Spatial dependence of soil enzyme activities along a slope
Spatial dependence of soil enzyme activities along a slope
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DOI：
10.2136/sssaj1998.03615995006200050022x
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发表时间：
1998-09-01
影响因子：
2.9
通讯作者：
King, DJ
中科院分区：
文献类型：
--
作者：
Bergstrom, DW;Monreal, CM;King, DJ
本研究测量了灰褐色陆visol （Hapludalf）土壤酶活性和其他特性的空间依赖性，土壤样品采集于大豆收获后沿坡74个位置[Glycine max (L.)]稳定。和秋季耕作。测定的参数包括脱氢酶、脲酶、谷氨酰胺酶、磷酸酶、芳基磺化酶和β -葡萄糖苷酶的活性；水、有机碳（OC）、无机氮和无机磷含量；土壤有机质轻组分；和Ap地平线的深度。等级相关表明，水分与脱氢酶、脲酶、谷氨酰胺酶、磷酸酶和芳基磺化酶活性之间存在显著相关关系，水分与OC含量、Ap层深、含水量和芳基磺化酶活性之间存在较强的空间依赖性；有机磷和无机磷含量及磷酸酶活性具有一定的空间依赖性。其他属性表现出很少或没有空间依赖性。有机磷层深、无机磷含量和磷酸酶活性的空间依赖性范围相似（约为20 m），芳基磺化酶活性的空间依赖性范围为16 m，而有机碳含量的空间依赖性范围为32 m，相对较长的水分含量范围（98 m）受沿坡趋势的影响。土壤水分和有机碳含量、磷酸酶和芳基磺化酶活性在坡面分布具有相似的空间格局，这些特征在坡面中部和上部最小，在坡脚处最大。沿坡空间格局的相似性被解释为水或OC含量对该尺度上磷酸酶和芳基磺化酶数量影响的证据。
This study measured the spatial dependence of soil enzyme activities and other properties of the Ap horizon in a Gray Brown Luvisol (Hapludalf), Soil samples were collected at 74 positions along a slope following harvest of soybean [Glycine max (L.) Merr.] and fall tillage. Parameters measured were activity of dehydrogenase, urease, glutaminase, phosphatase, arylsulfatase, and beta-glucosidase; water, organic carbon (OC), mineral N, and inorganic P contents; the light fraction of soil organic matter; and depth of the Ap horizon. Rank correlation indicated significant relationships between water and dehydrogenase, urease, glutaminase, phosphatase, and arylsulfatase activities, and between water and OC content, Depth of the Ap horizon, water content, and arylsulfatase activity were strongly spatially dependent; OC and inorganic P contents and phosphatase activity were moderately spatially dependent. Other properties showed little or no spatial dependence. re ranges of spatial dependence were similar for depth of the Ap horizon, inorganic: P content, and phosphatase activity (approximate to 20 m), The range for arylsulfatase activity was 16 m, while that of OC content was 32 m, The relatively long range estimate for water content (98 m) was influenced by a trend along the slope. Maps of water and OC contents and phosphatase and arylsulfatase activities indicated similar spatial patterns along the slope, The magnitude of these soil properties was minimal in the middle or upper portion of the slope, and maximal at the footslope. Similarity in spatial patterns along the slope was interpreted as evidence for influence of water or OC content on amounts of phosphatase and arylsulfatase at that scale.