ÃÞ »¨ ѧ ±¨ Cotton Science 2009£¬21(5)£º405-409
Effects of Temperature on Germination and Dormancy of Cottonseeds Abstract£ºIn order to know the effect of temperature on germination and dormancy of cottonseeds during storage, fuzzy and coated cottonseeds with dormancy were studied, germination,germination potential£¨GP£©, the percentage of fresh seeds(PF), fresh weight and length of seedling were analyzed and compared during and after 4 years storage. Fuzzy and coated samples with dormancy were stored at room temperature,0¡æ and -18¡æ from April 2005 to April 2008. Seeds containing 11% or less moisture were sealed in the plastic bags and stored. One hundred seeds were sampled from each sample to conduct germination trials at 30 ¡æ for a 7 days period every year. Effects of one factor of temperature,and two factors reciprocal action of temperature and storage periods were studied during 4 years storage. The one factor results showed that temperature was not significant to the change of germination and GP of coated seeds and germination of fuzzy seeds, it was obviously significant to GP of fuzzy seeds and PF of both fuzzy and coated. The reciprocal action effects of temperature and years effected the germination and dormancy of fuzzy and coated seeds significantly. Effects of temperature on fresh weight and length of seedlings were different between fuzzy and coated seeds. Lower temperature could postpone the dormancy breaking, decelerated the speed of the increase of germination, put off the deterioration, and increased the longevity of cottonseeds.The results of 0 ¡æ were better than the other two temperture.
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