Incorporated maize residues will induce more accumulation of new POC in HF compared with that in LF soils: a comparison
- PDF / 533,553 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 40 Downloads / 162 Views
SOILS, SEC 3 • REMEDIATION AND MANAGEMENT OF CONTAMINATED OR DEGRADED LANDS • RESEARCH ARTICLE
Incorporated maize residues will induce more accumulation of new POC in HF compared with that in LF soils: a comparison of different residue types Yang Wang 1 & Shuangyi Li 1 & Yingde Xu 1 & Ming Li 1 & Te Shan 1 & Weijun Zhang 1 & Xu Liu 1 & Muhammad Farhan Saeed 1 & Jingkuan Wang 1 Received: 20 January 2020 / Accepted: 8 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose The distribution and dynamic of residue-derived carbon after incorporation into soil at different fertility levels have been well documented. However, the distribution of maize residue–derived C in particulate organic C (POC) from different types of organic residues in soils of different fertility levels is poorly understood. Material and methods A 540-day in situ field experiment was carried out. In 2016, three types of 13C-labeled maize residues (root, stem, leaf) were added to brown earth of different fertility levels in Northeast China. 13C-POC content in the soil samples was measured on the 60th, 90th, 180th, and 540th days after in situ incubation. Results and discussion The results showed that 13C-POC content was significantly higher in high-fertility soil than in lowfertility soil during the whole incubation time. There were significant differences among different types of maize residues at the beginning of 180 days, with stem (0.13 g kg−1) and root (0.11 g kg−1) residues higher than leaf residue (0.08 g kg−1), and sequestration of residue in POC was similar between the roots, stems, and leaves after the 540-day field incubation. The mean residence time and residue POC in soils at each fertility level increased (P < 0.05) with increasing incubation time, with a range from 1.52 to 128.72 years in the high-fertility soil and 1.07 to 60.52 years in the low-fertility soil, but showed no significant differences among different types of maize residue. Conclusions The results revealed that high-fertility soil was more conducive for new POC accumulation than low-fertility soil, and its sequestration was similar among the roots, stems, and leaves after 540 days. Keywords
13
C-labeling technique . Crop residue . Particulate organic carbon . Fertility levels . Maize residue types
1 Introduction Soil organic matter (SOM) is a heterogeneous mixture of organic substances with different compounds, lability, and Responsible editor: Yan He * Shuangyi Li [email protected] * Jingkuan Wang [email protected]; [email protected] 1
Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture, College of Land and Environment, Shenyang Agricultural University, No. 120 Dongling Road, Shenhe District, Shenyang 110866, Liaoning, People’s Republic of China
functions in soils (Kantola et al. 2017; Liu et al. 2018). It is more convenient to separate organic carbon into different C pools because different forms of organic matter can exert different effects on soil fertility and respond different
Data Loading...
