对位于晋冀交界处的典型北方草甸群落的垂直结构和多样性以及不同亚层物种的叶级谱、叶片形状、叶倾角、叶片数和冠(径进行统计分析,盒子”此外,根据株高可将草甸群落划分为3 其中第2 丛)多样性指数、Pielou 丰富度指数均最大,亚层的各项指标均最小;第2丛)亚层的最低。第1第2第3个亚层的植物均以小叶型为主;亚层植物均具3 ~10 叶片一般兼具茎生叶和基生叶,且以斜叶型(为主;亚层以具3 ~10 枚叶片的植物为主,且以斜叶型为主;亚层以具3 ~10 叶片有阔卵形、卵形和披针形,叶倾角约90°)用长宽比较大的长方形“模拟第1用正方形“和长宽比小于第1盒子”亚层,盒子”亚层,盒子冶模型。根据该模型,、中间层次种类占50%其种数和株(数可因景观需求和立地条件而异。

According to community construction mechanism based on plant traits, vertical structure and diversity of typical northern meadow community located at border of Shanxi Province and Hebei Province and scale spectrum, shape, inclination angle, number of leaf and crown (tuft) diameter of species in different sub-layers were statistically analyzed, and hereby, community vertical section was simulated and constructed by “ Box” model. Besides, suitable configuration species in different sub-layers were proposed based on common wild species in meadow of North China. The results show that according to plant height, meadow community can be divided into three sub-layers, in which species and individual (tuft) numbers, important value, Shannon-Wiener diversity index, Pielou evenness index and Gleason richness index of the second sub-layer are the biggest, and those of the first sub-layer are the smallest. At the same grade of important value, crown (tuft) diameter of species in the second sub-layer is the highest, and that in the first sub-layer is the lowest. Stem type of species in the first sub-layer is erect with no or less branch, that of species in the second sub-layer is mainly cespitose, and that of species in the third sub-layer is mainly stoloniferous or rosette. Leaf of species in three sub-layers is mainly microphyll type. In the first sub-layer, leaf number of species all is the range of 3-10, with both cauline leaf and basal leaf, shape of cauline leaf is mainly ovate and lanceolate, and mainly oblique leaf type (leaf inclination angle 30°-60°). In the second sub-layer, leaf number of species is mainly the range of 3-10 and 11-30, leaf shape is linear, lanceolate, ovate and broadly ovate, and mainly oblique type type. In the third sub-layer, leaf number of species is mainly the range of 3-10, leaf shape is broadly ovate, ovate and lanceolate, and all are flat leaf type (leaf inclination angle about 90°). Based on characters of species in each sub-layer, rectangle “Box”with the larger ratio of length to width is used for simulating the first sub-layer, square “Box” and rectangle “Box” with ratio of length to width smaller than that of the first sub-layer are used for simulating the second sub-layer, rectangle “Box” with the smallest ratio of length to width is used for simulating the third sub-layer, hereby, “Box” model of vertical section of northern meadow community is constructed. According to this model, suitable configuration of artificial wildflower combination community is 20% of high species, 50% of middle height species, and 30% of low species, and their numbers of species and individuals (tufts) can vary with landscape demand and site condition.