نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار گروه زراعت و اصلاحنباتات، دانشکده کشاورزی، دانشگاه کردستان، سنندج
2 مدرس مدعو گروه زراعت و اصلاحنباتات، دانشکده کشاورزی، دانشگاه کردستان، سنندج
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
To determine the cardinal temperatures and variation of ground cherry′s germination, an experimentwas conducted based on a completely randomized design with 4replications in the weed laboratory at Kurdistan University in 2018. Treatments were 5, 10, 15, 20, 25, 30, 35, 40 and 42.5 ºC. Also, the effect of seed burial (20 cm) duration on germination variations, another experiment was conducted based on completely randomized design with 8 levels of seed burial time (1 and 2 weeks, 1, 2, 3, 4, 5 and 6 months) with 4replications. Furthermore, to investigate the germination, the cumulative germination and germination speed were measured in both tests. Results showed that 5 and 10 ºC have no effect on ground cherry′s germination but others temperatures significantly (p= 0.05) changed germination speed and cumulative germination. The best temperatures for cumulative germination parameter were 40 and 42.5 ºC and the worst was the 20 ºC. Additionally, both parameters were significantly (p= 0.05) affected by the seed burial duration in all treatments, so that the maximum cumulative germination (a), slope of germination variation (b), and time to 50% of germination (t0) parameters were minimized in all seed burial duration treatments but there was a significant difference between seed burial duration, especially between short periods and longer periods. Finally, it can be said that in infested area with ground cherry′s, using deep tillage and burying seeds deep in the soil and after that using minimum or no tillage, the rate of contamination may be significantly reduced.
کلیدواژهها [English]
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