干旱区生态环境知识资源中心(Arid): 宁夏典型天然草地土壤有机碳及其活性组分变化特征

Arid

	宁夏典型天然草地土壤有机碳及其活性组分变化特征
其他题名	Characteristics of soil organic carbon and active organic carbon in typical natural grassland in Ningxia
	季波; 何建龙; 吴旭东; 王占军; 谢应忠; 蒋齐
来源期刊	草业学报
ISSN	1004-5759
出版年	2021
卷号	30 期号:1 页码:24-35
中文摘要	为探寻宁夏典型温性天然草地土壤有机碳及活性组分变异及储量特征,以宁夏4种典型的天然草地(温性草甸草原、温性草原、温性草原化荒漠和温性荒漠草原)为研究对象,采用野外调查和室内分析相结合的方法,对宁夏全区49个固定监测点,土壤有机碳及其活性有机碳组分(易氧化有机碳、微生物生物量碳和水溶性有机碳)进行采样和室内分析。结果表明:1)宁夏草甸草原、温性草原、草原化荒漠和荒漠草原4种天然草地,0~40 cm土层深度土壤有机碳含量分别为34.23、12.84、5.76和3.82 g·kg~(-1);单位面积土壤有机碳储量分别为:13.43、5.75、2.58和2.29 kg·m~(-2),且均表现为:草甸草原>温性草原>草原化荒漠>荒漠草原。2)4种典型天然草地土样易氧化有机碳含量为0.75~7.43 g·kg~(-1),土壤微生物生物量碳含量为102.52~554.77 mg·kg~(-1),土壤水溶性有机碳含量为69.66~89.61 mg·kg~(-1),均表现为:草甸草原>温性草原>草原化荒漠>荒漠草原。4种草地类型土壤易氧化有机碳储量分别为2.56、1.44、0.62和0 .48 kg·m~(-2);土壤微生物生物量碳储量分别为:218.31、170.50、81.99和68.26 g·m~(-2),均为草甸草原显著高于其他3种草地类型(P<0.05);水溶性有机碳储量分别为34.36、35.21、37.22和43.14 g·m~(-2),表现为荒漠草原显著大于其他3种草地类型(P<0.05)。3)4种典型天然草地易氧化有机碳分配比为18.42%~29.72%,温性草原最高;微生物生物量碳分配比为1.54%~3.83%,草甸草原最低;水溶性有机碳分配比为0.23%~2.01%,表现为:荒漠草原>草原化荒漠 >温性草原>草甸草原,且均存在显著性差异(P<0.05)。4)土壤有机碳储量与土壤易氧化有机碳储量、微生物生物量碳储量、全氮、全磷和全钾含量呈显著(P<0.05)或极显著(P<0.01)正相关关系;与土壤水溶性有机碳储量、土壤容重及pH值呈显著(P<0.05)或极显著(P<0.01)的负相关关系。因此可见,宁夏荒漠草原土壤有机碳稳定性最差,温性草原土壤有机碳活性大,土壤有机碳碳库的生物可利用性最高,宁夏温性天然草地土壤有机碳储量大,不应被低估。
英文摘要	This research explored the variation and characteristics of soil carbon components across four major types of natural grassland(meadow steppe,warm steppe,steppe desert and desert steppe)in Ningxia typical temperate natural grassland.The carbon components were investigated soil organic carbon and active organic carbon(readily oxidized organic carbon,microbial biomass carbon and dissolved organic carbon)at 49 fixed sites,using both survey and direct sampling methods.It was found that soil organic carbon contents to 40 cm soil depth were,respectively,34.23,12.84,5.76 and 3.82 g·kg~(-1),and the soil organic carbon storage was,respectively,13.43,5.75,2.58 and 2.29 kg·m~(-2) in the four natural grassland categories.For the four grassland categories,the readily oxidized organic carbon content ranged from 0.75-7.43 g·kg~(-1),microbial biomass carbon content ranged from 102.52-554.77 mg·kg~(-1),and dissolved organic carbon content ranged from 69.66-89.61 mg·kg~(-1).The overall ranking was meadow steppe>warm steppe>steppe desert>desert steppe.The levels of readily oxidized organic carbon storage were 2.56,1.44,0.62 and 0.48 kg·m~(-2),respectively;soil microbial biomass carbon storage