文献类型：期刊文献

中文题名：陈山红心杉根际土壤有机碳、氮含量及根际效应

英文题名：Contents of soil organic carbon and nitrogen forms in rhizosphere soil of Cunninghamia lanceolata and the rhizopshere effect

作者：刘顺[1,2] 盛可银[2] 刘喜帅[2] 吴珍花[2] 郭晓敏[2,3] 肖复明[4] 张文元[2,3]

第一作者：刘顺

机构：[1]中国林业科学研究院森林生态环境与保护研究所国家林业局森林生态环境重点实验室;[2]江西农业大学林学院江西省森林培育重点实验室;[3]江西特色林木资源培育与利用2011协同创新中心;[4]江西省林业科学院

年份：2017

卷号：36

期号：7

起止页码：1957-1964

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：国家"十三五"重点研发计划项目(2016YFD0600303-01);江西省林业科技创新项目(201404);国家自然科学基金项目(31560204)资助

语种：中文

中文关键词：陈山红心杉;根际效应;有机碳;氮形态

外文关键词：Chenshan red fir （Cunninghamia lanceolata） ; rhizosphere effect; soil organic car-bon （SOC） ; nitrogen form.

分类号：S153.621

摘要：陈山红心杉(Cunninghania lanceolata)是江西特有树种,获国家地理标志保护。目前关于其植物—土壤关系的研究较少。以不同林龄(5、10、20和40a)陈山红心杉为对象,研究了其根际和非根际土壤有机碳、氮含量和根际效应。结果表明:根际pH略小于非根际,有机碳和氮素总体上大于非根际。随林龄的增加,根际和非根际土壤有机碳和氮含量先降后增;有机碳、全氮和有机氮的根际效应先增后降;铵态氮、硝态氮和无机氮的根际效应先降后趋于平缓;pH和碱解氮的根际效应变化平缓。氮含量对根际和非根际土壤pH和有机碳的影响为全氮>无机氮>碱解氮;碱解氮和全氮的根际效应分别对pH和有机碳根际效应影响最大。随着林龄的增加,硝态氮的比重高于铵态氮,应注意反硝化作用可能造成的氮素流失,同时林地土壤养分下降,在10 a前后应注意林地有机质和氮素的补充,以防地力衰退。
Chenshan red fir （Cunninghamia lanceolata） is an endemic tree species in Jiangxi Province granted with national geographical protection status, but the relationship between plants and soils were not well understood. In the current study, different tree ages （5, 10, 20 and 40 years） of C. lanceolata were selected to examine the contents of soil organic carbon （SOC） and different nitrogen forms in the rhizosphere and nonrhizosphere soils and their relationships. The results showed that the pH value of rhizosphere soil was slightly lower than that of nonrhizosphere soil, while SOC and nitrogen contents were higher. SOC and nitrogen contents of rhizosphere and nonrhizosphere soil decreased initially with the increasing plantation age, but increased thereafter. The rhizosphere effects of SOC, total N and organic N increased initially with plantation age and then decreased, but that of nitrate and ammonium firstly increased and then kept relatively stable. The rhizosphere effects on pH and alkaline hydrolysis N experienced little change. The rhizosphere effects of different N forms on soil pH and SOC were in order of total N〉inorganic N〉alkaline hydrolysis N. In terms of the rhizosphere effect, the influences of alkaline hydrolysis N and total N on pH and SOC were the greatest. The proportion of nitrate increased with the plantation age compared with that of ammonium. More attentions should be paid to the N loss caused by soil denitrification and subsequent soil nutrient decline. At age about 10 years, forest soil organic matter and N pools should be replenished so as to prevent the soil fertility decline.