بررسي كشت مخلوط ارقام مشخصي از سويا

Intercropping is defined as simultaneous planting of more than one species in a piece of land sufficiently close to each other so that interspecific competition occurs. In order to study the possibility of obtaining higher yields, intercropping of soybean cultivars was conducted during the 1999-2000 growing season at the agricultural experimental farm of Tehran University. In this study total yield and components yield in sole culture and intercropping were evaluated. The experimental design was a factorial with 3 replications in which the first factors were 3 different plant densities (20, 40 and 80 plant per 1 m2) and second factors were five different cropping ratios (100:0, 75:25, 50:50, 25:75 and 0:100 Hag and Clark 63 cultivars, respectively). The results showed that, the treatment of 50:50 (2 rows Hag+2 rows Clark) had the highest total yield. Calculated Land equivalent ratio (LER) showed that the seed yield of mixture of 50:50 Hag and Clark with 80 plant/m2 had highest LER i.e. 1.07. By increasing plant density number of pods per plant decreased. There was no significant difference between number of seed in pod and 1000 seed weight.