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。
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。