期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Keqiao Trade Fair Stands Out on Three Features——2009 CHINA KEQIAO INTERNATIONAL TEXTILE EXPO ceremoniously opens
1
《China Textile》 2009年第11期11-11,共1页
On the morning of October 25th,2009,China Keqiao International Textile Expo (autumn) opened ceremoniously in China Textile City International Convention & Exhibition Center. "Large-Scale,internationalization
关键词 EXPO CHINA KEQIAO INTERNATIONAL TEXTILE EXPO ceremoniously opens Keqiao Trade Fair stands Out on Three features
下载PDF
The influences of biotic and abiotic factors on the occurrence and severity of poplar canker disease in Qingfeng County, China and the management implications 被引量:3
2
作者 Zhigang Ma Jingle Zhu +5 位作者 Zhiqiang Sun Jun Liang Zhaoxin Zhang Limin Zhang Lijuan Sun Wenjuan Li 《Journal of Forestry Research》 SCIE CAS CSCD 2015年第4期1025-1034,共10页
Landscape pathology is a research approach that can provide validation of the effectiveness of regional controls of forest disease at a landscape scale. In this paper, we analyzed the effects of stand features, manage... Landscape pathology is a research approach that can provide validation of the effectiveness of regional controls of forest disease at a landscape scale. In this paper, we analyzed the effects of stand features, management approaches, and geographical locations on poplar canker disease incidence (DI) and disease severity index (DSI) of individual trees at a 10 km x 10 km mesoscale landscape in Qingfeng County, China. DI varied significantly with stand age, tree densities, and the degree of canopy closure. DI in stands younger than 4 years old was significantly lower than that in the stands over 6 years old and reached the highest value at a stand age of 8-10 years. Overall, DI was positively correlated with stand age, stand density, andthe degree of canopy closure. DI was significantly lower in agro-forest stand patches than in other three patch types, i.e. isolated patch, pure stand patch, and mixed stand patch. Poplar plantations distributed around and near to villages exhibited significantly higher DI mainly due to human activities and herbivores. Fragmentation or connectivity in this mesoscale landscape seemed not impact disease occurrence. DSI was not significantly correlated with stand density, but varied significantly with tree varieties and trees ages. DSI was highest in stands of 10-12 year trees for all poplar varieties we studied here. Plantation density and plantation age were thus critical factors in determining DI and DSI. A logistic predictive model of disease occurrence was developed for the study area, considering varieties, age, height, density, canopy cover, stand types, patch types, management status, and stand geographical locations. Our study here shows that adjustment of stand density by thinning at different plantation ages is an effective approach controlling the occurrence canker disease in short-rotation poplar plantations at the landscape scale. 展开更多
关键词 Landscape pathology Poplar plantation Canker disease - Disease incidence - Disease severityincidence - stand features Adaptation
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部