ارزيابي اثرات تك آبياري و تراكم كاشت بر توليد نخود فرنگي Pisum sarivum L در شرايط ديم در استان همدان

Effects of Supplemental Irrigation and Crop Density on Dry-land Pea (Pisum sativum L.) Production, Hamedan Province

In order to study the effect of crop density and supplemental irrigation on yield, yield components, and some other quantitative and qualitative characteristics of pea in dry-land system, an experiment was conducted in Nahavand during 2004-2005 crop year. The experimental design was an RCBD of split plot lay out with four replications. The main plots consisted of four dry farming levels (dry farming without supplemental irrigation, dry farming + supplemental irrigation at planting, dry farming+ supplemental irrigation at 50% flowering stage, and dry farming + supplemental irrigation during pods filling stage). Four plant densities (17, 22, 33 and 67 plants/m2) were allocated to the subplots. The results showed that supplemental irrigation leads to increased biological yield (303 kg/ha), grain yield (678.67 kg/ha), no. of seeds per plant (16 seeds/plant), 100-grain weight (7 gr) and Harvest Index (14). Supplemental irrigation led to a decrease in of grain protein percentage. Number of pods and seeds per plant were reduced with an increase in crop density. The highest grain yield (2096.93 kg/ha) as well as the highest biological yield (5773.56 kg/ha) were obtained from a maximum crop density (67 plants/m2).