Deep soil contributions to global nitrogen budgets

被引:0
|
作者
Almaraz, Maya [1 ,2 ]
Wang, Chao [3 ]
Wong, Michelle Y. [4 ,5 ]
机构
[1] Yale Univ, Yale Ctr Nat Carbon Capture, New Haven, CT 06520 USA
[2] Yale Univ, Yale Sch Environm, New Haven, CT 06520 USA
[3] Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Silviculture, Shenyang, Peoples R China
[4] Cary Inst Ecosyst Studies, Millbrook, NY USA
[5] Yale Univ, Dept Ecol & Evolutionary Biol, New Haven, CT USA
关键词
NITRATE; CARBON; ROOTS; DEPTH; ZONE; FERTILIZER; ECOSYSTEM; CYCLES; GROWTH;
D O I
10.1038/s41467-025-56132-1
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Previous estimates of deep soil inorganic nitrogen (N) reservoirs have been mainly limited to desert soils, however, recent evidence suggests that deep soil pools are far more ubiquitous across biomes and therefore may be important for global N budgets. Here, we used observations from 280 deep soil profiles (2-205 m) across a wide array of ecosystem and land cover types to seek insight into the full geospatial variation of deep soil nitrate. Using a random forest machine learning approach we estimate a total deep soil nitrate pool of 15.2 ( +/- 1.1 SD) Pg of N. When included in the global soil N pool, our estimates of deep soil N increase the global N storage budget by 16%. Estimating these deep soil N pools continues to add to our understanding of soils as a fate for anthropogenically fixed N, and the critical role that deep soils play in our biosphere.
引用
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页数:7
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