Soil carbon sequestration under long-term rice-based cropping systems of purple soil in Southwest China

FAN Hong-zhu; CHEN Qing-rui; QIN Yu-sheng; CHEN Kun; TU Shi-hua; XU Ming-gang; ZHANG Wen-ju

首页> 中文期刊> 《农业科学学报（英文版）》 >Soil carbon sequestration under long-term rice-based cropping systems of purple soil in Southwest China

Soil carbon sequestration under long-term rice-based cropping systems of purple soil in Southwest China

开具论文收录证明 >>

期刊封面封底目录下载 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

Carbon sequestration in agricultural soils is a complex process controled by farming practices, climate and some other environment factors. Since purple soils are unique in China and used as the main cropland in Sichuan Basin of China, it is of great importance to study and understand the impacts of different fertilizer amendments on soil organic carbon (SOC) changes with time. A research was carried out to investigate the relationship between soil carbon sequestration and organic carbon input as affected by different fertilizer treatments at two long-term rice-based cropping system experiments set up in early 1980s. Each experiment consisted of six identical treatments, including (1) no fertilizer (CK), (2) nitrogen and phos-phorus fertilizers (NP), (3) nitrogen, phosphorus and potassium fertilizers (NPK), (4) fresh pig manure (M), (5) nitrogen and phosphorus fertilizers plus manure (MNP), and (6) nitrogen, phosphorus and potassium fertilizers plus manure (MNPK). The results showed that annual harvestable carbon biomass was the highest in the treatment of MNPK, folowed by MNP and NPK, then M and NP, and the lowest in CK. Most of fertilizer treatments resulted in a signiifcant gain in SOC ranging from 6.48 to 29.13% compared with the CK, and raised soil carbon sequestration rate to 0.10–0.53 t ha–1 yr−1. Especialy, addition of manure on the basis of mineral fertilizers was very conducive to SOC maintenance in this soil. SOC content and soil carbon sequestration rate under balanced fertilizer treatments (NPK and MNPK) in the calcareous purple soil (Suining) were higher than that in the acid purple soil (Leshan). But carbon conversion rate at Leshan was 11.00%, almost 1.5 times of that (7.80%) at Suining. Signiifcant linear correlations between soil carbon sequestration and carbon input were observed at both sites, signifying that the purple soil was not carbon-saturated and stil had considerable potential to sequestrate more carbon.

著录项

来源
《农业科学学报（英文版）》 |2015年第12期|2417-2425|共9页
作者
FAN Hong-zhu; CHEN Qing-rui; QIN Yu-sheng; CHEN Kun; TU Shi-hua; XU Ming-gang; ZHANG Wen-ju;
展开▼
作者单位

Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, P.R.China;

Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, P.R.China;

Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, P.R.China;

Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, P.R.China;

Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, P.R.China;

Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China;

Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China;

展开▼
原文格式 PDF
正文语种 eng
中图分类
关键词

Soil carbon sequestration under long-term rice-based cropping systems of purple soil in Southwest China

摘要

著录项

相关主题

期刊订阅