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浏览/检索结果: 共4条，第1-4条 帮助 限定条件 内容类型：学位论文     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 基于高分辨质谱的土壤溶解性有机质化学多样性研究 学位论文 北京: 中国科学院生态环境研究中心, 2018 作者:  李晓明 收藏  |  浏览/下载：24/0  |  提交时间：2020/07/15 土壤溶解性有机质， 化学多样性，微生物多样性， 傅立叶变换离子回旋 共振质谱  decreased WIth IncreasIng Iron ComplexIng Index. PAtterns In Molecular PrOfiles IndicAted Dom In Paddy Soils To Become More RecalcItrAnt At Higher Soil C/n rAtio And Higher Soil Ph. furTherMore, PlAnt-derived polyPh.nols And Pyrogenic Dom Were retaIned Favorably By Iron And The ChemodiversIty Of Dom In Paddy Soil Increased WIth IncreasIng Soil C/n rAtios. These Results Provide Novel InFormAtion regardIng Dom Characteristics At a Molecular Level And Will InForm Better Global MAnagement Of Soil Carbon In Paddy Soil EcosysteMs Global. 2) Through The applicAtion Of Ft-icr-Ms, The ChemodiversIty Of Dom In Soil Subjected To Long-term OrgAnic Carbon And InOrgAnic Fertilizer Amendments Was Established. In Parallel, Bcc Was Assessed. Through This Coupled Approach It Was Established.thAt sustaIned OrgAnic Carbon Amendment Resulted In: SignificAntly (p < 0.05) Increased Total Carbon And Total nItrogen Reservoirs In Soil, Dom PrOfiles Of greAter ChemodiversIty, And Emergence Of RecalcItrAnt Dom Moieties (H/c < 1.5). In Contrast, Carbon And nItrogen Reservoirs In Soil Subjected To sustaIned InOrgAnic Fertilizer applicAtion Were Unaltered, While Soil OrgAnic Carbon ChemodiversIty Was Observed To Shift To Less RecalcItrAnt Dom Moieties (H/c rAtio > 1.5 And O/c rAtios < 0.5). furTherMore, sustaIned OrgAnic Carbon Amendment Shaped Bcc To a eutroPh.c stAte While Long-term Chemical fertilizAtion Directed The Bcc Towards An oligotroPh.c stAte. Higher connectivIty And Network complexIty Were Observed In OrgAnic Carbon Amended Soils. Dom-Bcc Network Analysis, IndicAtIng thAt Soil Microbes Had More Interaction WIth Dom Molecules followIng sustaIned OrgAnic mAtter Input. These Results Highlight The Potential For OrgAnic Carbon Amendments To Not Only Build Soil Carbon sTocks And Increase Their Resilience, But To Also Improve The Functional stAte Of Soil Microbial communIties. Key Words: Dom, ChemodiversIty, Microbial diversIty, Ft-icr Ms   土壤动物对紫色土土壤质量变化的响应 学位论文 博士, 北京: 中国科学院研究生院, 2010 朱新玉 收藏  |  浏览/下载：55/0  |  提交时间：2013/02/21 土壤质量  指示者  土壤动物  农田  施肥方式   东北典型黑土区农业资源可持续利用研究 ──以黑龙江海伦市为例 学位论文 博士, 北京: 中国科学院研究生院, 2009 马岩 收藏  |  浏览/下载：44/0  |  提交时间：2010/06/07 农业  生产潜力  资源利用效率  系统分析  综合评价  途径  对策  海伦地区 agriculture  production potential  resources use efficiency  systematic analysis  comprehensive evaluation  approach  counter-measures  Hailun County   生态平衡施肥模型在冬小麦／夏玉米轮作中的应用 学位论文 博士, 北京: 中国科学院研究生院, 2004 王新民 收藏  |  浏览/下载：42/0  |  提交时间：2011/12/15 冬小麦／夏玉米：生态平衡施肥模型：相关系数：经济效益：推荐施肥吊