نتایج جستجو برای: co2 ha

تعداد نتایج: 129490  

Journal: :Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) 2023

Hutan mangrove merupakan hutan yang mampu menyimpan karbon dan menyerap karbondioksida dengan kemampuan terbaik dibandingkan hutan-hutan lain. Penelitian ini bertujuan untuk menganalisis kondisi serta estimasi cadangan serapan tegakan pohon pancang di Gunung Anyar. Data utama butuhkan dalam penelitian adalah jumlah individu biomassa mangrove. Metode dipakai metode survey. penentuan lokasi tekni...

Journal: :Frontiers in soil science 2022

Introduction There is a vast data gap for the national and regional greenhouse gas (GHG) budget from different smallholder land utilization types in Kenya sub-Saharan Africa (SSA) at large. Quantifying soil GHG, i.e., methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O) emissions types, essential filling gap. Methods We quantified GHG Western Kenya. conducted 26-soil sampling campaign types...

2014
Jianzhong Cheng Xinqing Lee Benny K.G. Theng Bin Fang Fang Yang

Spatial variability is a major source of uncertainty in estimating the fluxes of greenhouse gases between steppe and atmosphere. The fluxes of CO2, CH4, and N2O were carried out between 08:00 and 10:00 h. of the following day during the midsummer period from a transect (area: 5.25×10 ha) in the semiarid steppe of northern China, using the dark static chamber technique and gas chromatography. Tw...

Journal: :بوم شناسی کشاورزی 0
سلماز رضوی دربار امیر لکزیان اکرم حلاج نیا غلامحسین حق نیا

incorporation of plant residue in soils is considered as an important agricultural practice for maintaining soil fertility in sustainable agricultural system. co2 levels, nitrogen fertilization and plant residues are factors which highly affect decomposition of added organic matter to soil. in this research controlled chambers were used to investigate the effects of elevated atmospheric co2 con...

1999
S. A. Billings D. D. Richter J. Yarie

Because a large fraction of the world’s carbon exists in the soil of boreal forests, understanding how soil temperature and moisture affect soil respiration is vital for predicting soil response to climate change. We measured soil respiration and CO2 concentrations within soils of floodplain and upland forests in interior Alaska from 1996 to 1997. At each site, a 0.10-ha-area shelter was constr...

Journal: :Chemical communications 2008
Hong-Peng Jia Wei Li Zhan-Feng Ju Jie Zhang

Two isostructural 1D compounds {[M3(hpdc)2(H2O)6] 2H2O}n (M = Mn, Co; H3hpde = 2-hydroxypyrimidine-4,6-dicarboxylic acid) were synthesized by the in situ hydrothermal reactions of 2-chloropyrimidine-4,6-dicarboxylic acid with MCl2 (M = Mn, Co) and NaOH; the MnII compound shows spin-canted antiferromagnetism, whereas the CoII compound exhibits the coexistence of spin-canting and a two-step field...

2011
M. V. Thomas Y. Malhi K. M. Fenn J. B. Fisher M. D. Morecroft C. R. Lloyd M. E. Taylor D. D. McNeil

We present results from a study of canopyatmosphere fluxes of carbon dioxide from 2007 to 2009 above a site in Wytham Woods, an ancient temperate broadleaved deciduous forest in southern England. Gapfilled net ecosystem exchange (NEE) data were partitioned into gross primary productivity (GPP) and ecosystem respiration (Re) and analysed on daily, monthly and annual timescales. Over the continuo...

Journal: :international journal of advanced biological and biomedical research 2013
ashkan nabavi-pelesaraei ahmad sadeghzadeh mir hossein payman hassan ghasemi mobtaker

the objectives of this research were to investigate influences of energy inputs and energy forms on output levels and evaluation of co2 emissions for hazelnut production in guilan province of iran. moreover, the sensitivity analysis was done by marginal physical productivity (mpp) method for energy inputs and energy using linear regression. initial data were collected from 120 orchardists in se...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم پایه 1388

ویروس آنفلوانزا متعلق به خانواده اورتومیکسوویروس¬ها بوده و از سه نوعa ، b و cتشکیل شده است. ویروس آنفلوانزای گونه¬ی aو b حاوی دو گلیکوپروتئین سطحی به نام¬های هماگلوتینین (ha) و نورامینیداز (na) می¬باشد. ha از یک قسمت کروی به نام سر و یک قسمت میله ای به نام ساقه تشکیل شده است و یک گلیکوپروتئین هموتریمر شامل دو ساب یونیت به نام¬های ha1 و ha2 است. ha آنتی¬ژن اصلی در سطح پوشش ویروس می¬باشد. بیشتر ع...

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