The relationships of soil respiration with vegetation type and soil microbial biomass as well as the spatial heterogeneity of soil respiration are the hotspots in recent researches .

森林土壤呼吸与 植被、微生物生物量的关系，以及土壤 呼吸的空间变异规律已成为近年来的研究热点。

The problems of respiration valve are mainly insufficient ability of anti-frozen improper material selected narrow air path and bad maintenance showing that gravity type of respiration valve or all weather respiration valve newly developed should be selected .

呼吸阀的主要问题是不具备防冻功能、材料选择不当、空气通道狭窄、维护保养不够。指出应选择重力 式阀盘 呼吸阀或新问世的全天候呼吸阀。