Mineral nitrogen and microbial responses to soil heating in burned grassland

Devan Allen McGranahan,Carissa L. Wonkka,Sadikshya Dangi,Jonathan W. Spiess,Benjamin Geaumont

Geoderma（2022）

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摘要

•Little is known about fire, plant-available N, and soil microbes in US Great Plains•We analyzed fire temperatures, ammonium and nitrate, and PLFA in 5 prairie burns•Thermocouple temperatures averaged 350 °C in plant canopy and 275 °C at soil surface•Burning increased ammonium 1 d after fire and nitrate 7 mo after fire•Soil microbes did not respond to burning; grasslands are resilient to prescribed fire

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关键词

Ammonium nitrogen NH4+,Nitrate nitrogen NO3-,Fire ecology of soils,Fire ecology in working landscapes,Plant-available nitrogen,PLFA,Thermocouple data loggers

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