بررسي اثر تراكم و تركيبات كاشت بر عملكرد كمي و كيفي علوفه در زراعت مخلوط سويا و ذرت علوفه اي در شرايط آب و هوايي اهواز

The study of density and plant combination on performance of forage quality and quantity of corn and soybean mixture in the climate condition in Ahvaz

A trial was conducted in order to study the effect of density and plant combination on yield and quality of performance of forage corn and soybean mixture on experimental farm of agronomy and plant breeding of agriculture college in Shahid Chamran University. A randomized complete block design (factorial experiment) with 4 replications was used in the trial. Factors were 3 densities (local optimum density, maximum and minimum density) and 5 mixture combinations (Monocultures of corn and soybean, 75% corn: 25% soybean, 50% corn: 50% soybean: 25% corn: 75% soybean). Strip planting procedure was used to form the mixture. Optimum density for corn and soybean were 75000 and 200000 respectively. Silage of corn and soybean was harvested simultaneously. Results from the study showed that in general from the viewpoint of dry matter yield, density treatments had a significant difference (P<0.01), but plant combination treatments and their interactions had no significant difference at the same level of probability. Treatment D3M4 (75% soybean: 25% corn, with maximum density) by a yield of 16 tons (DM/ha) and treatment D1M2 (25% soybean: 75% corn with minimum density) by a yield of 7. 16 tons (DM/ha) had the highest and lowest production respectively. To calculating of land equilibrium ration (LER), it was cleared that treatment D3M4 by a 12% increase had the most profitability in comparison with monocultures of both crops with 1719 kg crude protein and LER - 1.14 by a 14% increase of crude protein in comparison with monocultures of two crops. That above treatment showed preference over other treatments. The absorption of N, P and K in the plants by density is increased.