Aerial Seeding Chinese Pine Communities Characteristics And Its Growth Influenced By Meteorological Factors

Through investigate the forest vegetation of Aerial Seeding Chinese Pine communities from 2001 to 2007 in Kalaqin of Chifeng, using the methods of the space instead of time-series sequence, research the characteristics of the Aerial Seeding Chinese Pine communities. And combined with meteorological data of the seven consecutive year (2001～2007), research aerial Chinese pine growth and climate factors related to the law. The main results are as follows:1. The main plant populations in Aerial Seeding Chinese Pine communities were dominated by herbaceous plants in Kalaqin from 2001 to 2007. Compositae ,Leguminosae and Gramineae, respectively, accounted for the total plant species community of 23.44%, 15.63% and 14.06%. Single family plant accounted for 65.22% of the total community plant family, the number of species accounted for the total community plant species of 23.44%. The community composition was the smaller family with more species, but more with less species. The result indicated that plants of Aerial Seeding Chinese Pine communities had larger vulnerability, and had more extinction risk. Therefore the aerial Seeding Chinese Pine communities had not yet formatted a relatively stable community types.2. With the growth time longer of Aerial Seeding Chinese Pine, the trends changes of the height, coverage and density were all increased significantly. With the growth time longer, the more obvious changes. The coverage and height of plant populations of Aerial Seeding Chinese Pine communities were both declined trend from 2001 to 2007, but its density did not change significantly.3. Positive correlation exists between the number of survival Chinese pine and the density of Heteropappus altaicus (Willd.)Novopokr. Astragalus melilotoides Pall. Lespedeza dahurica Schindl. Lespedeza hedysaroides Kitag. and Artemisia sacrorum Ledeb. Correlation coefficient, respectively, were 0.083, 0.239, 0.506, 0.012 and 0.372. There was a significant positive correlation under the level 0.05 between the number of survival Chinese pine and the density of Lespedeza dahurica Schindl. And there was a significant positive correlation under the level 0.1 between the number of survival Chinese pine and the density of Artemisia sacrorum Ledeb. However, there was extremely significant negative correlation between the number of survival Chinese pine and the density of Oxytropis fetissovii Bunge. Through multiple linear regression analysis there was a significant positive regression relation under the level 0.05 between the number of survival Chinese pine and the density of Lespedeza dahurica Schindl and Artemisia sacrorum Ledeb, Cleistogenes chinensis (Maxim.) Keng. Therefore when Aerial Seeding Chinese Pine can be considered mixed Pine seeds with Lespedeza dahurica Schindl. Artemisia sacrorum Ledeb. and Cleistogenes chinensis (Maxim.) Keng.4. The total annual precipitation was the main restrictive factors of the number of survival Chinese pine. The number of survival plants of the pine influenced by the factor of climate that the influence order was the total annual precipitation> relative humidity> the total hours of sunshine> temperature. Temperature was the major impact factor of height and number of branches changes of Aerial Seeding Chinese Pine.