| Aquilaria sinensis is unique precious, rare economic trees. Its body is a treasure, versatile, high economic value, and is a unique and precious medicinal plants in recent years, due to the often taken for medicinal, forest damage is very serious, now only sporadic scattered remnants of plants. In this paper, forest understory vegetation and soil sinensis Plantation Chengmai state as the research object, through the forest floor Aquilaria plantation community to investigate, control of its species composition characteristics and key community structure. On this basis, combined with domestic and foreign research scholars and forestry actual situation, designed and constructed forest-green manure plant, forest-medical plant, forest-agriculture and forest-herb understory vegetation business modes. Construction under Aquilaria Plantation vegetation healthy business model evaluation system from the effects of forest growth, effects of soil fertility, pest status and other aspects of the quality of understory vegetation understory vegetation Aquilaria business model evaluation and discussion. The resulting conclusions are as follows:(1) The construction of undergrowth vegetation healthy modes in Aquilaria plantation. Through the forest floor Aquilaria plantation community to investigate kept informed about their community structure and species composition characteristics. In this community, the species of Gramineae, Leguminosae, Euphorbiaceae, Asteraceae, Brassicaceae, sedge and other more, a total of 21 genera and 23 species accounted for in the total sample, respectively genera and species appeared half. Plots within many species is uncommon, mostly single species, its proportion of the total number of genera 78.57%, indicated a high dispersion of the composition. According to the survey results, combined with the actual situation of Woodland and consulted expert opinion, constructed two forest-green manure plant modes,namely Arachis duranensis and Desmodium heterocarpon,the forest-medical plant mode,namely Pipersarmentosum and Stephania epigaea.the forest-agriculture mode,namely Arachis hypogaea and Ipomoea batatas,the forest-herb mode,namely Zoysia tenuifolia and Sedum lineare, while built non grassland and native grassland as contrast modes.(2) Analysis of understory vegetation growth effect. Contrast the average high,the average diameter and its growth of plots before and after.The forest-green manure plant mode in Aquilaria sinensis tree height growth rate were increased by 24.02% and 20.72%, average diameter growth rate were increased by 13.67% and 12.95%, The forest-green manure plant mode 1 to slightly better than The forest-green manure plant mode 2, forest-agriculture mode best, forest-herb mode times, the effects on growth of forest-herb mode slightly outperforms agroforestry pattern and forest-medical mode is better than the contrast plots.(3) Analysis on the effect of soil fertility of different modes. The effect of the soil fertility of forest-green manure plant mode lwas slightly different from that of the mode 2, which was a little over the whole. Forest pattern 1 plots in fertilizer, planting of Arachis duranensis soil organic matter content by 48.48%, available Fe and Zn were increased by 25.08% and 29.51%. forest-green manure plant mode 2 increased effective Ca and effective Mn content is better, the increase rate was 13.96%, and 22.92%.Forest-green manure plant mode for advantage is obvious, regardless of the organic matter content increased degree, or soil elements and trace elements, forest-green manure plant mode to better than forest-agriculture mode, forest-herb mode and forest-medical mode.(4) Evaluation of forest vegetation quality. Through the review of the related literature domestic and international, consulted relevant experts to determine the understory vegetation quality evaluation index, which are color, density, uniformity, texture, vegetation cover, vegetation height, green period, nine indexes:Ping speed, strength of vegetation. A model of turf quality evaluation:ZL=0.10MD+0.05ZD+0.10 YS+0.10JYX+0.10LQ+0.05ZBGD+0.10GD+0.20SD+0.20QD. Substituted into the model calculation according to the 12 experts scoring results and comprehensive quality of vegetation under the forest total ordering for Arachis duranensis (4.1)> Zoysia tenuifolia (3.9)>Arachis hypogaea (3.6)>Desmodium heterocarpon (3.5)> Ipomoea batatas (3.4)>Sedum lineare (3.3)>Stephania epigaea (3.1)>native grassland (2.95)>Piper sarmentosum (2.85)>non grassland (0).(5) Construction and Evaluation Incense Plantations vegetation healthy business model evaluation model. A review of a large number of relevant literature, combined with the actual situation of Chengmai forest farm select tree height, diameter growth, soil organic matter, PH value, macroelements,mediumelements, pests and understory quality 8 indicators.Analyzed data,weight value of each Index. Weighting give mode under health evaluation index system:JKD=0.1926SG+0.2136DJ+0.0866PH+0.1232 YJZ+0.1105DLY+0.0723ZWLY+0.1382BCH+0.0630ZL. Brought data,the health degree is obtained.Each mode of operation the health of the sort of Arachis duranensis(0.6908)>Desmodium heterocarpon(0.6378)>Arachis hypogaea (0.6247)>Sedum lineare (0.5785)> Ipomoea batatas (0.5775)>Piper sarmentosum (0.5621)>Zoysia tenuifolia (0.5213)>Stephania epigaea (0.5157)>native grassland (0.4527)>non grassland (0.3376).Based on results, health of the test sample to was higher than that of the control sample, indicating understory vegetation can promote the growth,maintain the balance of ecosystem. Hainan Province,health management can give priority to Arachis duranensis and Desmodium heterocarpon.Arachis duranensis and Desmodium heterocarpon belong to the legume family,fix atmospheric nitrogen provides fertilizer, promote height and diameter growth. Arachis hypogaea and Ipomoea batatas of forest-agriculture mode was next to Arachis duranensis and Desmodium heterocarpon. The effect was in improving soil fertility effect. The understory of Arachis hypogaea and Ipomoea batatas can bring economic benefits and explored and studied by the combination of forestry and agriculture as ecological management measures. At the same time, the overall effect of forest-herb mode and forest-medical mode general, although Sedum lineare and Zoysia tenuifolia effects on improving soil fertility effect, effect is better in promoting the growth of Aquilaria sinensis. To an extent, it can regulate the climate, but also increase the aesthetic value. Finally, Piper sarmentosum and Stephania epigaea of forest-medical mode and not only have medicinal value, but create minor forest products, increase the added value of forestry, promote the development of economic forest. |
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