干旱区生态环境知识资源中心(Arid): 绿洲化过程中农田土壤粒径分布性质变化

Arid

	绿洲化过程中农田土壤粒径分布性质变化
其他题名	Changes of Farmland Soil Particle in Process of Oasification
	桂东伟 1; 雷加强1 ; 曾凡江1 ; 李开封 1; 代述勇 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2010
卷号	30 期号:6 页码:1354-1361
中文摘要	绿洲化与荒漠化同为干旱区基本地理过程,揭示这些过程中土壤环境变异特点成为干旱区环境研究中的热点.本研究从绿洲化视角出发,以近年来绿洲扩张进程明显,常年受风蚀影响严重的塔里木盆地南缘策勒绿洲为研究区,着重探讨绿洲化过程中主要土地利用方式农田在4种典型不同利用强度下,其表层土壤粒径分布(soil particle size distribution,简称PSD)特性的变化特征,同时对土壤有机质等7项养分指标变化也进行分析.土壤PSD体积分形维数分析结果表明,不同利用强度农田土壤PSD存在显著性差异,位于绿洲内部的传统耕作农田土壤PSD分维值显著位于最高水平;而位于荒漠-绿洲交错带垦殖农田,其土壤PSD变化受肥力投入等人为因素影响明显,其中无肥力投入的临时性垦殖农田土壤PSD甚至低于自然覆被样地而显著位于最低水平.而各农田间土壤养分指标也总体上存在显著性差异,且变化趋势同PSD相似,其中土壤有机质等5项指标同PSD之间存在显著正相关,同时基于各养分指标得出的综合指数也同土壤PSD之间存在显著正相关,反映出绿洲化过程中土壤PSD研究的明确生态意义
英文摘要	Oasification and desertification are the basic geographical processes in arid area. The Cele oasis in Xinjiang,in which oasis expanded obviously in recent years and serious wind erosion affected perennially, was selected as study area to study the regional variations of soil particle distribution(PSD)in farmland with four typical utilization intensities. Meantime, the seven soil nutrient properties such as organic matter were analyzed. The analysis of volume fractal dimension of soil PSD indicated that soil PSD was significant different between farmlands with different utilization intensities. The soil PSD of farmland located on oasis interior was significantly in the highest level, and because the soil PSD of farmland located on desert-oasis ecotone was obviously affected by human factors such as the manure input etc, the soil PSD of farmland without manure input was in the lowest level and even lower than plots covered with nature plant. The soil nutrient properties were also significant different between farmlands, and their changes trend were similar with the PSD.The five soil properties were significantly positively correlated with PSD, and the synthesis index calculated from soil nutrient properties were also significantly positively correlated with PSD. This showed that studying soil PSD during oasification had a specific meaning
中文关键词	绿洲化 ; 农田 ; 土壤粒径分布 ; 分维 ; 策勒
英文关键词	oasification soil particle distribution fractal dimension farmland Cele
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:4062780
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/2XILL650/226043
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 830001, 中国; 2.新疆策勒荒漠草地生态系统国家野外科学观测研究站, 策勒, 新疆 848300, 中国
推荐引用方式 GB/T 7714	桂东伟,雷加强,曾凡江,等. 绿洲化过程中农田土壤粒径分布性质变化[J]. 中国科学院新疆生态与地理研究所,2010,30(6):1354-1361.
APA	桂东伟,雷加强,曾凡江,李开封,&代述勇.(2010).绿洲化过程中农田土壤粒径分布性质变化.中国沙漠,30(6),1354-1361.
MLA	桂东伟,et al."绿洲化过程中农田土壤粒径分布性质变化".中国沙漠 30.6(2010):1354-1361.