Potential mineralization and nitrification in volcanic grassland soils in Chile
Potential mineralization and nitrification in volcanic grassland soils in Chile
复制标题
智利火山草原土壤的潜在矿化和硝化作用
DOI:
10.1080/00380768.2013.789395
复制
发表时间:
2013
影响因子:
2
通讯作者:
Cardenas L
中科院分区:
文献类型:
--
作者:
Cardenas L
A proportion of the nitrogen (N) applied to grasslands as organic or inorganic fertilizers can be lost to water courses as nitrate and to the atmosphere as nitrous and nitric oxides. Volcanic soils from Chile are not generally prone to leaching, possibly due to net immobilization of nitrate and/or ammonium, and/or due to inhibition of nitrification by either chemical or physical processes. In laboratory studies we found large mineralization potentials in soils from three different Chilean soils after 17 weeks of incubation, totalling 215 and 254 mg kg−1dry soil for two Andisols and 127 mg kg−1dry soil in an Ultisol. Nitrification occurred after a short period, and was lowest in the Ultisol. In addition, microbial analysis showed nitrifiers to be present in all three soils. Adsorption of ammonium was two-fold stronger than for nitrate, ranging from 29 to 180 kg N ha−1. The highest potential for N adsorption in the 0–60 cm soil profile was with the Ultisol (398 kg N ha−1), but was similar in both Andisols (193 and 172 kg N ha−1, respectively). The combination of ammonium retention together with delayed nitrification could account for the low leaching rates in these soils.
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DOI:
--
发表时间:
1985
期刊:
--
影响因子:
--
作者:
Inia;T. JuanTosso
通讯作者:
T. JuanTosso
DOI:
10.4067/s0718-27912009000100006
发表时间:
2009
影响因子:
--
作者:
P. Cartes;Alejandra A. Jara;R. Demanet;M. Mora
通讯作者:
M. Mora
影响因子:
3.9
作者:
F. Salazar;M. Alfaro;S. Ledgard;S. Iraira;N. Teuber;L. Ramírez
通讯作者:
L. Ramírez
影响因子:
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作者:
J. Rodríguez;H. Silva
通讯作者:
H. Silva
影响因子:
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作者:
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