干旱区生态环境知识资源中心(Arid): 不同荒漠草原植被根际与非根际土壤养分及碳库管理指数特征

Arid

	不同荒漠草原植被根际与非根际土壤养分及碳库管理指数特征
其他题名	Soil nutrients and carbon management indexes in the rhizosphere versus non-rhizosphere area of different plant species in desert grassland
	张义凡 1; 陈林1 ; 李学斌 2; 李月飞 1; 杨新国 1
来源期刊	草业学报
ISSN	1004-5759
出版年	2017
卷号	26 期号:8 页码:24-34
中文摘要	通过对宁夏荒漠草原恢复工程主要植被柠条、沙蒿、短花针茅和蒙古冰草根际与非根际表层(0~5cm)、亚表层(5~10cm)和深层(10~15cm)土壤养分、土壤总碳(soil total organic carbon,C_r)、活性有机碳(active organic carbon,C_A)、碳库指数(carbon pool index,CPI)及碳库管理指数(carbon pool management index,CPMI)特征进行分析研究,探讨不同植被恢复对土壤养分、CPMI变化特征的影响。结果表明:1)4种植被土壤养分均随土壤深度增加呈降低趋势,根际大于非根际,柠条群落根际和非根际表层速效钾(AK)含量高达130.81和111.96mg/kg,相对于亚表层和深层分别高6.87、31.65mg/kg和23.57、61.44mg/kg,随土层深度增加,根际表层,亚表层和深层比非根际土壤分别高18.84、35.55和48.63mg/kg,表现出了荒漠草原特殊的肥岛聚集效应,不同群落间差异显著(P<0.05);2)4种植被类型土壤总有机碳C_r含量在2.09~17.11g/kg范围内,土壤碳库管理指数CPMI均表现为根际大于非根际,C_r和C_A含量在土壤垂直剖面中的分布相似,具有一定的聚表效应,柠条和蒙古冰草群落表层比亚表层碳库活度分别增加了38.41%和29.54%,不同植被类型之间碳库活度表现为蒙古冰草>沙蒿>柠条>短花针茅,植被恢复显著改善了土壤有机质分布状况和土壤碳库质量,明显增强荒漠草原土壤碳汇功能;3)荒漠草原土壤CPMI与土壤养分含量显著相关(P<0.05),pH与C_r、C_A、CPI和CPMI呈显著负相关(P<0.05),相关系数分别为-0.661、-0.437、-0.661和-0.410,与其他土壤养分指标呈显著或极显著正相关(P<0.05;P< 0.01),土壤氮(N)、磷(P)、钾(K)促进了土壤碳库循环周转速率,显著提高土壤质量和生产力。CPMI能够用来作为评价土壤质量和土壤管理措施的有效指标。
英文摘要	The main plant species used in the Ningxia Desert Grassland Vegetation Restoration Project are Caragana korshinskii,Artemisia ordosica,Stipa breviflora,and Agropyron mongolicum.The aim of this study was to explore the effects of different types of vegetation restoration on soil nutrients and carbon pool management index(CPMI)characteristics.We collected rhizosphere and non-rhizosphere soil from the surface(0-5 cm),subsurface(5-10cm),and deep(10-15cm)soil layers,and determined soil total carbon(C_r),active organic carbon(C_A),carbon pool index(CPI)and CPMI.For all four plant species,soil nutrients decreased with increasing soil depth,and these decreases were greater in the rhizosphere soil than in the non-rhizosphere soil.The content of available potassium (AK)in the rhizosphere and non-rhizosphere of the C.korshinskii community was 130.81 and 111.96mg/kg,respectively.The soil AK content showed afat islandaggregation effect on the desert steppe,and showed significant differences among the different communities(P< 0.05).2)The total organic carbon content in soil ranged from 2.09 to 17.11g/kg,and was higher in the rhizosphere soil than in the non-rhizosphere soil.The vertical distributions of C_r and C_A in the soil profile were similar,and showed apoly tableeffect.The carbon pool activity in the surface layer of the C.korshinskii and A.mongolicumcommunity was 38.41%and 29.54% higher,respectively,than that in the deep layer. The four vegetation types could be ranked,from highest carbon pool activity to lowest,as follows:A.mongolicum> A.ordosica>C.korshinskii>S.breviflora.Vegetation restoration significantly improved the distribution of soil organic matter and the quality of the soil carbon pool,and increased the soil carbon sink function of the desert grassland.3)The soil CPMI was significantly correlated with soil nutrient content in the desert grassland,and pH was negatively correlated with C_r,C_A,CPI,and CPMI(correlation coefficients of-0.661, -0.437,-0.661,and-0.410,respectively).The soil CPMI was significantly or extremely significantly positively correlated with other soil nutrients(P<0.05;P<0.01).Higher soil N,P,and K contents promoted the soil carbon pool turnover rate,and significantly improved soil quality and productivity.These results show that CPMI serves as an effective index when evaluating soil quality and soil management practices.
中文关键词	荒漠草原 ; 根际与非根际土壤 ; 土壤养分 ; 碳库管理指数
英文关键词	desert grassland rhizosphere and non-rhizosphere soil soil nutrients carbon pool management index
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6070781
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/2XILL650/235701
作者单位	1.宁夏大学,西部生态与生物资源开发联合研究中心, 西北退化生态系统恢复与重建教育部重点实验室;;西北土地退化与生态恢复宁夏省部共建国家重点实验室培育基地, 银川, 宁夏 750021, 中国; 2.宁夏大学科学技术处, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	张义凡,陈林,李学斌,等. 不同荒漠草原植被根际与非根际土壤养分及碳库管理指数特征[J]. 宁夏大学,2017,26(8):24-34.
APA	张义凡,陈林,李学斌,李月飞,&杨新国.(2017).不同荒漠草原植被根际与非根际土壤养分及碳库管理指数特征.草业学报,26(8),24-34.
MLA	张义凡,et al."不同荒漠草原植被根际与非根际土壤养分及碳库管理指数特征".草业学报 26.8(2017):24-34.