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Papyrifera woody forage plant, the Sankoh deciduous tree, adaptable, resistant to drought and barren, and growth in the water. Hi calcareous soil can also be grown in the acidic, neutral soil. Xi Yang, in the shade of the trees can grow normally. Papyrifera natural distribution of the Yellow River, Yangtze River and Pearl River Basin are distributed in the North Slope of Qinling Mountains, the Yellow River and the upper reaches of the Yangtze River region, the vertical distribution above the altitude of 1 600 m. Papyrifera solidarity soil, water and soil conservation, windbreak and sand to absorb dust, anti-pollution, drought, cold, purify the air, improve the environment, promote ecological balance. With high-fiber, protein-rich (20% of 3 0%), amino acids, vitamins, carbohydrates and trace elements, high-quality raw materials for the production of paper and of beasts that feed. Ecological studies on the structure of the tree is mainly related to the structure tree of drought stress, salt stress, relationship with the soil, these aspects of the relationship with the microbial community Broussonetia papyrifera Photosynthetic Physiological and ecological aspects of the study of literature also rarely involved. Based on this, the test for the to different primers ground papyrifera materials, comparison of photosynthesis to provide a theoretical basis for the structure of the tree screening and production practices. Select from 10 different primers places papyrifera summer photosynthesis comparative studies, results showed that the poor condition of Wuhan, Shantou, Jiangsu 3 configuration tree growth, Pn, Gs, Ci, WUE lower, Tr higher, Pn increased with PAR and CO 2 response curve flattening trend in AQY of CE smaller, Pn Japanese dynamic curves of the two peaks. Shandong papyrifera growth conditions in the middle level. From Zhanjiang, Japan, and Guangxi, Guangzhou, Guangzhou, Henan 6 papyrifera growth conditions, Pn, Gs, Ci, (WUE) the, Tr lower Pn and PAR and CO 2 response curve upward trend sharply AQY of CE larger Pn day dynamic curve of the two peaks. Select the season from Zhanjiang, Shandong, Japan, Guangzhou, Guangxi 5 papyrifera photosynthesis dynamic research results showed papyrifera photosynthetic parameters With the PAR, CO 2 , TL, RHS seasonal changes of environmental factors and changes in the photosynthetic capacity of the order of summer, autumn, spring, winter, followed by decline, while the small difference between the fall and spring. Pn, Gs, Ci value summer gt; fall gt; Spring gt; winter. Ci fall higher value, making the summer, little difference between the fall and spring. Tr value performance is highest in summer, fall and spring smaller, the lowest in winter. Performance WUE for winter, spring and fall high, and low in summer. AQY performance summer gt; Spring gt; fall gt; winter, higher in the winter and spring of AQY special circumstances. The LSP performance of the fall, winter, spring, larger in summer smaller. LCP greater performance for the fall and winter, spring and summer smaller. CE performance for the summer, fall, spring, followed by winter minimum. Basically all papyrifera seasons CSP or less. The CCP performance for the summer and winter, autumn and spring low.
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