检索结果-南通市图书馆

Synergistic Effects of Biochar and NPK Fertilizer on Soybean Yield in an Alkaline Soil

Pedosphere 2015年第5期25卷 713-719页

作者： Fatima Z.METE Shamim MIA feike a.dijkstra Md.ABUYUSUF A.S.M.Iqbal HOSSAIN Department of Agronomy Patuakhali Science and Technology University Department of Environmental Science The University of Sydney

Biochar effects on legume growth and biological nitrogen fixation have been studied extensively, mostly in acidic soils with laboratory produced biochar. In the present study, a pot experiment in a full factorial experimental design was performed to examine soybean yield and nodulation of three genotypes grown with or without biochar and NPK fertilizers in an alkaline soil. We observed synergistic effects of biochar and NPK fertilizer applications on biomass and seed yields for all three soybean genotypes. Total biomass production and seed yield increased on average by 67% and 54%, respectively, with biochar and by 201% and 182% with NPK fertilizer application compared to the control. When applications of biochar and NPK fertilizer were combined, the increases were 391% and367%, respectively. However, the biomass production in the control was very low(692 kg ha-1) due to a high soil p H(8.80). The nodulation increased with biochar and NPK fertilizer applications, and was largest with the combined application. A correlation was found between leaf chlorophyll content(single photon avalanche diode value) and nodule number. We suggested that the synergistic increase in yield was due to a decrease in soil p H caused by biochar and NPK fertilizer applications thereby increasing P availability in this alkaline soil.

关键词：氮磷钾复合肥大豆产量碱性土壤生物炭增效作用叶片叶绿素含量土壤pH值肥料组合

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Opposite effects of nitrogen fertilization and plastic film mulching on crop N and P stoichiometry in a temperate agroecosystem

引用

Journal of Plant Ecology 2019年第4期12卷 682-692页

作者： Fan Ding Shuangyi Li Xiao-Tao Lü feike a.dijkstra Sean Schaeffer Tingting An Jiubo Pei Liangjie Sun Jingkuan Wang College of Land and Environment Shenyang Agricultural UniversityShenyang 110086China Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016China Sydney Institute of Agriculture School of Life and Environmental SciencesThe University of SydneyEveleighNSW 2015Australia Department of Biosystems Engineering and Soil Science University of TennesseeKnoxvilleTN 37996USA

Aims Crop nitrogen(N)and phosphorus(P)stoichiometry can influence food nutritive quality and many ecosystem ***,how and why N and P stoichiometry respond to long-term agricul-tural management practices(e.g.N fertilization and film mulching)are not clearly *** We collected maize tissues(leaf,stem,root and seed)and soil sam-ples from a temperate cropland under 30-year continuous N fer-tilization and plastic film mulching treatments,measured their C,N and P concentrations(the proportion(%)relative to the sample mass),and used structural equation models to uncover the re-sponding mechanisms for crop N and P contents(the total amount(g/m2)in crop biomass).Important Findings Long-term N fertilization increased N concentrations in all crop tissues but sharply decreased P concentrations in vegetative tis-sues(leaf,stem and root),thereby reducing their C/N ratio and increasing C/P and N/P *** drop in P concentration in vegetative tissues was due to the dilution effect by biomass in-crement and the priority of P supply for seed *** con-trast,film mulching decreased N concentration but increased P concentrations in most crop tissues,thereby increasing C/N ratio and reducing C/P and N/P *** mulching increased crop P content by increasing soil temperature and moisture;whereas,mulching showed little effect on crop N content,because a posi-tive effects of soil temperature may have canceled out a negative effect by soil *** indicated a decoupling of P and N uptake by crops under film *** conclusion,N fertiliza-tion and plastic film mulching showed opposite effects of on crop N and P stoichiometry.

关键词： long-term soil stoichiometry soil moisture dilution effect maize tissues

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Theoretical Proof and Empirical Confirmation of a Continuous Labeling Method Using Naturally ^13C-Depleted Carbon Dioxide

引用

Journal of Integrative Plant Biology 2007年第3期49卷 401-407页

作者： Weixin Cheng feike A. dijkstra Environmental Studies University of California Santa Cruz CA 95064 USA

Continuous Isotope labeling and tracing is often needed to study the transformation, movement, and allocation of carbon in plant-soil systems. However, existing labeling methods have numerous limitations. The present study Introduces a new continuous labeling method using naturally ^13C-depleted CO2. We theoretically proved that a stable level of ^13C-CO2 abundance in a labeling chamber can be maintained by controlling the rate of CO2-free air Injection and the rate of ambient airflow with coupling of automatic control of CO2 concentration using a CO2 analyzer. The theoretical results were tested and confirmed in a 54 day experiment in a plant growth chamber. This new continuous labeling method avoids the use of radioactive ^14C or expensive ^13C-enrlched CO2 required by existing methods and therefore eliminates issues of radiation safety or unaffordable isotope cost, as well as creating new opportunities for short- or long-term labeling experiments under a controlled environment.

关键词： carbon flux CO2 isotope rhizosphere tracers

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：