干旱区生态环境知识资源中心(Arid): 宁夏东部荒漠草原灌丛引入过程中土壤呼吸响应特征

Arid

	宁夏东部荒漠草原灌丛引入过程中土壤呼吸响应特征
其他题名	Responses of soil respiration to shrub introduction in the desert steppe of the eastern Ningxia
	郭天斗 1; 赵亚楠 1; 周玉蓉 1; 王红梅 2
来源期刊	草业科学
ISSN	1001-0629
出版年	2019
卷号	36 期号:12 页码:3052-3064
中文摘要	为探究宁夏东部荒漠草原灌丛引入过程中土壤呼吸响应特征,选取封育草地、放牧地及不同灌丛年限(22、 12、3年)和间距(40、6、2 m)的柠条灌丛地(Caragana korshinskii),开展草原-放牧-灌丛引入中土壤呼吸、水分、碳氮、微生物及相关研究。结果表明:0 - 10 cm土层土壤水分具有明显季节变化,灌丛引入加剧深层土壤水分消耗。土壤呼吸响应表层土壤水分的季节变化,灌丛引入后土壤呼吸减弱,不同年限灌丛地与封育、放牧草地无显著差异(P > 0.05),但随间距的缩小差异显著(P < 0.05)。土壤有机碳在封育、放牧草地随土层加深而降低,且随着灌丛年限的增大和间距的缩小而降低;全氮在封育草地都较高,而放牧地含量较低,随着灌丛年限的增大和间距的缩小而增加,但差异不明显(P > 0.05)。灌丛引入使各菌群数量显著增加(P < 0.05),但在间距最小(2 m)时显著降低。随着灌丛引入土壤微生物量碳降低,且随年限增长而增加,而在生长到一定年限又随间距的缩小而降低;土壤呼吸熵(qCO_2)随年限的增加而减小,随间距的缩小而增大。土壤呼吸与土壤水分、土壤微生物量碳正相关,且与土壤水分极显著正相关(P < 0.01),与土壤有机碳、全氮、微生物数量负相关,其与放线菌数量显著负相关(P < 0.05)。
英文摘要	We aimed to study the responses of soil respiration to shrub introduction in the desert steppe of eastern Ningxia. We selected an enclosed grassland, grazing grassland, and Caragana korshinskii shrubland of different shrub years (22, 12, 3 a) and intervals (40, 6, 2 m) to study the association between soil respiration, moisture, carbon, nitrogen, and microorganisms during grassland grazing and shrub introduction. The results showed that the soil's moisture in 0 - 10 cm layer had obvious seasonal dynamics, and the introduction of shrubs could consumed much more water in deeper soil. The seasonal changes of soil respiration had correspondence with surface soil moisture. Soil respiration decreased after the introduction of shrubs, and there was no significant difference in different shrub years between the enclosed and grazing grassland, but there were significant differences with the decrease of intervals. Soil 's organic carbon decreased with the deeper soil layer, which decreased with the increasing shrub year and decreasing shrub interval. Soil 's total nitrogen in enclosed grassland was higher than that in shrublands, while that of grazing grassland was comparatively lower. The total nitrogen content increased with increasing shrub year and decreasing shrub interval, but there was no significant difference (P > 0.05). The introduction of shrubs caused significant increase in the number of each microbial community (P < 0.05), but significantly decreased when the planting intervals are 2 m. After the introduction of shrubs, the quantity of microorganisms significantly increased, but significantly decreased with the high density. Soil's microbial biomass carbon decreased with the introduction of shrubs and increased with the growth of years and reduced with the decreasing shrub interval after growth in certain years. The qCO_2 level decreased with the extension of years and increased with the decrease of intervals. Soil respiration was positively correlated with soil moisture and soil microbial carbon quantity. Soil respiration had significant positive correlation with soil moisture (P < 0.01), negative correlation with soil organic carbon, total nitrogen, and microbial quantity, and the differences significantly negatively correlated between soil respiration and actinomycetes (P < 0.05).
中文关键词	荒漠草原 ; 灌丛引入 ; 土壤呼吸 ; 土壤水分 ; 土壤碳氮 ; 土壤微生物
英文关键词	desert grassland shrub introduction soil respiration soil moisture soil carbon and nitrogen soil microorganism
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6632520
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/2XILL650/316096
作者单位	1.宁夏大学农学院, 银川, 宁夏 750021, 中国; 2.宁夏大学农学院;;西北退化生态系统恢复与重建教育部重点实验室, ;;西北退化生态系统恢复与重建教育部重点实验室, 银川;;银川, 宁夏;;宁夏 750021;;750021, 中国
推荐引用方式 GB/T 7714	郭天斗,赵亚楠,周玉蓉,等. 宁夏东部荒漠草原灌丛引入过程中土壤呼吸响应特征[J]. 宁夏大学,2019,36(12):3052-3064.
APA	郭天斗,赵亚楠,周玉蓉,&王红梅.(2019).宁夏东部荒漠草原灌丛引入过程中土壤呼吸响应特征.草业科学,36(12),3052-3064.
MLA	郭天斗,et al."宁夏东部荒漠草原灌丛引入过程中土壤呼吸响应特征".草业科学 36.12(2019):3052-3064.