Study on effect of planting date and plant density on yield and yield components in irrigated pea cv. Azad in Kerman, Iran
الموضوعات : Journal of Plant ecophysiologyH. Sepanji Babaki 1 , H. Heydary sharifabad 2 , M.H. Shirzadi 3
1 - MS student, Islamic Azad University, Jiroft Branch, Jiroft, Iran.
2 - Faculty Member, Islamic Azad University, Science and Research Branch, Tehran, Iran.
3 - Faculty Member, Islamic Azad University, Jiroft Branch, Jiroft Tehran, Iran
الکلمات المفتاحية: Yield, Kerman, Planting date, Pea, Plant density,
ملخص المقالة :
In order to determine effects of planting date and plant density on yield and yield components of irrigated common Pea, cultivar Azad in Kerman city, this experiment was conducted in Kerman Agricultural and Natural Resources Research farm, in 2011-2012. Three planting dates (Feb. 15, Dec. 27, Jan. 6) and 3 plant densities (22, 33, 66 (plants/m2 )) as factori[1]al plots, were studied using RCBD. Results show that delaying in planting date decreased number of pods per plant, number of seeds per pod, and seed yield, significantly. Increasing plant density decreased number of pods per plant, number of seeds per pod but increased seed yield, significantly. The highest yield (2785.6 (kg/ha)) was harvested in first planting date and 66 plants per square meter. It seems that delay in planting decreased growth period and consequently decreased the stored materials in Pea plant and in the other hand coincided reproductive phase with warmth of spring season that decreased flower fertilization and thus increased pod hollowness and decreased seed yield. Increase in plant density decreased yield components but increased seed yield due to more plants per square meter. Increase in seed yield due to increase in plant density is limited, because increase in plant density more than 66 (plant/m2 ) increases inner and outer plant competition that would results in less yield
