丹江中游典型小流域土壤总氮的空间分布

ISWC OpenIR > 水保所知识产出(1956---)

	丹江中游典型小流域土壤总氮的空间分布
其他题名	Spatial Distribution of Soil Total Nitrogen in a Typical
	徐国策; 李占斌; 李鹏; 黄萍萍; 龙菲菲
	2012
发表期刊	地理学报
卷号	67 期号:11 页码:1547-1555
摘要	在丹江鹦鹉沟小流域,利用网格状取样和典型样地取样相结合的方法,进行土样采集,共计采样点268个,测定土壤0～40cm的总氮含量。应用传统统计学和地统计学的方法,对不同深度下土壤总氮含量进行分析。结果表明:土壤总氮含量随土壤深度的增加而降低,不同土层间土壤总氮含量存在显著差异(P<0.01),0～10cm(A1)、10～20cm(A2)和20～40cm(A3)土壤总氮含量平均值分别为0.85、0.47和0.30g/kg。3个土层下,总氮的最优模型均为线性模型,具有中等空间相关性。经Kriging插值分析,不同土层下土壤总氮的空间分布呈带状格局。ANOVA分析表明A1和A2层不同土地利用下土壤总氮含量存在显著差异(P<0.05),不同土层下土壤总氮在不同坡度均存在显著差异(P<0.05)。农地不同土层下土壤总氮含量与海拔、坡度和坡向均呈显著相关性(P<0.01)。研究区0～40cm土壤总氮储量为562.37t,不同土地利用下0～40cm每平方米土壤总氮含量表现为林地>农地>草地,分别为0.343、0.299和0.289kg/m2。更多还原
其他摘要	Field sampling was carried out based on a 100 m × 100 m grid system and typical spot samples. A total of 268 sites were sampled in Yingwugou watershed. The samples were collected in three soil layers at a depth of 0-40 cm. Both traditional and geostatistical methods were applied to analyze total nitrogen in the three different soil depths. The results indicated that the total nitrogen content in the soil profile decreased with the increase of soil depth, and there were significant differences among the three soil layers (P < 0.01). The mean total nitrogen contents in 0-10 m (A1), 10-20 m (A2) and 20-40 cm (A3) were 0.85, 0.47 and 0.30 g/kg, respectively. The best fitted models in the three soil layers were all linear models indicating moderate spatial dependence. The Kriging interpolation showed that the spatial distribution of soil total nitrogen content in different soil layers exhibited ribbon-shaped patterns. The ANOVA showed that the spatial variations of the total nitrogen content for different land use types in A1 and A2 were significant (P < 0.05). The impact of slope on soil total nitrogen content in the three soil depths was significant (P < 0.05). There were significant correlations between the total nitrogen content and elevation, slope and aspect in different soil layers of cropland (P < 0.01). The soil total nitrogen storage in the study are at 0-40 cm was 562.37 t. The total nitrogen contents per square meter at the 0-40 cm soil layer for forestland, cropland and grassland were 0.343, 0.299 and 0.289 kg/m2, respectively
关键词	土壤总氮 Soil Total Nitrogen 地形 Topography 土地利用 Land Use 丹江流域 Danjiang River Watershed
语种	中文
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/5261
专题	水保所知识产出(1956---)
推荐引用方式 GB/T 7714	徐国策,李占斌,李鹏,等. 丹江中游典型小流域土壤总氮的空间分布[J]. 地理学报,2012,67(11):1547-1555.
APA	徐国策,李占斌,李鹏,黄萍萍,&龙菲菲.(2012).丹江中游典型小流域土壤总氮的空间分布.地理学报,67(11),1547-1555.
MLA	徐国策,et al."丹江中游典型小流域土壤总氮的空间分布".地理学报 67.11(2012):1547-1555.

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