草业学报2018，Vol.27Issue(2)：206-212,7.DOI:10.11686/cyxb2017141
降水格局对科尔沁沙地三种草本植物凋落物分解的影响
Effect of precipitation patterns on litter decomposition in three annual herb species in the Horqin Sandy Land
摘要
Abstract
The effect of precipitation patterns on both aboveground and belowground litter decomposition in three annual herb species in the Horqin Sandy Land was investigated by the litter-bag method.Precipitation patterns,which were designed according to historical precipitation characteristics,included high-,medium-,and low-frequency precipitation,hut the total amount was the same in each treatment.The results showed that precipitation patterns and depth of litter burial were the two main factors affecting the litter decomposition rate.The aboveground litter decomposition rate was significantly slower than the belowground litter decomposition rate.The belowground litter decomposition rate was faster at deeper depths than at shallower depths,especially for Setaria viridis.The decomposition rate of S.viridis litter belowground was significantly (P＜ 0.01) faster at the 10-20 cm depth than at the 0-10 cm depth.The aboveground litter decomposition rate was significantly (P＜0.01) slower under the low-frequency precipitation pattern than under the other precipitation patterns.There was a significant interaction between precipitation pattern and litter burial depth for litter decomposition.The influence of precipitation pattern on litter decomposition decreased with increasing depth.The litter decomposition rate differed among the three plant species.The belowground litter decomposition rate for both S.viridis and Artemisia sacrorum significantly differed among precipitation patterns at the 0 -10 cm burial depth,while the aboveground litter decomposition rate differed significantly (F=48.42,P＜ 0.001) among precipitation patterns only for Chenopodium acuminatum.关键词
降水格局/凋落物/分解率/科尔沁沙地Key words
precipitation pattern/plant litter/decomposition rate/Horqin Sandy Land引用本文复制引用
罗永清,岳祥飞,李玉强,赵学勇,丁杰萍,闫志强..降水格局对科尔沁沙地三种草本植物凋落物分解的影响[J].草业学报,2018,27(2):206-212,7.基金项目
国家自然基金项目(31500369),中国科学院“百人计划”项目(Y551821001),国家科技基础资源调查专项(2017FY100200),国家重点研发计划课题(2016YFC0500907,2017YFA0604803)和西北院青年人才基金(Y651K21001)资助. （31500369）
