Sapwood density and bark thickness of Calophyllum inophyllum L. （a multipurpose durable timber species） were studied in various locations in Northern Australia and in Sri Lanka. Measurements were taken non-destructi...Sapwood density and bark thickness of Calophyllum inophyllum L. （a multipurpose durable timber species） were studied in various locations in Northern Australia and in Sri Lanka. Measurements were taken non-destructively by using core sampling and bark gauge. From each provenance, 4–15 mature trees having girth at breast height over bark （GBHOB） at 100–150 cm were selected on the basis of the population size. Significant （p0.05） hemispheric and provenance variations in bark thickness were found. Variations in the bark thickness are influenced by environmental variables. Variations in sapwood density were less pronounced compared to that of bark thickness. Variations in sapwood density are likely to be governed by genotypic variations.展开更多
We studied seed storage behaviour of a multipurpose tree Calophyllum inophyllum （Clusiaseae）. Seeds were collected at Roslyn bay （2307′60＂ S, 150°43′60＂ E） Central Queensland. Seed drying and desieeation ...We studied seed storage behaviour of a multipurpose tree Calophyllum inophyllum （Clusiaseae）. Seeds were collected at Roslyn bay （2307′60＂ S, 150°43′60＂ E） Central Queensland. Seed drying and desieeation tolerance tests were carried out according to International Seed Testing Association （ISTA） rules. We found C. inophyllum seeds to be recalcitrant and vulnerable to chilling injury, hence, unsuited for cold storage. C. inophyllum seeds maintained their viability for an appreciable period （〉 8 months） if stored in wanner environments.展开更多
Reproductive phenology of multiple use native plant Calo- phyllum inophyllum L. was studied in Yeppoon （23°7＇60＂ S, 150°43＇60＂ E）, northern Australia （southern hemisphere） and in Meegoda （6°18...Reproductive phenology of multiple use native plant Calo- phyllum inophyllum L. was studied in Yeppoon （23°7＇60＂ S, 150°43＇60＂ E）, northern Australia （southern hemisphere） and in Meegoda （6°18＇51＂N, 80°31＇3＂E）, Sri Lanka （northern hemisphere）. C. inophyllum trees in Yeppoon, Australia had relatively shorter flowering periods, shorter floral life spans, longer fruit life spans, smaller flowers and larger fi＇uits compared to those in Meegoda, Sri Lanka. Although the number of flower buds/ inflorescence was comparatively higher in Meegoda, C. inophyllum trees in both locations had similar mean number of mature fruits/cluster due to the higher floral abscission in C. inophyllum trees at Meegoda. Despite having a comparatively lower fruit yield （664 000 fruts·ha^-1·a^-1）, C. inophyllum trees in Yeppoon hdd lligher kernel weights （2988.0±853.2 kg·ha^-1·a^-1） and oil yields （1 33226±380.5 kg·ha^-1·a^-1） compared to those in Meegoda.展开更多
Calophyllum polyanthum is a climax tree species in the tropical rain forest of south Yunnan, China. It has excellent timber qualities and straight and orbicular bole which be favored by the local residents and be prep...Calophyllum polyanthum is a climax tree species in the tropical rain forest of south Yunnan, China. It has excellent timber qualities and straight and orbicular bole which be favored by the local residents and be prepared for selection in afforestation. But so far, the research on the afforestation techniques of this species is scarce. In this paper, we demonstrated the silviculture characters of C. polyanthum through the researches of its seed and seedling biology, the techniques of nursery, and the ecological and geographic adaptability experients in different climate zones. The results showed that:①The seeds of C. polyanthum are not resistant to storage, less than 40% of the seeds can germinate after 3 months storage under the condition of room temperature, so, it should be collected and sowed as soon as the fruits are ripe.②It is harder to be survived by planting naked root seedlings due to its flourishing and less fibrous root taproot.③The seedlings can not bear the direct sunlight, but the full sunlight is needed after several years growing. Therefore, one year old seedlings must be planted in shade or the understory of the forest, 2 years old seedlings can be planted in open area. ④1/2 of each leaf should be cut before planting if some fineroots are damaged. ⑤Good irrigation and fertilization condition are needed for the growth of C. polyanthum seedlings, and the major limitation of the plantation is low temperature the plants will die if the temperature is under 0℃ for continuous 7 days. We conclude that C. polyanthum can be planted in the mountainous areas characterized by semi shade or shade slope at 500～1 000 m above sea level to the north of the tropic of cancer, such as Southern Yunnan, Southern Guangxi and the whole Hainan Island.展开更多
文摘Sapwood density and bark thickness of Calophyllum inophyllum L. （a multipurpose durable timber species） were studied in various locations in Northern Australia and in Sri Lanka. Measurements were taken non-destructively by using core sampling and bark gauge. From each provenance, 4–15 mature trees having girth at breast height over bark （GBHOB） at 100–150 cm were selected on the basis of the population size. Significant （p0.05） hemispheric and provenance variations in bark thickness were found. Variations in the bark thickness are influenced by environmental variables. Variations in sapwood density were less pronounced compared to that of bark thickness. Variations in sapwood density are likely to be governed by genotypic variations.
