Effects of Sowing Dates on Seed Germination and Seedling Growth of Jatropha curcas L.in Spring
In the pot experiment,the Jatropha curcas cultivar FD-8 was used,and four sowing dates (The time was 2013-03-17,2013-04-06,2013-04-26 and 2013-05-16,respectively) in spring were conducted to investigate the effects of sowing dates on seed germination and seedling growth.Results showed that as sowing date delayed,the germination rate was decreased,the speed of germination and seedling emergence were improved,the dry matter accumulation and stem high of plant were significantly increased,and the seedlings had obvious growth advantages in seedling stage and after transplanting.For Jatropha curcas germination and sowing,the mean air temperature steadily pass 17-18 ℃ was the critical temperature,above 21.7 ℃was the more suitable mean air temperature.In the present study,the suitable sowing time for Jatropha curcas is in the period from late April to early May.
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万方数据
维普
