Effect of Tobacco Long-continuous Croping on Character of Soil Humus in Gully Region of Loess Plateau

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Effect of Tobacco Long-continuous Croping on Character of Soil Humus in Gully Region of Loess Plateau

更新时间：2024-11-07

- Effect of Tobacco Long-continuous Croping on Character of Soil Humus in Gully Region of Loess Plateau
- Issue 6, Pages: 126-129(2007)
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- Published：2007
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Effect of Tobacco Long-continuous Croping on Character of Soil Humus in Gully Region of Loess Plateau[J]. 2007, (6): 126-129.
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Effect of Tobacco Long-continuous Croping on Character of Soil Humus in Gully Region of Loess Plateau[J]. 2007, (6): 126-129. DOI：

摘要

综合研究了陇东黄土高原黑垆土不同烟草种植年限土壤的有机质含量、腐殖质组成、形态及胡敏酸的色调系数、相对色度等

结果表明 30～70 cm土层土壤有机质含量演化随烟草种植年限的增加表现出降低的特征最为明显

土壤表层的有机碳与胡敏酸含量则呈正相关

连作23年的胡敏酸最低.烟草连作1～8年的土壤HA/FA比值均大于1

0～30 cm土层HA/FA比值为1年烟草＞5年烟草＞农田＞8年烟草＞23年烟草.农田和种植烟草1年的表层腐殖质含量以松结态＞稳结态

连作5年至23年表层腐殖质含量则为稳结态＞松结态.烟草连作各层土壤的相对色度(RF)在0～30 cm

50～70 cm土层随烟草连作年限呈显著的降低趋势

30～50 cm土层种植烟草1～8年呈升高趋势

8年后则呈降低趋势.但各层总趋势基本呈0～30 cm＜30～50 cm＜50～70 cm.HA的色调系数(ΔlogK)30～50 cm变化较小

各土层变化趋势与RF相反但结果一致.与对照比较

烟草连作1～8年可提高或保持胡敏酸氧化和芳化程度.

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