TITLE:
Pedo-Transfer Functions to Estimate Kinetic Parameters for Anaerobic Soil Nitrogen Mineralization
AUTHORS:
Ganghua Zou, Fengliang Zhao, Ying Shan, Yong Li
KEYWORDS:
Nitrogen Mineralization, Pedotransfer Function, Soil Nutrient, Land Use
JOURNAL NAME:
Open Journal of Soil Science,
Vol.8 No.2,
February
13,
2018
ABSTRACT: Knowledge of potential
anaerobic soil N mineralization is important for nitrogen fertilizer
application. Instead of time-consuming laboratory incubation, we attempt to use
pedo-transfer functions (PTFs) approach to get this information. 27 soil
samples with various soil depths were collected from paddy field, woodland and
tea field in subtropical central China, anaerobically incubated at 35°C for 7 weeks to determine N mineralization, which was fitted by a modified
double exponential model with two parameters (the fraction of active N pool (f) and mineralization rate constant (k) for active N pool). The PTFs for
parameters were developed from significant soil properties using multiple
stepwise regression method. Parameter f (range: 1.59% - 10.4%, mean: 5.2%) was mainly correlated with soil total N (TN), organic C (SOC), sand and silt particle contents (r = -0.59 - 0.69, p k (range: 0.027 - 0.155 d-1, mean: 0.97 d-1) was significantly related to TN, SOC, clay content, C to N ratio and pH (r = -0.6 - 0.71, p f (R2 = 0.72, p TN and pH) for parameter k (R2 = 0.61, p