不同处理条件对青海云杉枯落物分解速率的影响

Effects of different treatment conditions on the decomposition rate of Picea crassifolia litter

为掌握快速分解青海云杉枯落物的方法,本文以青海东部山区人工林青海云杉枯落物为研究对象,在室内开展枯落物分解试验,以筛选出有利于青海云杉枯落物分解的条件。结果表明:(1)温度和湿度是影响青海云杉枯落物分解的重要主导环境因子。(2)混合施用菌剂对青海云杉枯落物的分解有更好的促进作用。(3)在11个试验组中,62A试验组对青海云杉枯落物分解的效果最好,枯落物分解50%需要0.72 a,分解95%需要2.82 a。研究结果可为维持和提高青海云杉林地的土壤肥力提供新途径,为青海云杉森林资源的保护和可持续利用提供一定的理论依据。

Picea crassifolia litter in the eastern mountainous area of Qinghai is taken as research object to explore a method for its rapid decomposition.Indoor litter decomposition test is carried out to screen out the conditions conducive to the decomposition of Picea crassifolia litter.The results are as follows:(1)Temperature and humidity are important dominant environmental factors affecting litter decomposition Picea crassifolia.(2)The mixed application of microbial agents has a better promoting effect on the litter decomposition process.(3)Among the 11 experimental groups,62A experimental group shows the best effect on the decomposition rate of Picea crassifolia litter,with 0.72 a required for 50%decomposition and 2.82 a required for 95%decomposition.The research results can provide a new approach for maintaining and improving soil fertility in Picea crassifolia forest,and provide theoretical basis for the protection and sustainable utilization of Picea crassifolia forest resources.