| pythium vexans causing patch canker of rubber trees on hainan island, china. | this is the first report of patch canker disease of rubber trees (clone rrim600) in china. it is characterized by discrete irregular patches of rotted, discolored bark and wood, accompanied by a decrease in latex flow. a total of seven isolates of pythium vexans were obtained from the diseased bark of the trunks and roots of rubber trees. inoculating these isolates into healthy, mature rubber trees resulted in symptoms similar to patch canker and the same fungal species was re-isolated from the ... | 2005 | 15983748 |
| variation of soil fertility and carbon sequestration by planting hevea brasiliensis in hainan island, china. | the development of rubber industry depends on the sustainable management of rubber plantation. to evaluate the environmental effects of planting hevea brasiliensis on a subsystem of tropical forest ecosystem, the variation of soil fertility and carbon sequestration under rubber plantation within 30-year life period were investigated in hainan island. results showed that (1) with the increase of stand age of rubber plantation, soil fertility decreased all along. from 1954 to 1995, soil organic ma ... | 2007 | 17918599 |
| the environment, not space, dominantly structures the landscape patterns of the richness and composition of the tropical understory vegetation. | the mechanisms driving the spatial patterns of species richness and composition are essential to the understanding of biodiversity. numerous studies separately identify the contributions of the environment (niche process) and space (neutral process) to the species richness or composition at different scales, but few studies have investigated the contributions of both types of processes in the two types of data at the landscape scale. in this study, we partitioned the spatial variations in all, e ... | 2013 | 24278417 |