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Wu Y.-K.,Guizhou Academy of Forestry | Ou G.-T.,Forestry Bureau of Loudian County | Yu J.-Y.,Guizhou Academy of Forestry
Australasian Plant Disease Notes | Year: 2011

A serious root rot disease in nurseries and plantations of J. curcas has been observed in Luodian County, Guizhou Province, China, since 2006. The symptoms were yellowing, wilting and leaf fall as well as blackening and rotting of the roots and collars. Laboratory examination and greenhouse pathogenicity tests showed that the causal agent of the disease was Nectria haematococca. This is the first report of N. haematococca, as the cause of root rot of Jatropha curcas L. in China. © 2011 Australasian Plant Pathology Society Inc.

Zai-Hua Y.,Guizhou University | Zai-Hua Y.,Chinese Academy of Forestry | Zai-Hua Y.,Guizhou Academy of Forestry | Xiao-Ming C.,Chinese Academy of Forestry | Mao-Fa Y.,Guizhou University
Zootaxa | Year: 2015

Two species, Ptecticus brevispinus sp. nov. and P. guangxiensis sp. nov., from China are described and illustrated. Additional two species, P. longispinus Rozkošný & Kovac, 2003 and P. melanurus (Walker, 1848), are recorded from China for the first time. A checklist of the known Chinese Ptecticus Loew, 1855 species together with their geographical distribution and a new identification key (19 spp.) are presented. Copyright © 2015 Magnolia Press.

Wang B.,Chinese Academy of Forestry | Ding F.-J.,Chinese Academy of Forestry | Ding F.-J.,Guizhou Academy of Forestry
Beijing Linye Daxue Xuebao/Journal of Beijing Forestry University | Year: 2010

The present conditions and existing problems in the standardization of long-term located observation of forest ecosystems, and the importance, principle, objective and the overall design of constructing the standard system for the long-term observation of forest ecosystems in China were expounded and the overall design was made in six aspects, i. e. construction of the forest ecosystem research stations, the operational management, the criteria system for long-term observation, observation methods, data management and data utilization. The overall design is very important both theoretically and practically for guiding the research and formulation of criteria system, for accelerating the standardization process of long-term observation of forest ecosystems, impelling the healthy and orderly development of forest ecosystem research stations and the network among them and promoting the ability in network research.

Tian Y.,Nanjing Forestry University | Takanashi K.,Tokyo University of Agriculture and Technology | Toda H.,Tokyo University of Agriculture and Technology | Haibara K.,Tokyo University of Agriculture and Technology | Ding F.,Guizhou Academy of Forestry
Journal of Forest Research | Year: 2013

Nitrogen (N) is the most limiting nutrient for forest development. In this study, using a natural pH gradient, N and carbon (C) mineralization was investigated and the effects of soil pH as well as the total C and N contents and the soil C/N ratio were evaluated in forest soils after mountain closure in a karst region. The N availability was poor based on the low N mineralization potential (N0) and the low active fraction of soil total N (N0/total N), while high microbial decomposition activity was indicated by a high mineralization rate constant (kN). N0 was positively correlated with soil pH as well as the total C and N contents. Additionally, multiple regression analysis revealed that total CN (the product of the soil total C and total N contents) and the C/N ratio had more significant effects on N0 than soil pH. In contrast, the mineralization rate constants kN and kC were positively affected by soil pH. The results indicated that N availability was regulated by soil organic matter (SOM), while microbial activity was restricted by soil pH. Also, the lack of nitrification and the high C0/N0 ratio observed at soil pH <5.5 may be a strong indicator of alterations to the microbial composition prompted by severe soil acidification. Further research is required to determine the changes in soil microbial composition with the drop in soil pH and their effects on SOM decomposition and nutrient availabilities. © 2012 The Japanese Forest Society and Springer.

Yang Z.-H.,Guizhou University | Yang Z.-H.,Guizhou Academy of Forestry | Rozkosny R.,Masaryk University | Yang M.-F.,Guizhou University
Zootaxa | Year: 2015

Oxyceroides gen. nov., including three new species, O. gracilis sp. nov., O. sinica sp. nov. and O. tangi sp. nov. from South China in the Oriental region are described and illustrated. Related genera from other biogeographical realms are briefly discussed. Identification keys to the known Oriental Oxycerini and to the three new species of Oxyceroides are given. © 2015 Magnolia Press.

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