ارزیابی تاثیر تاریخ کاشت بر روی عملکرد علوفه ای چند ژنوتیپ مختلف یولاف زراعی در اهواز

To investigate the the effect of planting date on forage yield of different genotypes of oat (Avena sativa L.) an experiment was conducted in agricultural research farm of shahid chamran ahvaz university in (2013-2014). The experimental design was a factorial based on RCB with three replications. Treatments consisted of different planting dates (20 October, 5 November and 25 November) and five different genotypes of oat crops (V1, V2, V3, V4 and V5). results showed that the highest fresh and dry matter yield was obtained from first planting date. Also among genotypes, genotype V4 had the highest rate in the total dry matter and the highest fresh matter yield and LAI related to the both V3 and V4 genotype and the relative concentration of chlorophyll were highest in the V3 genotype. According to the results it appears that The first planting date due to the longer duration of growth and a favorable environmental conditions can production the highest rate of total fresh and dry matter. Also the high relative concentration of chlorophyll in the crop and availability of other favorable environmental factors can Increases the rate of photosynthesis, which leads to the production more LAI in crop.