有机物添加对山西太岳山油松林土壤呼吸及碳组分的影响

doi:10.12302/j.issn.1000-2006.202112045

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南京林业大学学报（自然科学版） ›› 2023, Vol. 47 ›› Issue (1): 67-75.doi: 10.12302/j.issn.1000-2006.202112045

所属专题：双碳目标下的土壤碳组分

• 专题报道Ⅱ:双碳目标下的土壤碳组分 • 上一篇下一篇

有机物添加对山西太岳山油松林土壤呼吸及碳组分的影响

孙美佳¹(), 周志勇²^,³^,^*(), 王勇强⁴, 沈颖²^,³, 夏威¹^,²

1.北京林业大学林学院,北京 100083
2.山西太岳山森林生态系统国家定位观测研究站,山西长治 046000
3.北京林业大学生态与自然保护学院,北京 100083
4.山西灵空山国家级自然保护区管理局,山西长治 046000

收稿日期:2021-12-24 接受日期:2022-06-22 出版日期:2023-01-30 发布日期:2023-02-01
通讯作者: 周志勇
基金资助:
中央高校基本科研业务费专项资金项目(PTYX202144)

The effect of organic matter addition on soil respiration and carbon component in Pinus tabuliformis forests in Taiyue Mountain, Shanxi Province, China

SUN Meijia¹(), ZHOU Zhiyong²^,³^,^*(), WANG Yongqiang⁴, SHEN Ying²^,³, XIA Wei¹^,²

1. College of Forestry, Beijing Forestry University, Beijing 100083, China
2. Shanxi Taiyue Mountain Forest Ecosystem National Orientation Observation and Research Station, Changzhi 046000, China
3. College of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
4. Shanxi Lingkong Mountain National Nature Reserve Administration, Changzhi 046000, China

Received:2021-12-24 Accepted:2022-06-22 Online:2023-01-30 Published:2023-02-01
Contact: ZHOU Zhiyong

摘要/Abstract

摘要： 【目的】 探讨添加不同类型有机物对油松林土壤有机碳组分及土壤呼吸的影响,为预测山西太岳山油松林生态系统中土壤的碳收支平衡提供参考。【方法】 采用随机区组设计,以山西太岳山油松林地表的平均自然凋落物量为标准,向油松林地0~20 cm土壤中分别添加生物炭(BC)、玉米秸秆(JG)、辽东栎叶(LD)和油松叶(YS)等4种类型有机物,使用LI-8100 CO₂通量全自动测量系统对有机物添加条件下的土壤呼吸速率进行连续测定,并对各处理的土壤有机碳(SOC)、微生物生物量碳(MBC)、易氧化碳(ROC)、可溶性有机碳(DOC)含量进行监测,结合土壤呼吸与土壤有机碳及其组分之间的关系,探讨添加有机物对山西太岳山油松林土壤呼吸及碳组分的影响。【结果】 ①向土壤中添加BC显著降低了土壤呼吸速率,添加JG后土壤呼吸速率较CK显著提高了11.67%。,其余处理与CK差异不显著。在2014年7—11月和2015年5—10月,不同添加物处理间土壤呼吸速率从大至小表现为JG>LD >YS>CK。②有机物添加下土壤SOC含量随时间的增加有上升的趋势,在2014年8月,添加JG后显著提高了土壤SOC、MBC、ROC、DOC含量,添加BC显著提高了土壤MBC含量,添加LD和YS显著提高了土壤SOC和MBC含量。在2014年10月,添加JG显著提高了土壤SOC、MBC、ROC、DOC含量,添加LD显著提高了土壤MBC和ROC含量,添加YS显著提高了土壤SOC、MBC含量。在2015年3月,添加JG显著提高了土壤SOC、MBC和ROC含量,添加LD显著提高了土壤ROC含量。2015年5月,添加JG显著增加了土壤MBC含量。③与对照相比,添加BC后土温10 ℃时的土壤呼吸速率(R₁₀)显著降低了18.01%,添加YS后R₁₀显著增加了30.88%,添加其他有机物对温度敏感性系数(Q₁₀)和R₁₀没有显著影响。④土壤呼吸速率与土壤温度、SOC、MBC、ROC和DOC含量显著正相关。【结论】 添加有机物显著影响土壤碳动态和土壤温湿度,这些都会对土壤CO₂排放产生显著影响,添加JG对土壤有机碳及其碳组分的提高效果最显著,但土壤呼吸速率最高,不利于碳的储存;添加LD可增加土壤活性有机碳含量,短期内可明显改善土壤有机碳库质量;添加BC可在短期内提高土壤微生物生物量碳含量,并显著降低土壤呼吸速率,减少土壤CO₂排放的效果最好。

关键词: 有机物, 土壤呼吸, 土壤有机碳, 活性有机碳

Abstract:

