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滇池柴河流域不同土地利用方式土壤养分剖面分异 被引量:12

Effects of Different Land Uses on Profile Variability of Soil Nutrients in Chaihe Basin of Dianchi Lake
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摘要 基于滇池柴河流域土壤采样,研究了平坦设施农业、平坦传统农业、坡耕地、撂荒地和林地5种土地利用方式0—100cm土壤养分剖面的分异特征,结果表明:(1)不同土地利用方式土壤0—100cm内TN含量排序为:设施农业>传统农业>撂荒地>坡耕地>林地,并且设施农业TN含量显著高于坡耕地和林地(P<0.05)。不同土地利用方式间土壤TN含量的显著差异主要表现在0—80cm。土壤TN含量沿土层自上而下逐层降低,但在不同土地利用方式下,各土层间的差异不一致。(2)不同土地利用方式土壤0—100cm内TP含量排序为:传统农业>设施农业>坡耕地>林地>撂荒地,且不同土地利用方式间各个土层内土壤TP均无显著性差异。5个土层TP均表现为撂荒地<林地<耕作土壤。土壤TP沿土层自上而下总体先降后升,但不同土地利用方式土壤TP随土层的变化趋势不尽一致。(3)不同土地利用方式土壤0—100cm内有机质含量排序为:设施农业>传统农业>撂荒地>坡耕地>林地,且设施农业有机质含量明显高于坡耕地和林地。在5个土层内,不同土地利用方式间土壤有机质差异不显著,只在20—40cm土层内设施农业与坡耕地、林地之间达到显著性差异。土壤有机质含量沿土层自上而下逐层降低,但在不同土地利用方式下,各土层间的显著性差异不一致。 The vertical distributions of soil nutrients in the profile of 0--100 cm depth under different land uses such as flat facility agriculture, flat traditional agriculture, slop land, abandoned land and woodlands in the Chaihe Basin of Dianchi Lake were investigated, and the effect of different land uses on nutrient distribu- tion was discussed. The results indicated that: (1) the rank order of total nitrogen (TN) contents in the soils of 0--100 cm depth for different land uses was facility agriculture〉traditional agriculture〉abandoned land〉slop land〉woodland, and the TN concentrations in the soil with facility agriculture were significantly higher than these in slope land and woodland (P〈0.05). The distribution of TN contents showed significant difference primarily in the depth of 0--80 cm. The TN contents decreased from top to bottom in the soil pro- file. However, it has significant differences between different soil layers for different land uses (2) the contents of soil total phosphorus (TP) in the depth of 0--100 cm for different land uses followed the order of traditional agriculture〉faeility agriculture〉slope land〉woodland〉abandoned land, and it didn't show sig- nificant difference in the depth of 0--100 cm. The contents of soil TP at five soil layers followed the order of abandoned land%woodland%cultivated land. The contents of soil TP firstly decreased and then increased from top to bottom in the soil profile, but it showed a difference for different land uses (3) the contents of soil organic matter (SOM) in the depth of 0--100 cm for different land uses follow the order of facility agriculture)traditional agriculture^abandoned land)slop land)woodland, and the SOM in the facility agricul- ture is significantly higher than these in the slop land and woodland. It didn't show significant difference be- tween land uses in five soil layers but for the difference between facility agriculture and slop land or woodland in the depth of 20--40 cm. The content
出处 《水土保持研究》 CSCD 北大核心 2012年第5期95-99,共5页 Research of Soil and Water Conservation
基金 国家水专项"滇池流域水污染治理及湖泊富营养化综合控制技术与示范"(2009ZX07102-4)
关键词 土地利用方式 土壤养分 垂直分布 柴河流域 land use soil nutrient vertical distribution Chaihe Basin
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