什么是植物完全分解后残留吗?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 10 - t05:55:33z //www.hoelymoley.com/feeds/question/9322 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/9322 8 什么是植物完全分解后残留吗? 角嘴海雀 //www.hoelymoley.com/users/5375 2016 - 12 - 20 - t19:21:05z 2016 - 12 - 21 - t20:13:36z < p >分解植物的典型部分,离开表面上而不是埋,不是以气态的形式发布?< / p > < p >我的简单的世界观是植物结构都来自空气,水分含量在地面和一些营养物质,所以我想知道分解的过程中只剩下一个小比例的营养或者一些更大一部分剩下的固体材料。< / p > < p >我想在< em >发布这个的可持续性。stackexchange < / em >虽然我寻找一个合理的解释,而不是实际经验。< / p > < p >最后,我欣赏答案可能会根据不同类型的植物。如果它能帮助我想英国,和落叶的混合物(山毛榉,淡褐色,橡木),紫杉,云杉和其他草本植物和灌木。< / p > < p >显然我知道时间表适用于木质的茎和分支将远远超过萌芽和树叶。< / p > //www.hoelymoley.com/questions/9322/-/9328 # 9328 6 kingledion回答的是什么植物完全分解后残留吗? kingledion //www.hoelymoley.com/users/6703 2016 - 12 - 21 - t16:21:48z 2016 - 12 - 21 - t20:13:36z

From Mary, et al., 1996, Figure 1 on the second page shows a nice breakdown of there the Carbon and Nitrogen go when a plant decomposes. Hadas, et al., 2002 has experimental data from plants with C:N ratios from 11:1 to 136:1.

In summary, most carbon ends up in microbial biomass or as CO$_2$. If the process is allowed to proceed to infinity, then presumably, the microbial biomass will itself be decomposed by other microbes until all of it in the form of CO$_2$.

The nitrogen is mineralized, first into NH$_4^+$, then NO$_2^-$ and eventually all into NO$_3^-$ by various decomposing microbes. Normally these ions are attached to something else that they got from the soil and thus enter the soil. In the regular nitrogen cycle, the ions that eventually end up as NO$_3^-$ will be processed by other bacteria into atmospheric nitrogen (N$_2$). So, if decomposition proceeds to infinity, all the nitrogen would be expected to return to the atmosphere eventually too.

That leaves us with the small amounts of other biologically common elements such as phosoprous, calcium, etc. This will be the only stuff left. From Latshaw, 1934 (side note, not the oldest paper reference I've seen on Stack Exchange, but close!), and the chemical composition of a corn plant, considering all parts of the plant together, there is on average 44.9% oxygen, 44.0% carbon, 6.3% hydrogen, and 1.5% nitrogen by mass; all of these would be expected to leave as as gasses.

Of the remainder, representing 3.3% of the mass, probably most of that would stay. Whatever elements are left are most likely to form molecules with oxygen, since it is freely available in the air and likes to react with just about anything. Silicon, potassium and calcium don't seem to have any likely gaseous forms they could take, while sulfur (SO$_2$) and phosphorous (possibly P$_2$H$_4$) might take some more volatile forms. In the end, little will be left of the former plant, just a scattered residue of oxidized minerals, around 3% of the original mass.

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