was 218.31,170.50,81.99 and 68.26 g·m~(-2),respectively,with meadow steppe significantly higher than the other grassland types(P<0.05).The soil dissolved organic carbon storage was 34.36,35.21,37.22 and 43.14 g·m~(-2),respectively,and the value for desert steppe was significantly larger than the other grassland types(P<0.05).The range of values in the four grassland types for readily oxidized organic carbon was18.42%-29.72%,with the warm steppe being the highest.The range of values for microbial biomass carbon was 1.54%-3.83%,and meadow steppe grassland was the lowest.The range of values for dissolved organic carbon was 0.23%-2.01%,with ranking desert steppe>steppe desert>warm steppe>meadow steppe,and with significant differences(P<0.05)between the four grassland types.Soil organic carbon storage showed a significant(P<0.05)or extremely significant(P<0.01)positive correlation with soil readily oxidized organic carbon storage,microbial biomass carbon storage,total nitrogen,total phosphorus and total potassium,and showed significant(P<0.05)or extremely significant(P<0.01)negative correlation with soil dissolved organic carbon storage,soil bulk density and pH values.In summary,soil organic carbon stability was lowest in desert grassland,while the activity and bioavailability of the soil organic carbon pool in warm grassland was the highest.The importance of the soil organic carbon storage of natural grassland in Ningxia should not be underestimated.
中文关键词	宁夏 ; 天然草地 ; 土壤有机碳 ; 土壤活性有机碳
英文关键词	Ningxia natural grassland soil organic carbon soil active organic carbon
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6892641
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354179
作者单位	季波, 宁夏大学农学院;;宁夏农林科学院荒漠化治理研究所;;宁夏防沙治沙与水土保持重点实验室, ;;;;宁夏防沙治沙与水土保持重点实验室, 银川;;银川;;银川, 宁夏;;宁夏;;宁夏 750021;;750002;;750002, 中国. 何建龙, 宁夏农林科学院荒漠化治理研究所;;宁夏防沙治沙与水土保持重点实验室, ;;宁夏防沙治沙与水土保持重点实验室, 银川;;银川, 宁夏;;宁夏 750002;;750002, 中国. 吴旭东, 宁夏农林科学院荒漠化治理研究所;;宁夏防沙治沙与水土保持重点实验室, ;;宁夏防沙治沙与水土保持重点实验室, 银川;;银川, 宁夏;;宁夏 750002;;750002, 中国. 王占军, 宁夏农林科学院荒漠化治理研究所;;宁夏防沙治沙与水土保持重点实验室, ;;宁夏防沙治沙与水土保持重点实验室, 银川;;银川, 宁夏;;宁夏 750002;;750002, 中国. 蒋齐, 宁夏农林科学院荒漠化治理研究所;;宁夏防沙治沙与水土保持重点实验室, ;;宁夏防沙治沙与水土保持重点实验室, 银川;;银川, 宁夏;;宁夏 750002;;750002, 中国. 谢应忠, 宁夏大学农学院, 银川, 宁夏 750021, 中国.
推荐引用方式 GB/T 7714	季波,何建龙,吴旭东,等. 宁夏典型天然草地土壤有机碳及其活性组分变化特征[J]. 宁夏大学,2021,30(1):24-35.
APA	季波,何建龙,吴旭东,王占军,谢应忠,&蒋齐.(2021).宁夏典型天然草地土壤有机碳及其活性组分变化特征.草业学报,30(1),24-35.
MLA	季波,et al."宁夏典型天然草地土壤有机碳及其活性组分变化特征".草业学报 30.1(2021):24-35.