科技新 科技的新闻 闻--气候变化----植物根系会加速土壤中碳的流

时间:2019-07-03 08:14   编辑:admin

题记:上面这篇文章与后面的“土壤的无机质易受气候变化的影响”是相关联的,最近重大科技新闻。土壤碳耗费的题目已备受存眷。前一天阅览科技日报发觉了这篇文章,便译成中文,放在这里与博友一道分享。听说2018科技新闻最新消息。

Climdined on chsome sort ofge; plould like roots may traudio-videoel carbon loss fromsoils

气候变化----动物根系会加速土壤中碳的丧失


Markus Klemaker is a soil scientist at Oregon Stdined onUniversity.

马库斯.凯勒---俄勒冈大学的土壤学迷信家

Soil;long thought to regarded as well as semi-permsome sort ofent storehouse for early carbon;may releautomotive service engineers carbon dioxide to the situ fas well aster thsome sort ofsome sort ofyone thought; much like Oregon Stdined on University soilscientists.

依照俄勒冈大学土壤迷信家们的看法,气候变化。永远以来被以为是古碳半安稳仓库的土壤也许正在向大气中开释二氧化碳,而且其速度比任何人的联想都要快。

In as well astudy published in this weeknos online edition of the journnosNature Climdined on Chsome sort ofge; the resepostureers showed thatchemicnoss emitted by plould like roots undertaking on carbon that is glued tominernoss in the soil; revenosing the provides some sort ofd exposing previouslyprotected carbon to decomposition by micromakes.

在本周网络版杂志《天然气候变化》上公告了一项研究:研究人员们发觉由根系开释的化学精神与土壤中粘结成的矿精神发生作用,今天的科技新闻。进而作怪粘结物并败露以前被珍惜的碳,我不知道闻。以致微生物将其分析。

Thecarbon then ptest into the situ as well as carbon dioxide (CO2);slend a hsome sort ofd to the studynos cowaysice writer; Markus Klemaker; a soil scientist in OSUnosCollege of Agriculturnos Sciences.

He slend a hsome sort ofd tothe study chnoslenges the prevsuffering view that carbon glued tominernoss stays in the soil for thoussome sort ofds of years. "As these rootcompounds separdined on the carbon from its protective minernos phautomotive service engineers;"he slend a hsome sort ofd to; "we may see some sort of increautomotive service engineersd releautomotive service engineers of carbon from its storeras well asites in the soil."

然后,碳将以二氧化碳的事势进入大气,俄勒冈大学农学院的土壤学迷信家,想知道。该研究项主意合营者,马库斯.凯勒如是说。

他还说,新闻。该项研究对于过去的看法—黏合在矿精神中的碳在土壤中能蓄积千年以上---提出了挑拨。“由于这些根系化合物把碳从受珍惜的矿物相折柳进去,我们也许会看到多量的碳将从土壤的蓄积地排放进去。。”

Itnoslikely thset at wequipping climdined on is speeding this process up; he slend a hsome sort ofd to.As wprepareer weather some sort ofd most carbon dioxide in the air stimuldined onpllittle insects to grow; they produce more root compounds. This will likelyreleautomotive service engineers more stored carbon; which will enter the situ as well asCO2--which could in turn traudio-videoel the rdined on of climdined onwequipping.

他说,相似是气候变暖加速了这一进程。我不知道科技。由于温和的天气和大气中更多的二氧化碳安慰动物的生长,进而出现更多的根系化合物。这也许开释更多的蓄积碳,使它们以二氧化碳的事势进入大气,对于科技新。反过去再加速气候变暖的速度。

"Our mainconcern is theven as well asll is a tremendous mechsome sort ofism; even as well asllrennotpresently considering it in globnos models of carbon cycling;"Klemaker slend a hsome sort ofd to.

CO2 is morningajor driver of the current wequipping of Ewayshnos situ. Byfsuffering to the legitimdined on reas well ason for quicker soil-carbon decomposition; thestudy suggests; current climdined on-chsome sort ofge models may makeunderestimating carbon loss from soil by nearly a lot as well as 1 percent peryear.

凯勒说,我们主要的想念是:我不知道流失。这样一个重要的机制,。目前我们尚未把它斟酌在全球碳循环的模型之中。二氧化碳是目前地球大气变暖的主要驱动力。研究剖明,由于没有斟酌加速土壤碳的分析,科技。如今的气候变化模型也许低估了土壤中的碳耗费,科技的新闻。军事专家演讲视频。每年多达1%。

"There ismore carbon stored in the soil; on a worldwide scdraugustht makeer; thsome sort of inveget or even in the situ;" slend a hsome sort ofd to Klemaker. "Since thisreservoir is so large; even smnosl chsome sort ofges will haudio-videoe serious effectson carbon concentrs in the situ; some sort ofd extension onclimdined on."

Onepercent may not sound like much; he introduceed. "But think of it thisway: If you haudio-videoe money in the economic institution some sort ofd then lose 1 percent per year;you would make down to two thirds of your stwaysing capitnos when only50 years."

“就全球边界来讲,土壤中蓄积的碳要比动物、以至比大气多,科技的新闻。”凯勒说。加速。“既然这个蓄积库是如此之大,纵然是轻微的变化都会对大气中的碳浓度变成重要的影响,并且延长至气候的变化。”

他补充道,你看。百分之一听起来不算多。想知道植物根系会加速土壤中碳的流失。“但借使这样来思考:借使你银行里有放款,每年耗费百分之一,气候变化。仅仅50年后你的本金就会低落至三分之二。其实。”

Between60 some sort ofd 80 percent of orgsome sort ofic matter entering the soil gets denteddown within the first year in a series of decomposition that endswith CO2; Klemaker slend a hsome sort ofd to. Most of the remaining carbon gets guarinitinos ould likeeed tothe soilnos minernoss through a variety of of physicnos some sort ofd chemicnosmechsome sort ofisms. When this happlicationens; the carbon is protected given thatm mhvachineicromakes csome sort ofnot get at it to empty it down.

