摘要
土壤资源异质性是荒漠生态系统的一种普遍现象。【目的】探索荒漠灌丛盐生假木贼(Anabasissalsa)的土壤理化性质空间分布特征。【方法】以准噶尔盆地东南缘沙漠戈壁地带的优势种盐生假木贼灌丛为对象,测定距离灌丛中心5cm处、距离灌丛中心10cm处和距离灌丛外缘20cm处的土壤有机质量、土壤全磷量、土壤全氮量、土壤电导率、土壤pH值和土壤含水率,研究了土壤主要理化性状的水平和垂直分布规律。【结果】水平方向上,0~50cm土层,距离灌丛中心5cm处、距离灌丛中心10cm处和灌丛外缘20cm处的土壤有机质量、土壤全氮量、土壤全磷量、土壤电导率、土壤pH值及土壤含水率均无显著差异。垂直方向上,盐生假木贼灌丛周围土壤有机质和土壤全磷量随着土层深度的增加呈减小趋势;土壤全氮量随着土层深度的增加呈先增加后减小的趋势;土壤电导率随着土层深度的增加而增加的分布特征;土壤pH值随着土层深度的增加而减小;土壤含水率随着土层深度的增加呈先增加后减小。【结论】盐生假木贼灌丛的土壤主要理化性质在水平方向没有显著变化,但在垂直方向表现出一定分布特征。
【Objective】Soil is heterogenous and its physical and chemical properties vary spatiotemporally. The purpose of this paper is to present the results of an experimental study on the physical and chemical properties of soil in Anabasis salsa in Gobi region at the southeastern edge of Junggar basin.【Method】We measured organic matter, total phosphorus, total nitrogen, electrical conductivity, pH and water content in soil at locations 5 cm and 10 cm from the center of shrubs, and 20 cm from the outer edge of shrubs.【Result】In horizonal direction, there was no significant difference in organic matter, total nitrogen, total phosphorus, electrical conductivity, pH and water content in the 0~50 cm soil at all locations. In vertical direction, the organic matter and total phosphorus in the proximity of the Anabasis salsa decreased monotonically along the soil profile, while the total nitrogen increased first with the depth followed by a decrease. Both electrical conductivity and pH increased with depth, and soil moisture peaked somewhere within the soil profile.【Conclusion】Our results showed that the physical and chemical properties of soil in Anabasis salsa did not show significant change in lateral direction but varied erratically in the vertical direction.
作者
麦尔哈巴·尼加提
戴岳
师庆东
肖合来提·巴义
彭丽萍
尼加提·卡斯木
MARHABA·Nijat;DAI Yue;SHI Qingdong;XIAO Helaiti·Bayi;PENG Liping;Nijat·Kasim(College of Resource and Enviromental Sciences, Xingjiang University, Urumqi 830046, China;Xingjiang University Key Laboratory of Oasis Ecology, Urumqi 830046, China;Xingjiang University Institute of Arid Ecology and Environment, Urumqi 830046, China)
出处
《灌溉排水学报》
CSCD
北大核心
2019年第7期38-44,共7页
Journal of Irrigation and Drainage
基金
自治区科学自然基金项目(2018D01C049)
关键词
盐生假木贼
土壤理化性质
空间分布
水平方向
垂直方向
Anabasis salsa
physical and chemical properties of soil
spatial distribution
horizontal direction
vertical direction
