施用有机垃圾肥料后林地蚯蚓数量变化跟踪调查

为研究施用有机垃圾肥料对林地土壤动物蚯蚓的影响,对上海郊区3个基地施用不同量有机垃圾肥料的林地中蚯蚓的数量和组成进行了调查。研究发现,赤子爱胜蚓(Eisenia fetida)和腔蚓(Metaphire sp.)两种蚯蚓数量比约为1.78:1。在老港和金山基地中,蚯蚓的数量随着撒施有机垃圾肥料量的增加而增加,而在沟施的操作下蚯蚓数量的变化起伏较大,这一变化与有机垃圾肥料在林地沟施不均匀密切相关。施用有机垃圾肥料后,蚯蚓数量的增加会导致生态系统地下部分物质和能量循环产生变化; 在蚯蚓活动和取食过程中,通过其对有机物质的分解转化,会促进氮、磷循环,从而给林地生态系统带来较多的有利影响。

Investigation of quantitive change of earthworms after application of manure from organic waste in forest land

The influence of the application of manure of organic waste in forest land on the quantity of earthworms was studied in the paper. Based on the survey in the forest applied with different amounts of manure of organic waste, earthworms Eisenia fetida and Metaphire sp. were found, and the number ratio of them was about 1.78:1. The number of earthworms was closely related to the amount of manure of organic waste applied in the forest. For example, the number of earthworms and the amount of manure spreading in the forest was positively correlated in Laogang and Jinshan sites. However, under the application of groove fertilization for manure, the correlation between the amount of manure and earthworms was not clear, resulting possibly from the uneven distribution of the manure. When applied with manure of organic waste, the increased amount of earthworms will accelerate the decomposition of organics and thus promote carbon and phosphor recycling in the underground environment, which is beneficial for the forest ecosystem.