吉林农业大学学报2018，Vol.40Issue(6)：716-721,6.DOI:10.13327/j.jjlau.2018.4115
不同CO2浓度长期培养玉米秸秆对土壤腐殖质组成和胡敏酸结构特征的影响
Effects of Different CO2 Concentrations on Humus Composition and Structural Characteristics of Humic Acid under Long-term Corn Stalk Incubation
摘要
Abstract
In the past, more studies have been conducted on the changes of soil humus formation under short-term incubation of corn stalk with different CO2 concentrations, but there have been few studies on HA structure of soil after long-term decomposition of stalk. By elemental analysis and infrared spectroscopy, indoor simulation experiment was conducted to study the effects of different CO2 concentrations on humus composition and structural characteristics of humic acid after 1 440 d corn stalk incubation. The experiment included six treatments: stalk adding treatments under CO2 concentrations of 48％ ～ 52％( C), 8％ ～ 12％( F) and ＜ 2％( G), respectively, and no stalk adding control groups under each CO2 concentration which were named CKC, CKF and CKG, respectively.The results show that: After 1 440 d, soil organic carbon( SOC) and fraction of humic substances( WSS, FA, HA, HM) treated with corn stalk incubation under different CO2 concentrations were higher than the control, and the highest was in F treatment. The order of the value of PQ was F＞ C＞ G. Compared with the control, the ratio of the H/C and 2920/1620 were increased and the O/C ratio was decreased with corn stalk incubation after 1 440 d, and F treatment was also the most obvious. The above results indicate that the CO2 concentration of 8％ ～ 12％ was favorable to the formation and stability of HA, to the condensation and oxidation degree and to the proportion of aliphatic chain hydrocarbon of soil HA.关键词
玉米秸秆/二氧化碳/土壤有机碳/腐殖质组成/胡敏酸结构Key words
corn stalk/CO2/soil organic carbon/humus composition/HA structure分类
农业科技引用本文复制引用
盖艳双,窦森..不同CO2浓度长期培养玉米秸秆对土壤腐殖质组成和胡敏酸结构特征的影响[J].吉林农业大学学报,2018,40(6):716-721,6.基金项目
国家重点研发计划项目(2016YFD0200304) （2016YFD0200304）
