Arid
项目编号41461105
绿洲农田生态系统生态化学计量特征及其对养分限制的指示
贡璐
主持机构新疆大学
开始日期2015
结束日期2018
资助经费520000(CNY)
项目类别地区科学基金项目
资助机构CN-NSFC(国家自然科学基金)
语种中文
国家中国
英文简介Ecological stoichiometry, which balances multiple elements and integrates different scales from individuals to ecosystems, has greatly advanced our understanding of ecological. The ecological stoichiometric properties of carbon (C), nitrogen (N) and phosphorus (P) are the important performances of ecosystem process and function, and are powerful indicators of diverse ecological processes. Studies on ecological stoichiometric properties and theirs driving mechanism become one of hot topics of biogeochemical cycle and global change.Taking the farmland ecosystem of Aksu oasis of the upper reaches of Tarim River as test object, this reseach will reveal ecological stoichiometric properties of typical crops (wheat, maize and cotton)and soil. The different organs (leaf, stem, root and fruit) of typical crops and soil samples will be collected at different growth stage, and C, N and P contents and C:N:P stoichiometry will be monitored. Based on the pot and field experiments in with N and P fertilizer additions, the homeostasis of typical crops will be indicated by exponent (reciprocal of the regulation coefficient) of the power function of crop nutrient against soil nutrient concentrations.. We will analyze influence of environment (other soil physical, chemical and biological factors, and groundwater) and human activity (cropping and fertilizing) to the ecological stoichiometric properties. The relationship with growth rate of crops and C, N and P will be discussed with fertilizer additions,and the growth rate hypothesis (GRH) will be tested. We will determine the limited nutrient and its criterion, which will be used to assess the advantages or disadvantages of current fertilizers system, and pursue fertilizer treatments suitable for crops. This study attempts to reveal ecological stoichiometric properties of oasis agroecosystem and theirs driving mechanism in oasis, utilized ecological stoichiometric properties to considering limited nutrient, and can be beneficial for adding research fields of land ecological stoichiometry. Our findings can offer reference for future field studies on ecological stoichiometry in arid land. Scientific basis are provided for deepening reasearch on strategies of nurient utilization of crops, supporting the optimized management of oasis farmland ecosystem, stabilizing and improving of ecological security of agriculture.
来源机构新疆大学
资源类型项目
条目标识符http://119.78.100.177/qdio/handle/2XILL650/344339
推荐引用方式
GB/T 7714
贡璐.绿洲农田生态系统生态化学计量特征及其对养分限制的指示.2015.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[贡璐]的文章
百度学术
百度学术中相似的文章
[贡璐]的文章
必应学术
必应学术中相似的文章
[贡璐]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。