Effect of the Method of Plant Protection on the Yield, Root Development and Formation of Vegetation Indices of Faba Bean Canopy

B. KULIG1, T. GŁĄB2, A. OLEKSY1, A. KLIMEK-KOPYRA1, M. KOŁODZIEJCZYK1 and T. ZĄJAC1
1 University of Agriculture, Institute of Crop Production, 31-120 Krakow, Poland
2 University of Agriculture, Institute of Machine Exploitation, Ergonomy and Production Processes, 30-149 Krakow, Poland

Abstract

KULIG, B., T. GŁĄB, A. OLEKSY, A. KLIMEK-KOPYRA, M. KOŁODZIEJCZYK and T. ZĄJAC, 2014. Effect of the method of plant protection on the yield, root development and formation of vegetation indices of faba bean canopy. Bulg. J. Agric. Sci., 20: 381-390

 

Field studies were carried out in 2006-2008 at the Experimental Station of Prusy, belonging to the University of Agriculture in Kracow. The aim was to determine the yield, vegetation indices of above ground plant parts and characteristic of root system in topsoil. The study covered two methods of plant protection; conventional (CPP – insecticides and fungicides) and ecological (EPP – organic insecticides and fungicides) and two varieties of faba bean: Leo and Nadwiślański. Weather conditions modified the seed yield. The highest yield was obtained in 2007 when the rainfall distribution was similar to the multiyear distribution, while the lowest in 2008, with long-term drought from April to June. Conventional plant protection of faba bean resulted in a seed yield increase of 72.6% comparing to the control, and EPP increased the yield by 26.1%. Nadwiślański cultivar among the tested varieties had the higher yielding potential. The indices of root system (RLD , SRL , RD M and MD) were not significantly dependent on the method of plant protection or cultivar. The declining tendencies for RLD , SRL , RD M indices under the influence of chemicals application and increasing one for MD were noted. Leo cultivar was characterized by higher RLD and SRL values in the 0-30 cm soil layer. The value of assimilation leaf area (LAI) depended on the research years and development stage. Regardless of experimental factors, the greatest assimilation leaf area faba bean achieved between 12 June and 6 July. The method of plant protection had a significant impact on the development of this index only in 2008. After reaching the maximum leaf area, faba bean protected in a conventionally way was characterized by a higher value of leaf area index (LAI) comparing to control and ecological protection (EPP ).

Key words: Vicia faba L., organic plant protection, seed yield, yield components, parameters of the root system, LAI, NDVI
Abbreviations: m – meter, cm – centimeter, mm – millimeter, nm – nanometer, t – tone, kg – kilogram, g – gram, mg – milligram, ha – hectare, C – control, CPP – conventional insecticides and fungicides, EPP – organic insecticides and fungicides, RLD - root length density, SRL - specific root length, RD M - root dry matter, MD - mean root diameter, LAI - Leaf Area Index, NDVI - Normalized Difference Vegetation Index, SR - Simple Ratio Index, IR VI – Inverse Ratio Index

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