Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

DORMANCY BREAKING OF ASH GOURD SEED THROUGH DIFFERENT PHYSICAL AND CHEMICAL METHODS (Pages : 1 - 6)

Seed dormancy of ash gourd due to thick seed coat lowers the seed germination. In this study we applied different physical and chemical methods to break dormancy of ash gourd seed in the Laboratory of Seed Technology Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh during the period from September 2009 to May 2010. The experiment was conducted by laying out in a complete randomized design using seed germinator and oven dryer for germination and vigor tests. The two factorial experiment was subjected to the following treatments viz., factor A: three storage periods viz., S1: 1 month, S2: 4 month and S3: 7 months storage of seeds and factor B: seven physical and chemical seed treating methods viz., T1: hitting the seeds on a pucca (concrete) floor from 1 meter height at 10 times, T2: cooling in deep freeze for 2 days, T3: cooling in deep freeze for 4 days and T4: cooling in deep freeze for 6 days, T5: 0.2% KNO3, T6: 0.4% KNO3, T7: 0.6% KNO3, and T8: control treatments were tested. Results revealed that physical and chemical methods, storage period and their interactions showed significant influence on releasing seed dormancy in terms of seed germination. Studies indicated that maximum seed germination (78.67%) was observed with the treatment of 0.4% KNO3 up to 7 months storage of seeds along with maximum vigor index (2.13) of ash gourd.Download