Light absorption and light extinction in barley ( Hordeum vulgare L.) as affected by planting dates and plant genotypes
- PDF / 498,465 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 14 Downloads / 171 Views
ORIGINAL PAPER
Light absorption and light extinction in barley (Hordeum vulgare L.) as affected by planting dates and plant genotypes N. Kamali 1 & M. R. Khajeh Pour 1 & A. Soleymani 1,2 Received: 31 March 2020 / Accepted: 20 July 2020 # Springer-Verlag GmbH Austria, part of Springer Nature 2020
Abstract Plant light absorption and extinction may affect plant growth and yield. A split plot experiment (with three replications) was carried out in the Research Field of Agricultural College, Islamic Azad University, Isfahan, Iran, during 2011–2012 in order to determine the influence of light absorption and extinction on barley growth and yield. Planting dates including Oct 10th (P1), 25th (P2), and Nov 10th (P3) and plant genotypes including Nosrat (N), 4Shur (S), and Fajr 30 (F) were used as the main- and sub-plots, respectively. Plant growth and yield as well as crop light absorption and extinction were determined at different growth stages. Using a light meter, the rate of photosynthetically active radiation of canopy in the range of 400–700 nm was determined (41–57%). Light extinction coefficients (0.355–0.485) were also determined according to the Beer-Lambert law. Planting dates and genotypes significantly affected crop growth, yield, and response to light. S resulted in the highest rate of light extinction and absorption at P1 and P3, respectively, and it also resulted in the highest rate of grain yield (4228 kg ha−1) and harvest index (40.9). These results indicated the positive correlation between the growth and yield of barley genotypes with light absorption and extinction. Such findings can be used for a more efficient designing of a barley canopy with higher growth and yield. Keywords Beer-Lambert law . Crop yield . Harvest index . Photosynthetically active radiation . Plant growth
1 Introduction Barley is among the most important industrial crop plants produced in Iran. According to FAO statistics, Iran has produced 2.8 and 3.0 million tons of barley in 2014 and 2015, respectively, and 1.4 million tons of barley was also imported into the country. The production of enough food for the world’s ever increasing population is a great challenge, and requires higher effort, and suitable agricultural practices, which result in the production of higher food (Wezel et al. 2014). The effects of different agricultural practices on plant growth and yield production have been greatly investigated. However, more has yet to be researched on plant and climatic factors affecting canopy light properties including light absorption and light extinction (Proutsos et al. 2019).
* A. Soleymani [email protected] 1
Department of Agronomy and Plant Breeding, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan P.O. BOX: 81595-158, Iran
2
Plant Improvement and Seed Production Research Center, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
Light absorption is an important parameter affecting plant growth and yield production. The photosynthesis process is the most important physiological proc
Data Loading...
