بررسی اثر آللوپاتیکی کلزا بر شاخص‌های جوانه‌زنی سویا

Study the canola(Brassica napus L.) allelopathic effects on soybean germination index Among crop plants , canola contain allelochemical compounds as glucosinolate that under special condition is released to environment and efects to seed germination and plant growth . The aim of this research was to study the inhibitory effects of decompositions extracts of canola ( Okapi cultivar) in during different times on soybean(Williams cultivar) germination index.Trial was carried out in R.C.B design, with four replications . Seeds of canola were planted on pots , after flowering 30 whole plants were mixed to 10 Kg of pot soil and after one, two and three weeks from these mixtures(decompositions) were extracted and obtained 5 concentrations( 0,25%,50%,75% and 100%) of that. Then 20 ml of each concentration was added to soybean medium that includes 50 soybean seeds. Results showed that extract of first week decomposition had inhibitory effect more than other weeks on normal seedling percentage, mean time germination, seedling length vigor index and seedling weight vigor index. Also 100% concentration of extracts have more inhibitory effect than other concentrations on germination index of soybean.