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中国西部环境和生态科学研究计划 >
2005年资助项目 >
中国西部干旱半干旱区全新世气候变化的集成研究 >
科学论文 >
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http://hdl.handle.net/2239/46593
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| Title: | 干旱荒漠区污水灌溉山地园林土壤养分的空间变异特征 |
| Other Titles: | Spatial Variability Characteristics of Soil Nutrients in Wastewater Irrigated Mountain Garden in Arid Desert Area |
| Authors: | Zhang, Huiwen(张慧文)
Sun, Tao(孙涛)
Zhang, Ziwen(张自文)
Ma, Jianying(马剑英)
Chen, Fahu(陈发虎)
Lv, Guanghui(吕光辉) |
| Keywords: | 污水灌溉（wastewater irrigation）
土壤养分（soil nutrients）
地统计学（geostatistics）
空间变异（spatial variability）
克立格插值（kriging） |
| Issue Date: | 2009 |
| Publisher: | 《农业环境科学学报》2009，28（6）：1164-1171. |
| Abstract: | [中文摘要]：以乌鲁木齐市雅玛里克山污水灌溉区为例，采用地统计学方法研究了干旱荒漠区山地园林污灌区土壤中的6种土壤养分指标全N、全P、全K、速效N、速效P、速效K的空间变异特征。结果表明，6种土壤养分指标的变异系数在8.34%～39.68%之间，全N、全P、速效P服从正态分布，全K、速效N、速效K服从对数正态分布。所有养分的块金值与基台值之比都在25%以下，说明结构性因素控制这些养分的含量分布，导致样点之间的空间自相关作用强。土壤养分的相关距变化范围为19.1～116.7 m。因为灌溉污水的影响，强矿化作用使得全N、速效N在质地粗轻的山坡含量较高，而氨挥发则造成全N、速效N在质地细重的谷地含量较低，偏弱碱性的污水加剧了P的固定，使研究区内全P、速效P含量整体偏低，但同时偏弱碱性的污水促进了K的释放，使速效K含量明显提高。污灌能促进速效养分的释放，使养分之间具有一定相关关系。
[英文摘要]：Yamalie mountain in the northwest of Urumqi, is a typical arid desert area of West China. Now the Yamalic mountain garden building was not only the national landscaping demonstrative base, but also the demonstrative project to restore the ecological environlnent of Xinjiang. It was the first time to afforest the ban＇en hill with the secondary treated urban wastewater in Xinjiang. This project would not only supply Yamalie mountain with reliable and stable water resources, but also create an effective way to reclaim urban wastewater in this arid desert area of West China. Understanding the spatial variation and distribution pattern of soil nutrients in wastewater irrigated regions is needed in order to provide a scientific basis for developing rational wastewater irrigation methods. Based on local landforms, 61 soil samples (0-20 cm)were collected, and six soil nutrients including total nitrogen (TN), total phosphorus (TP), total potassium (TK), available nitrogen (AN), available phosphorus (AP) and available potassium (AK) were measured. Geostatistical and GIS techniques were used to analyze the spatial variability of soil nutrients in this region. The statistical characteristics of data were analyzed using SPSS 16.0, the procession of semivariograms calculation and theoretical models fitting were done by GS＋5.3, and the spatial distribution map of all soil nutrients was created using ordinary Kriging methods, ArcGIS9.2. Traditional statistical analysis (descriptive statistics) showed the coefficients of variation for all soil nutrients ranged from 8.34% to 39.68%. All soil nutrients belonged to medium variation except that TK belonged to weak variation. TN, TP and AP showed a normal distribution, while TK, AN and AK showed a lognormal distribution. The ratios of nugget to sill for the six soil nutrients were all under 25%, indicating that the spatial correlations were all strongly spatially dependent and their spatial heterogeneity was mainly caused by structural factors. The range of spatial correlation distance for all soil nutrients was between 19.1 m and 116.7 m. The above results showed that wastewater irrigation could not strongly influence the spatial correlations and could not improve the content of soil nutrients in a short period in the study area. The content of TN and AN were higher on the hillside because of strong mineralization and lower in the valley because of ammoniacal volatilization, which was caused by wastewater irrigation. The fixation of phosphorus occurred because of slightly alkaline wastewater irrigation. Therefore, the content of TP and AP were low in the whole study area. At the same time, slightly alkaline wastewater could accelerate the freeing of potassium, after which the content of AK rose noticeably. There were certain correlations between nutrients because the wastewater could release its available nutrients. |
| Description: | 作者简介：张慧文（1978—），女，甘肃兰州人，博士生，主要研究方向为干旱区环境变化和环境科学。
通讯作者：陈发虎 E—mail：fhchen@lzu．edu．cn |
| URI: | http://hdl.handle.net/2239/46593 |
| Appears in Collections: | 科学论文
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