The effect of plant density and harvesting time on grain yield, protein and rate of seed fall of different fodder vetch species in rainfed conditions
Subject Areas : Crop Production ResearchBabak Pasari 1 , Khosro Mohammadi 2
1 - Associate Professor, Department of Agronomy and Plant Breeding, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran.
2 - Associate Professor, Department of Agronomy and Plant Breeding, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran.
Keywords: Density, Protein, Seed loss, Vetch, Yield,
Abstract :
In order to investigate the effect of plant density and harvesting time on grain yield, protein and the rate of seed loss of different types of fodder vetch under rainfed conditions, an experiment was conducted in two different climatic locations in the rainfed lands of Dehgolan and Sanandaj cities in Kurdistan province in 2023-2024. The experiment was carried out in the form of split- split plots in the form of a basic design of randomized complete blocks in three replications. The main factor included three harvest times of 5 days apart and the secondary factor included two density levels of 70 and 80 kg/ha. Also, the sub-sub-factor including three vetch species vicia pannonica, vicia villosa and vicia sativa was considered. The results showed that the plant height increased with the increase of plant density. Also, among the compared species, villosa had the maximum plant height. The interaction effect of plant and species density also showed that the maximum plant height was observed in the density of 80 kg/ha and villosa species. In this experiment, grain yield increased with increasing plant density. Also, among the compared species, pannonica had the highest seed yield, and the seed yield in Sanandaj region had a significant increase compared to Dehgolan region. The interaction effect of place in species also showed that the highest seed yield was observed in pannonica species in Sanandaj region and the interaction effect of species in density showed that pannonica species produced more seed yield at a density of 80 kg/ha. In this experiment, with a delay in harvesting, the rate of seed loss increased. Although statistically no significant difference was observed between vetch species, pannonica species had the lowest percentage of seed loss. The maximum amount of seed protein was also observed in villosa species, which had a significant difference with other species.
