我用什么方法获得有机物质含量(百分比)每层SoilGrids -地球科学栈交流江南电子竞技平台江南体育网页版 最近30从www.hoelymoley.com 2023 - 07 - 07 - t15:30:39z //www.hoelymoley.com/feeds/question/20693 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/20693 1 我用什么方法获得有机物质含量(百分比)每层SoilGrids Eric Laukonen //www.hoelymoley.com/users/0 2021 - 01 - 18 - t02:32:11z 2021 - 01 - 20 - t21:27:43z < p >我做土壤相关计算水分含量和土壤特征的内容我需要(等)是土壤的比例为:< / p > < ul > <李> < /李> <李>砂粘土< /李> <李>有机质李< / > < / ul > < p >我想取砂内容(g)除以1000粘土砂含量百分比,像明智的(除了使用g)中的粘土含量值。有机物做我他们提供的土壤有机质含量dc /公斤,除以10000吗?似乎有些地区将有一个非常高的有机材料内容。我预计介于1%和6%,但一些地区如果我使用这种方法就像44%。< / p > //www.hoelymoley.com/questions/20693/-/20695 # 20695 1 灰回答的我用什么方法获得有机物质含量(百分比)每层SoilGrids 灰 //www.hoelymoley.com/users/10735 2021 - 01 - 18 - t21:05:09z 2021 - 01 - 18 - t21:05:09z < p >所有重量百分比计算使用相同的公式:< / p > < p >质量分数/总样本质量< / p > < p >有两种不同的价值观有机物质在土壤和他们得到了不同的技术:< / p > < p >如果你想知道有多少可利用有机物质在土壤中我学会了使用化学试剂氧化和地带从土壤中有机碳,饱和土壤样品测试之前和之后重估算有机物的重量所以删除或可以进行土壤渗滤液滴定确定碳氧化的确切数量。< / p > < p >如果你想总土壤碳重干样本然后摧毁它,把它放进坩埚在本生灯,直到它停止吸烟,样品也更深了,因为它开始燃烧,然后变成苍白一旦所有的碳烧了它,并reweigh不同之处在于所有土壤碳。< / p > //www.hoelymoley.com/questions/20693/-/20699 # 20699 1 Nemesi回答的我用什么方法获得有机物质含量(百分比)每层SoilGrids Nemesi //www.hoelymoley.com/users/8087 2021 - 01 - 19 t08:58:41z 2021 - 01 - 19 t08:58:41z

If you are not in the position of following the steps suggested in Ash's answer, I'd suggest you to rely on existing data, as the ISRIC dataset "WISE derived soil properties on a 30 by 30 arc-seconds global grid", developed at Wageningen university and available here. This dataset is originally based on the FAO-Unesco Soil Map of the World (DSMW). Of course, the 5 arc-minutes resolution (about 9.2 km at the equator) might be a little coarse if you are conducting a specific site project, but it could be a useful reference if your domain is broader.

Additional information about the project available here.

Methodology and main variables described here.
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