【Objective】 This research aims to investigate the effects of different organic matters on soil organic carbon and soil respiration in Pinus tabuliformis forest. The results can provide reference for predicting soil carbon budget of P. tabuliformis forest ecosystem in Taiyue Mountain, Shanxi Province, China.【Method】A random block design was used to add biochar (BC), maize straw (JG), Quercus mongolica leaf (LD) and P. tabuliformis leaf (YS) to 0-20 cm soil of P. tabuliformis forest in Taiyue Mountain, with no addition as control check (CK). Li-8100 automatic measurement system for CO₂ flux was used to continuously measure soil respiration rate under organic matter addition, and the contents of soil organic carbon (SOC), microbial biomass carbon (MBC), readily oxidized carbon (ROC) and dissolved organic carbon (DOC) in each treatment were monitored. Based on the relationship between soil respiration and soil organic carbon and its components, the effects of organic matter addition on soil respiration and soil carbon components of P. tabuliformis forest in Taiyue Mountain were investigated. 【Result】 (1)The addition of biochar significantly reduced the soil respiration rate, and the soil respiration rate was significantly increased by 11.67% after adding JG compared with CK, while there was no significant difference between other treatments and CK. (2)In August 2014, the addition of JG significantly increased the soil SOC, MBC, ROC and DOC contents, the addition of BC significantly increased the soil MBC content, and the addition of LD and YS significantly increased the soil SOC and MBC contents. In October 2014, the addition of JG significantly increased soil SOC, MBC, ROC and DOC contents, the addition of LD significantly increased soil MBC and ROC contents, and the addition of YS significantly increased soil SOC and MBC contents. In March 2015, the addition of JG significantly increased soil SOC, MBC and ROC contents, while the addition of LD significantly increased soil ROC contents. In May 2015, JG supplementation significantly increased soil MBC content.(3) Compared with CK, soil respiration at 10 (R₁₀) was significantly decreased by 18.01% after BC addition, and increased by 30.88% after YS leaf addition. Other organic compounds had no significant effect on soil respiration temperature sensitivity (Q₁₀) and R₁₀. (4) Soil respiration rate was significantly positively correlated with soil temperature, SOC, MBC, ROC and DOC. 【Conclusion】 The addition of organic matter significantly affected soil carbon dynamics and soil temperature and humidity, which all had significant effects on soil CO₂ emissions. The addition of JG had the most significant effect on soil organic carbon and its carbon components, but the soil respiration rate was the highest, which was not conducive to carbon storage. The addition of LD could increase soil active organic carbon content and significantly improve soil organic carbon pool quality in a short term, while the addition of BC could increase soil microbial biomass carbon content in a short term, and significantly reduce soil respiration rate, which has the best effect on reducing soil CO₂ emission.

Key words: organic matter, soil respiration, soil organic carbon, soil active organic carbon

中图分类号:

S718.5

孙美佳,周志勇,王勇强,等. 有机物添加对山西太岳山油松林土壤呼吸及碳组分的影响[J]. 南京林业大学学报（自然科学版）, 2023, 47(1): 67-75.

SUN Meijia, ZHOU Zhiyong, WANG Yongqiang, SHEN Ying, XIA Wei. The effect of organic matter addition on soil respiration and carbon component in Pinus tabuliformis forests in Taiyue Mountain, Shanxi Province, China[J].Journal of Nanjing Forestry University (Natural Science Edition), 2023, 47(1): 67-75.DOI: 10.12302/j.issn.1000-2006.202112045.

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有机物类型 the type of organic matter	有机碳含量/ (g·kg^-1) soil organic carbon content	全氮含量/ (g·kg^-1) total nitrogen content	碳氮比 C/N
生物炭biochar(BC)	336.02±0.18	2.61±0.11	128.74
玉米秸秆maize straw (JG)	399.22±0.09	2.45±0.21	162.95
辽东栎叶Quercus mongolica leaf (LD)	399.22±0.12	11.59±0.07	34.45
油松叶Pinus tabuliformis leaf (YS)	432.92±0.13	6.09±0.17	71.09

变量 variable	影响因素 factor	自由度 df	F	P
土壤有机碳 SOC	时间	4	7.991	<0.001
	处理	4	6.674	<0.001
	时间×处理	16	0.489	0.946
土壤微生物生物量碳 MBC	时间	4	175.746	<0.001
	处理	4	19.711	<0.001
	时间×处理	16	3.916	<0.001
土壤易氧化碳 ROC	时间	4	2.203	0.075
	处理	4	5.859	<0.001
	时间×处理	16	0.361	0.988
土壤可溶性有机碳 DOC	时间	4	15.713	<0.001
	处理	4	2.944	0.024
	时间×处理	16	0.324	0.993

变量 variable	影响因素 factor	自由度 df	F	P
土壤呼吸速率 soil respiration rate	时间	9	279.464	<0.001
	处理	4	30.942	<0.001
	时间×处理	36	1.400	0.062
土壤温度 soil temperature	时间	9	4 917.121	<0.001
	处理	4	0.483	0.748
	时间×处理	36	1.965	0.001
土壤湿度 soil moisture	时间	9	1 085.756	<0.001
	处理	4	11.582	<0.001
	时间×处理	36	2.693	<0.001

有机物添加对山西太岳山油松林土壤呼吸及碳组分的影响

The effect of organic matter addition on soil respiration and carbon component in Pinus tabuliformis forests in Taiyue Mountain, Shanxi Province, China

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