期刊论文

中文

林业科学

1001-7488

2005

41

6

1-6

10.3321/j.issn:1001-7488.2005.06.001

(2000-076):国家野外台站科研项目 (2001-07):林业部科研项目 (2004-527):教育部留学基金 :湖南省高校青年骨干教师培养基金

本校为第一机构

通过外加氮源或将杉木针叶与林下植物叶混合来改变杉木林凋落物中针叶的养分状况,与杉木林针叶凋落物分解进行比较,分析针叶养分状况及其对杉木林凋落物分解速率和养分释放的影响.结果表明:将杉木针叶与林下植物叶混合和外加氮源均对凋落物分解有不同程度的促进作用.经过153 d的分解后,未经处理的杉木针叶干质量损失率为20.49%,与林下植物叶混合的凋落物干质量损失率为43.67%,其促进作用最大;外加4 gNaNO3的促进作用次之,凋落物干质量损失率为42.07%;外加2 g NaNO3的凋落物干质量损失率为29.13%.对分解过程中各试验方案的凋落物干质量保留率进行方差分析,在开始的62 d内,与林下植被叶混合的杉木...

Four treatments of Chinese Fir needle litter, Chinese Fir needle litter with addition of 2 g and 4 g NaNO3 respestively, and Chinese Fir needle litter mixed with leaves from understorey plants were designed to investigate the effects of nutrient Status on the decomposition rates and nutrient releases of Chinese Fir needle litter using the litter bag technique. The results showed that both adding NO3^--N and mixing with leaves from understorey plants to some extent accelerated the decomposition rate of Chinese Fir needle. The dry mass loss perce...