The effect of some experimental treatments on the germination of Cupressus arizonica seeds. Cupressus arizonica L.

This research aims study the effect of different treatments in activate and increase percentage of germination Cupressus arizonicaL.seeds to use plants in forestation projects, seeds were get from mature conifers, and tested by different treatments with control, then cultured within polyethylene bags many times to calculate indicators of germination. The results showed that the soaking the seeds Cupressus arizonicaL. in citric acid 0.1% with cold wet stratification for 30 days at 4-5c gave higher germination percentage 75%.The treatments of the soaking seeds in sulfuric acid0.1% and hydroxide sodium 0.1% with cold wet stratification for 30 days gave respectively 60%-53% .But superiority was not significant. Other treatments; soaking the seeds in tap water 24h with cold wet stratification for 30 days gave only 36%.But the control treatment gave lower germination percentage of all just only 9%. The treatment of soaking seeds in citric acid 0.1% with cold wet stratification for 30 days surpassed the rest of the treatments in effect on plant height at the end of the experiment.

Impact of some Transactions on improving the germination percetage of canary Pine seeds (Pinus canariensis Sweet ek spreengel)

The results shows that, the cold wet of Canary pine seeds stratification for 15 days at (4-5c◦),gave higher germination percentage( 91.11%). The treatment of soaking seeds with superiority was not significant. Other treatments; the cold wet stratification of seed for(30) days at(4-5c◦), soaking seeds with tap water for (48 h.) and the control, all gave lower germination percentages, but still higher than (60%). The treatment of soaking seeds with GA had significant superiority in the speed of germination (2.32 day ∕ seed), but it was not significant with the cold wet stratification.