Based on above - mentioned analysis , the strategy and measures to prevent the soil fertility quality degradation of artificial picea mature forest and improve the stand ecological environment were put forward , including the rational management of inter - cutting down and fostering after artificial picea forest matured . because conifer - hardwood forests generally contain more tree species than pure coniferous forest , and their structure also is more complex , forestation in subalpine of western sichuan should be conifer - hardwood forests 林地土壤有机质主要来源于凋落物的分解，并受其分解速率的控制，解决当前人工成熟林地土壤退化的主要措施应为林地凋落物分解创造条件，即因地制宜地对成熟人工林进行间伐或轮伐，当前在该区域造林应避免营造针叶纯林。
Between pure and mixed moso stand by a great deal of experiments , and it puts forward a guidance pattern of classified and rational management , and the implementation of ecological cultivation and ecosystem management as per different types of mixed bamboo stands so as to ensure high and stable yield of mixed bamboo stand , and better circulation of ecological equilibrium 通过大量的试验研究，分析毛竹纯林和竹木混交林的生境差异和经营特点，经营条件，提出怎样根据竹木混交林的类型，分类指导，制定科学的经营方案，实行生态培育和生态系统管理，确保竹木混交林丰产稳产，生态平衡趋向良性循环。
But so far , there have not report about forest soil microbe and soil enzymatic activity in westen sichuan . the study ' s object is bitch forest . spruce forest , fir forest , chrysanthemum alp , willow community and two couch grass , so the research of the soil microorganisma , soil enzymatic activity in the subalpine coniferous forests in western sichuan is significant to china . the result shows that : 1 . in the soil , the relativity of the soil microbial puantity is very prominence , the relation with the quantity of the soil microorganism is that : bacillus > actinomyceto > fungi ; the amount of the microorganism of physiological group sequence ranging from high to low is : aminate > bacteriumazotobacter > denitrify bacterium > nitrobacteria > cellulose decomposing bacteria . under the different vegetable community , the microbial quantity is that : s5 > s7 > s6 > s1 > s2 > s4 > s3 其中，各群落中土壤微生物总数以白桦纯林( s5 )群落最多，每克干土中的含菌量达66 . 13 10 ~ 6个；其次是冷杉针叶林( s7 )群落，每克干土中的含菌量达43 . 41 10 ~ 6个：第三是云杉针叶林( s6 )群落，每克干土中的含菌量达42 . 85 10 ~ 6个；第四是绣线菊-茅草群落( s1 ) ，每克干土中的含菌量达33 . 83 10 ~ 6个；第五是高山柳群落( s2 ) 、茅草( s4 )群落，每克干土中的含菌量分别为33 . 33 10 ~ 6个和33 . 08 10 ~ 6个；第六是茅草群落( s3 ) ，土壤微生物数量最少每克干土中的含菌量仅为23 . 12 10 ~ 6个。
Another feature of chiku s rich natural environment not to be missed is the rare single - species forest of grey mangrove avicennia marina in the mangrove conservation area at the mouth of the chiku creek . the forest is home to thousands of egrets and black - crowned night herons , which live here throughout the year 七股乡丰富的生态资源，当然少不了位于七股溪出海口的红树林保育区，保育区中拥有珍贵的海茄?红树林纯林，以及终年栖息的上万只白鹭鸶与俗称暗光鸟的夜鹭。
Due to different exploitation intensity and ecological restoration measures used in hongchiba region , wuxi county , the vegetation have been formed a series of succession stages , i . e . herbaceous stage scrub - shrub stage - shrub - tree stage - pure larix daempferi conifer forest stage - pinus armandii needle broad - leaved mixed forest stage - natural deciduous broad - leaved forest 巫溪县红池坝地区由于历史上开发强度和生态恢复措施的不同，使当地植被形成了从草本群落灌木灌丛林灌过渡带日本落叶松( larixdaempferi )针叶纯林华山松( pinusarmandii )针阔叶混交林天然阔叶落叶林的一系列生态恢复演替阶段。
Aiming at a series of ecological problems ensured from long - term pursuit for pure stand management of phyllostachys pubescens blindly in fujiang province , such as speedingup destruction of natural broad - leaved forest , serious impact on the implementation of natural forest protection engineering , and daily worsening of moso s damage by pests , snow - fall , icebreak , in - depth analysis is given out to inhabit divergences , operation traits , management conditions 针对福建长期以来盲目推广毛竹纯林而产生的一系列生态问题，特别是加速了天然阔叶林的毁灭，严重阻碍了天保工程的实施，毛竹病虫害，雪压，冰挂危害日趋严重。
