关键词: 角斑病, 角斑病, 发生规律, 综合防治

Abstract: [Objective][Method] In this paper, the ecological relationship of herbaceous plant communities in a Crataegus Pinnatifid Orchard at the pomology institute in Shanxi academy of agricultual sciences were studied using the methods of two-way indicator species analysis (TWINSPAN) and detrended-correspondence analysis (DCA). The purpose of this study was to provide a scientific management the herbaceous plants in Crataegus Pinnatifid Orchard. [Result] The results showed that there were 53 herbaceous plant species (i.e., weeds) belonged to 26 families and 48 genera in the orchard, among which the three families of Compositae, Gramineae and Leguminosae, perennial plants, and mesophytes plant accounted for 45.29%, 58.49% and 56.60%, respectively. The 42 quadrats of herbaceous plants in the orchard were classified into eight associations. The results of TWINSPAN classification reflected the distribution characteristics of the herbaceous plant associations and life-span changes of dominant species in the Orchard, and were confirmed by the two-dimensional ordination diagram of DCA, that is, the dominant species of the herbaceous plants gradually changed from annual species to perennial species along the second axis of DCA from top to bottom. However there was no obvious distribution regularity of herbaceous plant ecotypes in the DCA ordination diagram, and the species diversity of the association (Ⅵ) dominated by mesophytes was higher than that of the associations (Ⅴ and Ⅶ) dominated by xerophytes, which indicated that human disturbance had obvious influence on the community of herbaceous plant in the Orchard. [Conclusion] Rational regulation of herbaceous plant quantity in future management of the Orchard will promote the quality and yield of hawthorn fruit.