بررسی و ارزیابی ارقام جدید سورگوم علوفه‌ای در شرایط آب و هوایی منطقه معتدل کرج

In this research, new forage sorghum varieties, in order to evaluate the performance under Karaj moderate condition to determine the most suitable variety, could be provided to beneficiaries. This experiment were conducted on a randomized complet block design in four replications, during three years in 2007-2009. Four traits including fresh fodder, dry matter, plant hieght and tiller number were measured in each cutting. All of treatments harvested at two cutting. Combined analysis of variance showed significant differences between yeares, varieties, cutting, year * variety, variety * cutting , year* cutting and year * variety* cutting interactions for all of traits at 1% of probability . According to means comparised, the highest fresh fodder, dry matter and plant height obtained from KFS3 with 91.4, 16.91 t/ha and 195.8 Cm. respectively. KFS6 produced the lowest fresh fodder and dry matter with 53.3 and 10.93 t/ha respectively. The lowest plant height obtained from KFS10 with 138.9 Cm. KFS10 and KFS1 were produced the highest and lowest tiller number with 3.0 and 2.2 No. respectively. According to two cuttings mean, fresh fodder and dry matter production Doubles per year. These varieties can be provided to beneficiaries after completing the agronomic tests.