干旱区生态环境知识资源中心(Arid): 塔里木沙漠公路防护林土壤团聚体特征

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	塔里木沙漠公路防护林土壤团聚体特征
其他题名	Study on Soil Aggregates of the Desert Highway Shelterbelt in Tarim
	沈芳宇 1; 王永东 1; 李生宇1 ; 徐新文1 ; 赵容怀 2; 贾萌萌 1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2015
卷号	32 期号:5 页码:910-917
中文摘要	通过野外采样与室内分析相结合的方法,对塔里木沙漠公路5个不同种植年限防护林0~20 cm土层土壤团聚体的组成及稳定性进行了研究。结果表明:1干筛处理下,各土层>0.25 mm风干团聚体含量在33.35~280.48 g?kg~(-1),其中>5 mm粒级在土壤风干团聚体占主导地位,其含量占41.56%~70.09%;5~2 mm粒级次之,占6.58%~34.88%;1~0.5 mm粒级含量最少,仅为1.66%~5.46%。湿筛处理下,各土层>0.25 mm水稳性团聚体含量在0.21~72.54 g?kg~(-1),不同粒级含量占水稳性团聚体总量的比例基本随粒径的减小而降低。2在0~20 cm土层中,流沙地没有形成团聚体,但随着种植年限从7 a增加到18 a,土壤风干团聚体含量从69.94g?kg~(-1)增加到159.88 g?kg~(-1),水稳性团聚体含量从0.41 g?kg~(-1)增加到60.84 g?kg~(-1),防护林的种植促进了流动风沙土的成土过程。3随种植年限的增加,>0.25 mm风干/水稳性团聚体含量[SDA/WSA_((>0.25 mm))]、平均重量直径(MWD)和几何平均直径(GMD)都有增加的趋势,且这些指标间的相关性均达到极显著水平(P<0.01)。4可分别用>2 mm风干团聚体含量和>1 mm水稳性团聚体含量来表征防护林土壤团聚体的机械稳定性和水稳定性。防护林的建设有利于流动风沙土地区土壤团聚体的形成,使团聚体在土体内均匀分布,团聚体的机械稳定性和水稳定性得到提高,促进流动风沙土的成土过程。
英文摘要	In order to understand the composition and stability of soil aggregates of Desert Highway shelterbelt in Tarim, soils of 0 - 20 cm in 5 different planting age’s shelterbelt were analyzed through field sampling and laboratory analysis. Dry sieving method and wet sieving method were used in this study. The results showed that: ① Under the condition of dry sieve, the content of > 0.25 mm air drying soil aggregates is between 33.35 - 280.38 g?kg ~(- 1) in different layers,and the > 5 mm aggregate is predominant in different layers,about 41.56% - 70.09%; the 5 - 2 mm aggregate comes second,about 6.58% - 34.88%, the 1 - 0.5 mm aggregate content was the lowest,only 1.66% - 5.46%. Under the condition of wet sieve, the content of > 0.25 mm water-stable aggregates is between 0.21 - 72.54 g?kg ~(- 1) in different layers,and the change of soil aggregates decreased with the decreasing of particle size for all planting age’s shelterbelt. ② With the increasing of shelterbelt planting years, the content of air drying soil aggregates increased from 69.94 g?kg ~(- 1) to 159.88 g?kg ~(- 1),and the content of water-stable aggregates increased from 0.41g?kg ~(- 1) to 60.84 g?kg ~(- 1) in 0 - 20 cm soil layer,while there is no aggregate formation in quicksand. Shelterbelt plantation promoted the formation of aeolian sandy soil. ③ With the increasing of planting years, the content of > 0.25 mm air drying soil aggregates (SDA _(> 0.25 mm)) and water-stable aggregates (WSA _(> 025 mm)),mean weight diameter (MWD) and geometric mean diameter (GMD) of soil aggregates increased,and the correlation between these parameters are significant (P < 0.01). ④ The content of > 2 mm air drying soil aggregates can be used to characterize the mechanical stability of soil aggregates in the shelterbelt soil; and the content of > 1 mm water- stable aggregates can be used to characterize the water-stability of soil aggregates in the shelterbelt soil. Planting shelterbelt on aeolian sandy soil along Tarim Desert Highway could increase the formation of soil aggregates,promote the aggregates to be well-distributed and improve the mechanical stability and water-stability of soil aggregates,and accelerate the soil forming process.
中文关键词	防护林 ; 土壤团聚体 ; 组成 ; 稳定性 ; 塔里木沙漠公路
英文关键词	shelterbelt soil aggregates composition stability Tarim Desert highway
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5518749
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232741
作者单位	1.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国; 2.中国石油天然气股份有限公司塔里木油田分公司, 库尔勒, 新疆 841000, 中国
推荐引用方式 GB/T 7714	沈芳宇,王永东,李生宇,等. 塔里木沙漠公路防护林土壤团聚体特征[J]. 中国科学院新疆生态与地理研究所,2015,32(5):910-917.
APA	沈芳宇,王永东,李生宇,徐新文,赵容怀,&贾萌萌.(2015).塔里木沙漠公路防护林土壤团聚体特征.干旱区研究,32(5),910-917.
MLA	沈芳宇,et al."塔里木沙漠公路防护林土壤团聚体特征".干旱区研究 32.5(2015):910-917.