Chemical and Spectroscopic Parameters Are Equally Sensitive in Describing Soil Organic Matter Changes After Decades of Different Fertilization

被引:5
作者
Simon, Tomas [1 ]
Madaras, Mikulas [1 ]
机构
[1] Crop Res Inst, Drnovska 507, Prague 16106, Czech Republic
来源
AGRICULTURE-BASEL | 2020年 / 10卷 / 09期
关键词
long-term experiments; fertilization; soil organic carbon; C fractions; organic matter indices; TRANSFORM MIDINFRARED SPECTROSCOPY; MICROBIAL COMMUNITY STRUCTURE; WATER EXTRACTABLE CARBON; AGRICULTURAL SOILS; LAND-USE; FRACTIONS; NITROGEN; QUALITY; IMPACTS; STOCKS;
D O I
10.3390/agriculture10090422
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The composition and dynamics of soil organic matter (SOM) are decisive factors in soil quality. In this work, total organic C (C-tot), hot water extractable C (C-hwl), and aliphatic and aromatic SOM components detected by Fourier transform infrared (FTIR) spectroscopy were determined to evaluate SOM quantity and quality in soil samples taken between 2004 and 2017 from 13 field experiments established in different soil and climatic conditions of the Czech Republic. In addition, the C pool index (CPI), lability index (LI), C management index (CMI), and SOM decomposition index (DI) were assessed. Treatments were selected as follows: Unfertilized control (Nil), mineral fertilized treatment (NPK), farmyard manured treatment (FYM), and organic and mineral fertilized treatment (FYM+NPK). Both organic and combined fertilization significantly increased soil C-tot, C-hwl, CPI, LI, CMI, and labile aliphatic SOM components (FTIRaliph) in most of the experiments compared to unfertilized treatments (p <= 0.05). In contrast, the highest content of recalcitrant aromatic SOM components (FTIRarom) and increased DI were determined in majority of unfertilized soils. Our results show that: (1) fertilization regimes increased both labile and total C pools; the highest increase was nearly uniformly observed for NPK+FYM treatment; (2) SOM chemical and FTIR spectral detection had equal sensitivity to the changes; and (3) none of the parameters or indices tested can be used as a stand-alone SOM quality descriptor.
引用
收藏
页码:1 / 9
页数:9
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