公告日期 : 2014-07-09
Nutrient Release during Single and Mixed Leaf Litter Decomposition from Larix principis-rupprechtii and Other Tree Species on the Loess Plateau, China
Authors：Zhang XX, Liu ZW, Bing YH, Zhu BC, Du LZ, Zhu ZH, Luc NT.
Key words：the Loess Plateau, Larix principis-rupprechtii, leaf litter decomposition, nutrient release.
Current-year leaf litter from Larix principis-rupprechtii and 10 other tree species planned for a mixed forest was collected on the Loess Plateau of China and placed in nylon mesh litterbags singly or mixed according to set ratios and then buried in humus soil from a tree-free waste grassland for a 345-d incubation under constant temperature (20~25℃) and humidity (50% of the field water capacity). Results showed that during decomposition, macro-elements were generally more easily released than micro-elements. Release rates of most elements had no significant relationships with their own initial contents in the litter except for C and N, for which C had a negative correlation and N had a positive correlation. According to the comprehensive impacts of all 10 elements released during mixed litter decomposition with L. principis-rupprechtii, Ulmus pumila and Pinus tabulaeformis obviously accelerated nutrient release, followed by Betula platyphylla; Platycladus orientalis and Robinia pseudoacacia obviously inhibited nutrient release, followed by Populus simonii. In conclusion, those tree species that accelerate nutrient release during mixed litter