Utilization of native plants in urban landscaping can potentially support their conservation and safeguard endangered native species from extinction. In this study, efforts were made to standardize vegetative propagat...Utilization of native plants in urban landscaping can potentially support their conservation and safeguard endangered native species from extinction. In this study, efforts were made to standardize vegetative propagation techniques for Lycium shawiL Nitraria retusa and Farsetia aegyptia. Effects of varying concentrations of rooting hormones on the success of rooting of hardwood cuttings of these species were studied in this research. Rooting in hardwood cuttings of Lycium shawii was enhanced （100%） by treating them with 1,000 ppm IBA, Ormone radicante in polvere （5,000 ppm NAA） and hormex （1,000 ppm IBA）. Treatment with 1,000 ppm NAA was found to be effective for Nitraria retusa, while marginal success was recorded in rooting of hardwood cuttings of Farsetia aegyptia when treated with 400 ppm NAA. Rooting in untreated cuttings was 80%.展开更多
Five species of foraging and breeding sea turtles have been identified in Vietnam, they are Green turtle （Chelonia mydas）, Loggerhead turtle （Caretta caretta）, Olive ridley turtle （Lepidochelys olivacea）, Hawksb...Five species of foraging and breeding sea turtles have been identified in Vietnam, they are Green turtle （Chelonia mydas）, Loggerhead turtle （Caretta caretta）, Olive ridley turtle （Lepidochelys olivacea）, Hawksbill turtle （Eretmochelys imbricata） and Leatherback turtle （Dermochelys coriacea）. Among them, with the exception of Loggerhead turtle （Caretta caretta）, four species have been being lay eggs on the beaches along the country. However, these populations have been strongly suffered by human activities for decades. The number of foraging and breeding Hawksbill and Leatherback sea turtles has dramatically decreased, and Olive Ridley turtle has almost disappeared on their traditional nesting beaches. Beside the reason of harvesting eggs and nesting turtles by catch or by purpose, the developments in coastal areas where sea turtles laying eggs such as in shrimp aquaculture, tourist resort and residential area developments etc., also contributed to this decline of sea turtles. Despite the fact that the recent raising awareness programs on protection and conservation of the sea turtle were very well done with the participation of many organizations and provinces, this important animals still face the risk of extinction in Vietnam.展开更多
文摘Utilization of native plants in urban landscaping can potentially support their conservation and safeguard endangered native species from extinction. In this study, efforts were made to standardize vegetative propagation techniques for Lycium shawiL Nitraria retusa and Farsetia aegyptia. Effects of varying concentrations of rooting hormones on the success of rooting of hardwood cuttings of these species were studied in this research. Rooting in hardwood cuttings of Lycium shawii was enhanced （100%） by treating them with 1,000 ppm IBA, Ormone radicante in polvere （5,000 ppm NAA） and hormex （1,000 ppm IBA）. Treatment with 1,000 ppm NAA was found to be effective for Nitraria retusa, while marginal success was recorded in rooting of hardwood cuttings of Farsetia aegyptia when treated with 400 ppm NAA. Rooting in untreated cuttings was 80%.
文摘Five species of foraging and breeding sea turtles have been identified in Vietnam, they are Green turtle （Chelonia mydas）, Loggerhead turtle （Caretta caretta）, Olive ridley turtle （Lepidochelys olivacea）, Hawksbill turtle （Eretmochelys imbricata） and Leatherback turtle （Dermochelys coriacea）. Among them, with the exception of Loggerhead turtle （Caretta caretta）, four species have been being lay eggs on the beaches along the country. However, these populations have been strongly suffered by human activities for decades. The number of foraging and breeding Hawksbill and Leatherback sea turtles has dramatically decreased, and Olive Ridley turtle has almost disappeared on their traditional nesting beaches. Beside the reason of harvesting eggs and nesting turtles by catch or by purpose, the developments in coastal areas where sea turtles laying eggs such as in shrimp aquaculture, tourist resort and residential area developments etc., also contributed to this decline of sea turtles. Despite the fact that the recent raising awareness programs on protection and conservation of the sea turtle were very well done with the participation of many organizations and provinces, this important animals still face the risk of extinction in Vietnam.
