添加中微量元素对风沙土矿化特征和土壤有机碳组分的影响

doi:10.13866/j.azr.2025.07.08

摘要/Abstract

摘要： 为探明有机肥配合中微量元素后在风沙土中的矿化特征及其对土壤有机碳组分的影响，采用室内培养试验和田间试验，研究了有机肥和添加中微量元素后的有机肥在风沙土的分解率及残留率及其不同施用水平对土壤有机碳、活性有机碳、颗粒有机碳、矿质结合态有机碳、微生物碳以及氨基葡萄糖、氨基半乳糖和胞壁酸含量的影响。结果表明：与施用有机肥相比，室内培养试验下添加中微量元素的有机肥降低了土壤有机碳的矿化量；田间试验下添加中微量元素的有机肥进一步提高了土壤中活性有机碳（1.79%~1.99%）、低活性有机碳（2.20%~4.91%）、矿质结合态有机碳（3.89%~7.95%）、微生物量碳含量（1.71%~8.10%），同时提高了土壤氨基葡萄糖（3.46%~6.32%）、氨基半乳糖（1.21%~13.32%）、胞壁酸（2.41%~6.14%）和微生物残体碳含量（2.70%~4.99%）；降低了土壤高活性有机碳（0.71%~1.48%）和颗粒有机碳含量（4.91%~5.86%），但差异不显著；说明添加中微量元素后的有机肥在一定程度上可以减缓有机肥在风沙土中的矿化，提高土壤中活性有机碳、低活性有机碳、矿质结合态有机碳、微生物量碳含量，促进有机碳的周转和固存。

关键词: 有机肥, 矿化, 有机碳, 风沙土, 中微量元素, 有机碳组分

Abstract:

To examine the mineralization characteristics and their effect on soil organic carbon components in sandy loamy soils following the application of organic fertilizers in conjunction with trace elements, indoor culture experiments and field trials were conducted. We assessed the decomposition rate and residue ratio as well as the influence of varying amounts of organic fertilizer on soil organic carbon, active organic carbon, particulate organic carbon, organo-mineral-bound organic carbon, and microbial carbon content, as well as the level of amino sugars, N-galactosamine, and galactomannan. Compared with the application of organic fertilizers alone, the addition of trace elements to the indoor culture significantly decreased the amount of mineralized organic carbon in the sandy loam soils. In field trials, this addition further increased active organic carbon (1.79%-1.99%), low-active organic carbon (2.20%-4.91%), organo-mineral-bound organic carbon (3.89%-7.95%), and microbial carbon (1.71%-8.10%) content, while also enhancing the level of amino sugars (3.46%-6.32%), N-galactosamine (1.21%-13.32%), galactomannan (2.41%-6.14%), and microbial residual carbon (2.70%-4.99%). However, the increase was less pronounced for high-active organic carbon (0.71%-1.48%) and particulate organic carbon (4.91%-5.86%) content. The addition of micro and trace elements to organic fertilizers may, to some extent, mitigate the mineralization process of organic fertilizers in sandy soils, thereby enhancing the level of labile organic carbon, recalcitrant organic carbon, organic carbon bound with minerals, and microbial biomass carbon in the soil, ultimately promoting the turnover and retention of organic carbon in the soil.

Key words: organic fertilizer, mineralization, organic carbon, aeolian sandy soil, medium and trace elements, organic carbon components

刘佳月, 寇威, 原建强, 薛少琪, 王旭东. 添加中微量元素对风沙土矿化特征和土壤有机碳组分的影响[J]. 干旱区研究, 2025, 42(7): 1246-1256.

LIU Jiayue, KOU Wei, YUAN Jianqiang, XUE Shaoqi, WANG Xudong. Effects of incorporating medium and trace elements on the mineralization characteristics and soil organic carbon components of aeolian sandy soil[J]. Arid Zone Research, 2025, 42(7): 1246-1256.

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	有机碳 /（g·kg^-1）	全氮 /（g·kg^-1）	全磷 /（g·kg^-1）	全钾 /（g·kg^-1）	Fe /（g·kg^-1）	Mn /（g·kg^-1）	Cu /（mg·kg^-1）	Zn /（mg·kg^-1）	Ca /（mg·kg^-1）
有机肥	18.3	10.51	8.98	35.44	18.83	0.30	32.08	164.80	398.35
有机肥+中微量元素	17.6	10.11	8.63	34.16	23.98	0.39	30.85	220.69	401.95

处理	POC/SOC	MAOC/SOC	MBC/SOC
CK	36.34±1.28a	63.66±1.28e	1.20±0.02e
OF1	36.16±0.36a	63.84±0.36e	1.25±0.01d
OF2	35.41±0.93ab	64.59±0.93de	1.28±0.04d
OF3	34.59±0.07bc	65.41±0.07cd	1.42±0.02b
OF4	33.80±0.68cd	66.20±0.68bc	1.51±0.03a
OF1+ME	34.16±0.35cd	65.84±0.35bc	1.34±0.01c
OF2+ME	33.39±0.21d	66.61±0.21b	1.37±0.01c
OF3+ME	32.19±0.36e	67.81±0.36a	1.51±0.02a
OF4+ME	31.65±0.02e	68.35±0.02a	1.51±0.02a