Agronomy Science, przyrodniczy lublin, czasopisma up, czasopisma uniwersytet przyrodniczy lublin
The paper determines the variability of leaf area index (LAI), and photosynthetic active radiation absorption index (PAR), depending on the genotype of wheat and intensity of cultivation technology. A two-factor field experiment was conducted in 2012–2013 at the Felin Experimental Farm of the University of Life Sciences in Lublin, using a method of randomized blocks in 4 replications. The first factor were 4 species (subspecies) of spring wheat. The second factor was the level of agricultural technology. The obtained results showed that both the genotype of spring wheat and intensification technology differentiated the LAI and PAR indices. Irrespective of the applied production intensity, the highest value of the leaf area index and photosynthetic active radiation were attained by the common wheat cultivar Parabola in the blooming and heading phases, and by the husked wheats (spelt and emmer) in the milk ripeness phase. The lowest value was noted for durum wheat SMH 87. A higher level of cultivation technology – irrespective of the genotype – generally resulted (with the exception of PAR in blooming phase) in an increase of both indices in the analysed genotypes. An effect of the analysed factors o changes of the LAI index was demonstrated only in the blooming phase, while a positive effect of the higher cultivation technology intensity on the analysed index was observed in the case of common wheat, emmer wheat and spelt wheat. A variation of the indices under study was also observed in the years of the study.
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