秸秆和硫酸铝对淡黑钙土有机矿质复合体及有机碳分布的影响

发布时间：2018-03-27 22:02

本文选题：淡黑钙土　切入点：秸秆　出处：《农业环境科学学报》2017年05期

【摘要】：以吉林省典型土壤淡黑钙土为研究对象,采用室内恒温培养法研究在不同秸秆和硫酸铝添加量下,淡黑钙土中有机矿质复合体的含量及有机碳在其中的分布,探讨有机矿质复合体对淡黑钙土固碳的贡献。结果表明:对于秸秆和硫酸铝添加的所有处理,复合体含量均表现为G_1(钠分散组)G_0(水分散组)G_2(钠质研磨分散组);与对照相比,秸秆和硫酸铝添加使得淡黑钙土中G_0组复合体的含量降低,G_2组复合体的含量明显上升,而对G_1组复合体的含量影响不大。单位质量复合体中有机碳的含量大小表现为G_2G_0G_1,G_2组复合体中的有机碳含量最高(平均含量为95.92 g·kg~(-1)),约为单位质量G_0组和G_1组复合体中有机碳含量的3倍,G_0组(平均含量为33.89 g·kg~(-1))略高于G_1组(平均含量为32.25 g·kg~(-1))。秸秆和硫酸铝添加均有助于提高G_0组复合体中有机碳的含量;而G_1组复合体有机碳含量的变化主要受秸秆添加量的影响,随着秸秆添加量的增加,G_1组复合体有机碳含量增加;秸秆对G_2组复合体中有机碳含量的提高具有促进作用,而硫酸铝的影响则相反。各组复合体对淡黑钙土固碳的贡献率取决于土壤中复合体的含量及单位质量复合体中有机碳的含量,其对固碳贡献的大小顺序为G_1G_0G_2;有机矿质复合体(G_0+G_1+G_2)质量仅占淡黑钙土质量的约四分之一,但其对于淡黑钙土固碳的贡献却为61.96%~73.56%。
[Abstract]:The content of organic mineral complex and the distribution of organic carbon in typical calcareous soil of Jilin Province were studied by using the method of constant temperature culture under different amounts of straw and aluminum sulfate. The contribution of organic mineral complex to carbon sequestration of light calcareous soil was studied. The results showed that the content of organic mineral complex in all treatments added with straw and aluminum sulfate was G-1 (sodium dispersive group G0). The addition of straw and aluminum sulfate decreased the content of Gs0 complex in calcareous soil and increased the content of GS-2 complex in calcareous soil. The content of organic carbon in G2G0G1 / G-1 group is the highest (average content is 95.92 g / kg 路kg ~ (-1) ~ (-1)) in group G _ (2) G _ (0) and G _ (1) (average content is 95.92 g 路kg ~ (-1) ~ (-1)), which is about a unit mass group of G _ 0 and G _ (1) groups. The content of organic carbon in group G _ 0 (mean 33.89 g 路kg ~ (-1)) was slightly higher than that in group G1 (the average content was 32.25 g 路kg ~ (-1)). The addition of straw and aluminum sulfate could increase the content of organic carbon in group G0. The content of organic carbon in group G1 was mainly affected by the amount of straw added, and the content of organic carbon in group G1 increased with the increase of the amount of straw, and the increase of organic carbon content in group G2 was promoted by straw. The contribution rate of each group of complexes to carbon sequestration of light calcareous soil depends on the content of complex in soil and the content of organic carbon in unit mass complex. The order of its contribution to carbon sequestration is in the order of G1G0G\ + +\ +\ +\ {2\}\ #\ +\ {2\}\ #\ #\ #\ #\ {#}\ #\ #\ #\ #\ #\ # #\ {#}\ #\ #\ #\ #\ #???
【作者单位】：吉林农业大学资源与环境学院吉林省商品粮基地土壤资源可持续利用重点实验室;Faculty
【基金】：国家自然科学基金青年科学基金(41403077) 公益性行业科研专项基金(201503116)~~
【分类号】：S153.6

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