE PEA | ВЛИЯНИЕ НА ПРЕПАРАТИ С РАЗЛИЧНО БИОЛОГИЧНО ДЕЙСТВИЕ ВЪРХУ ПОКАЗАТЕЛИ, СВЪРЗАНИ С ФОТОСИНТЕТИЧНИЯ ПРОЦЕС ПРИ ПРОЛЕТЕН ФУРАЖЕН ГРАХ
2010
Georgieva, N., Institute of Forage Crops, Pleven (Bulgaria) | Nikolova, I., Institute of Forage Crops, Pleven (Bulgaria) | Ilieva, A., Institute of Forage Crops, Pleven (Bulgaria)
The experimental activity covered the 2007-2009 period. The trial was carried out by the split plot method. The objective of this study was to extend the physiological characterization of the influence of preparations with different biological effect in spring forage pea, determining their action on the parameters of leaf area, net productivity of photosynthesis and synthesis of leaf pigments. The results showed that the use of Atonic 0.6 l/ha, Маsterblend - 1600 g/ha and Confidor 70 WG - 150 g/ha alone and combined increased the size of leaf area and the content of leaf pigments chlorophyll a, chlorophyll b and carotenoids by 1.5 tо 25.8 and by 6.5 tо 59.4 %, respectively. The maximum values were found for the combined use of Confidor and Masterblend. The preparations studied had a positive influence on the value of net productivity of photosynthesis within the range of 2.5-8.4%. The highest increase was found after treatment with Masterblend alone and with the triple combination of Confidor with Atonic and Masterblend, which was due to the smaller leaf area formed in these variants.
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