چكيده لاتين :
Nooshkam A., D. Mazaheri, S. M. B. Hosseini and M. Mirabzadeh Ardakani. 2009. Effect of plant density and planting time on seed yield, forage yield and quality of Egyptian clover (Trifolium alexandrinum L.). Iranian Journal of Crop Sciences. 11 (4): 325- 336 (in Persian).
To study the effect of plant density and planting time on quantity and quality of forage and seed yields in Egyptian clover (Trifolium alexandrinum L.), an experiment was carried out a split-plot arrangement in a randomized complete block design with three replications in Karaj in 2007-2008 cropping season. The time of planting was assigned, on the basis of soil temperatures, at four levels (14.4 °C, 17.7 °C, 22.4 °C, 24.7 °C) to main-plots and the plant density at four levels (350,500,700,850 plant.m"2) were randomized in sub-plots. Analysis of variance for different traits showed that the effect of plant density and planting time significantaly affected fresh forage yield, dry forage yield, seed yield, the crude fiber (%) and the plant hight, however, the effect of plant density on crude protein (%) was not significant, mean comparisons for different traits showed that the crude fiber (%) decreases by increasing plant density. By increasing plant density to 700 plant.m"2, the fresh forage and the dry forage yields increased, while in higher plant densities, the forage yield significantly decreased. Seed yield have also increased up to plant density of 850 plant.m"2. In addition, results showed that delay in planting time of Egyptian clover (planting in higher soil temperatures), f resh and dry forage yield, seed yield, plant height and crude protein (%) forage decreased, while the crude fiber (%) increased.