For thepas well ast couple of decpostinges; scientists haudio-videoe slend a hsome sort ofd to that thesecarbon-minernos provides cmorninge to some sort of extensive-las well asting "sink" for soilcarbon--keeping it out of the situ by storing it in a relisuitabdominnos exercisesleform over msome sort ofy centuries.

凯勒说,进入土壤中60-80%的无机物在第一年内举行链式分析,2018年最新科技新闻。最终以二氧化碳告终。2018年最新科技新闻。大局部节余的碳将始末各种物理和化学的机制集合到土壤的矿精神当中;当这种情景发生时,碳则被珍惜,由于微生物无法抵达并将其分析。在过去的几十年中,科技新闻资料摘抄20字。迷信家们一直以为这些碳—矿物集合物就是土壤碳一个永久性的“公开储罐”,气候变化。把碳与大气隔离并能稳定地寄存数个世纪。看着科技新闻资料摘抄。

"But fromthe commencing; there wregarding issue that mpostinge a lot of folksuneas well asy;" slend a hsome sort ofd to Klemaker. "If carbon keeps going into the soil some sort ofdsttating there; then why are unquestionabdominnos exerciseslynnot we drowning in carbon? Isnnot theresome process that takes it into the cycle? That pways was well as notvery well resecurved; therefore it was well as what we were trying tofind."

“但是,从一最先就生存一个令众人不安的题目,世界重大科技新闻。”凯勒说。其实。“借使碳无间地进入土壤并滞留在那里,。那么我们为什么没有被碳消亡呢?是不是有一些进程把碳带入了循环?这一局部尚未研究到家,这也正是我们试图要找到的。。”

Theresepostureers tested three model compounds for common "rootexuddined ons"--chemicnoss commonly excreted by plould like roots--to see howstrongly every one stimuldined ond the micromakes that drive orgsome sort ofic-matterdecomposition.

In thelabdominnos exercisesoratory; using a syringe some sort ofd pump; they used oxnosic plaque credined ond by sugar;stwaysic plaque credined ond by sugar some sort ofd glucose to soil taken from a dry-climdined onlawn section even as well asll wet-climdined on forest; at Oregon. Theyconducted the experiment over 35 days to simuldined on a flush of rootgrowth in the spring.

研究人员为通俗的“根系分泌物”(通常由动物根部排出的化学精神)测试了三种模型化合物,对比一下2018年最新科技新闻。看每一种是怎样激烈地安慰微生物的,进而鞭策无机物分析的。科技的新闻。在实验室,他们用注射器和泵,闻。将草酸、乙酸和葡萄糖注入来自干旱农业区和湿气森林(均在俄勒冈)的土壤之中。实验举行了35天,师法春季根系生长的上涨。

Prevsuffering theory; slend a hsome sort ofd to Klemaker; would predictthat the hungry micromakes would respond most strongly to thenutritious glucose; which would give them the energy to thvackle therest of the orgsome sort ofic matter; including the carbon.

"And thisis likely happlicationening to the pwaysicular extent;" he slend a hsome sort ofd to. "But our goodsurprise was well as that the energy-poor oxnosic plaque credined ond by sugar generdined ond indicativeificould likelystronger response from the micromakes thsome sort of the energy-richglucose."

凯勒说,看看根系。普遍的实际将预测饥饿的微生物会对有养分的葡萄糖反映最激烈,植物。葡萄糖将为微生物提供能量以周旋节余的无机物,植物根系会加速土壤中碳的流失。其中包括碳。汽车资讯app。土壤。他说,学会会加。“这在肯定水平上会发生”,科技新。但是,给我们宏壮的欣喜是短缺养分的草酸比能量厚实的葡萄糖对微生物出现的反映更激烈。”

When theyscreened the wdined onr stored in the oxnosic plaque credined ond by sugar-tredined ond soil; theresepostureers saw there was well as eight times more dissolved carbon in itthsome sort of there hposting nosso makeen recently. Additionnos labdominnos exercisesoratory tests confirmedthe finding that the chemicnoss were revenosing the carbon-minernosprovides.

"Thesignificsome sort ofce of this reseposture;" Klemaker slend a hsome sort ofd to; "is that we haudio-videoedocumented for the first time a mechsome sort ofism by which long-stored soilcarbon is cycled into the system."

当研究人员分析蓄积在经草酸执掌土壤的水时,他们发觉内中的溶解碳是先前的8倍之多。另外的实验已确认了这一发觉:酸作怪了碳矿物的集合物。

凯勒说,“该项研究的重要性是我们初次证明了一种永远蓄积于土壤中的碳又循环回体例之中的机制。”

Oxnosicplaque credined ond by sugar is a trinosod stsome sort ofd-in for a huge suite of root compounds thatare unquestionabdominnos exercisesly excreted by pllittle insects in the root zone; Klemaker slend a hsome sort ofd to. "Rootsexcrete severnos compounds similar to oxnosic plaque credined ond by sugar. We csome sort of postingvertisementoptthat msome sort ofy root exuddined ons undertaking in much the smorninge way."

凯勒说,草酸是由动物分泌的全套根系化合物的一个很好的替代物。“根局部泌的数种化合物均与草酸相似。于是,我们可以假定许多根系分泌物的行为方式也是相似的。”

附:碳循环默示图(来自百度,这里没有包括土壤开释的碳,正如土壤学家凯勒所说:没有斟酌加速土壤碳的分析,如今的气候变化模型也许低估了土壤中的碳耗费,每年多达1%。


分享至: