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di si jiang fu shi sheng wu sheng tai gong cheng
Author(s): 
Pages: 55-59
Year: Issue:  2
Journal: Rural Eco-Environment

Keyword:  生物生态工程泥煤有机废物四讲生态系统蚯蚓微生物工程蘑菇综合农业饲料;
Abstract: <正> 第一节 腐食生物群落生态工程 以死生物为营养的生物,如真菌、细菌和土壤动物等,所构成的腐生食物链,在天然生态系统中占有非常重要的地位。在天然森林生态系统中,99%的能量流都进入了腐食链的通道;在天然草原生态系统中,75%左右的能量流进入了腐食链的通道。而人类的农耕和放牧几乎在所有场合下都降低了能量流经
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