文摘We studied seed storage behaviour of a multipurpose tree Calophyllum inophyllum （Clusiaseae）. Seeds were collected at Roslyn bay （2307′60＂ S, 150°43′60＂ E） Central Queensland. Seed drying and desieeation tolerance tests were carried out according to International Seed Testing Association （ISTA） rules. We found C. inophyllum seeds to be recalcitrant and vulnerable to chilling injury, hence, unsuited for cold storage. C. inophyllum seeds maintained their viability for an appreciable period （〉 8 months） if stored in wanner environments.
文摘Reproductive phenology of multiple use native plant Calo- phyllum inophyllum L. was studied in Yeppoon （23°7＇60＂ S, 150°43＇60＂ E）, northern Australia （southern hemisphere） and in Meegoda （6°18＇51＂N, 80°31＇3＂E）, Sri Lanka （northern hemisphere）. C. inophyllum trees in Yeppoon, Australia had relatively shorter flowering periods, shorter floral life spans, longer fruit life spans, smaller flowers and larger fi＇uits compared to those in Meegoda, Sri Lanka. Although the number of flower buds/ inflorescence was comparatively higher in Meegoda, C. inophyllum trees in both locations had similar mean number of mature fruits/cluster due to the higher floral abscission in C. inophyllum trees at Meegoda. Despite having a comparatively lower fruit yield （664 000 fruts·ha^-1·a^-1）, C. inophyllum trees in Yeppoon hdd lligher kernel weights （2988.0±853.2 kg·ha^-1·a^-1） and oil yields （1 33226±380.5 kg·ha^-1·a^-1） compared to those in Meegoda.
文摘Calophyllum polyanthum is a climax tree species in the tropical rain forest of south Yunnan, China. It has excellent timber qualities and straight and orbicular bole which be favored by the local residents and be prepared for selection in afforestation. But so far, the research on the afforestation techniques of this species is scarce. In this paper, we demonstrated the silviculture characters of C. polyanthum through the researches of its seed and seedling biology, the techniques of nursery, and the ecological and geographic adaptability experients in different climate zones. The results showed that:①The seeds of C. polyanthum are not resistant to storage, less than 40% of the seeds can germinate after 3 months storage under the condition of room temperature, so, it should be collected and sowed as soon as the fruits are ripe.②It is harder to be survived by planting naked root seedlings due to its flourishing and less fibrous root taproot.③The seedlings can not bear the direct sunlight, but the full sunlight is needed after several years growing. Therefore, one year old seedlings must be planted in shade or the understory of the forest, 2 years old seedlings can be planted in open area. ④1/2 of each leaf should be cut before planting if some fineroots are damaged. ⑤Good irrigation and fertilization condition are needed for the growth of C. polyanthum seedlings, and the major limitation of the plantation is low temperature the plants will die if the temperature is under 0℃ for continuous 7 days. We conclude that C. polyanthum can be planted in the mountainous areas characterized by semi shade or shade slope at 500～1 000 m above sea level to the north of the tropic of cancer, such as Southern Yunnan, Southern Guangxi and the whole Hainan Island.
