多花木蓝与狗牙根不同种植模式对三峡黄棕壤抗蚀性影响
发布时间：2019-06-25 20:42
【摘要】：通过静水崩解试验及对土壤各抗蚀性指标的探索研究,分析了三峡库区黄棕壤在多花木蓝和狗牙根不同种植模式下的抗蚀性。结果表明:(1)静水崩解过程中,土壤崩解速率表现为空白地多花木蓝狗牙根混播;较空白地土壤,有根试样土壤其崩解速率有很大的减缓,其中混播效果最好,且根系各密度指标与抗蚀性增强值均表现为显著线性相关。(2)与空白地相比,不同种植模式下,土壤水稳性团聚体含量、平均重量直径、有机质含量、团聚状况、团聚度、土壤黏粒含量均有明显的提高,而结构破坏率、分散率则明显下降。(3)通过主成分分析表明:以0.25mm湿筛团聚体含量、结构破坏率、团聚状况、分散率、有机质为指标能较好地衡量黄棕壤在植被恢复下土壤抗蚀性能。
[Abstract]:Based on the static water disintegration test and the exploration of soil corrosion resistance indexes, the corrosion resistance of yellow brown soil in the three Gorges Reservoir area under different planting patterns of multi-flower blue and dog root was analyzed. The results showed that: (1) in the process of static water disintegration, the soil disintegration rate was mixed with flowers and blue dogs and roots in the blank area, and the results showed that: (1) in the process of hydrostatic disintegration, the soil disintegration rate was mixed with flowers and blue dogs; Compared with the blank soil, the disintegration rate of the rooted sample soil was greatly slowed down, among which the mixed sowing effect was the best, and the root density index showed a significant linear correlation with the corrosion resistance enhancement value. (2) compared with the blank soil, the soil water stable aggregates content, average weight diameter, organic matter content, agglomeration status, agglomeration degree and soil clay content were significantly increased, while the structural failure rate was significantly increased under different planting patterns. (2) compared with the blank soil, the soil water stable aggregates content, average weight diameter, organic matter content, agglomeration status, agglomeration degree and soil clay content were significantly increased. The dispersion rate decreased obviously. (3) Principal component analysis showed that the soil erosion resistance of yellow brown soil under vegetation restoration could be well measured by using the content of 0.25mm wet screen aggregates, structural failure rate, agglomeration status, dispersion rate and organic matter as indexes.
【作者单位】： 三峡大学三峡库区生态环境教育部工程研究中心;三峡大学土木与建筑学院;
【基金】：国家自然科学基金(41002100,41202250) 三峡库区生态环境教育部工程中心2016年度开放基金(KF2016-06)
【分类号】：S157.43
本文编号：2505988
[Abstract]:Based on the static water disintegration test and the exploration of soil corrosion resistance indexes, the corrosion resistance of yellow brown soil in the three Gorges Reservoir area under different planting patterns of multi-flower blue and dog root was analyzed. The results showed that: (1) in the process of static water disintegration, the soil disintegration rate was mixed with flowers and blue dogs and roots in the blank area, and the results showed that: (1) in the process of hydrostatic disintegration, the soil disintegration rate was mixed with flowers and blue dogs; Compared with the blank soil, the disintegration rate of the rooted sample soil was greatly slowed down, among which the mixed sowing effect was the best, and the root density index showed a significant linear correlation with the corrosion resistance enhancement value. (2) compared with the blank soil, the soil water stable aggregates content, average weight diameter, organic matter content, agglomeration status, agglomeration degree and soil clay content were significantly increased, while the structural failure rate was significantly increased under different planting patterns. (2) compared with the blank soil, the soil water stable aggregates content, average weight diameter, organic matter content, agglomeration status, agglomeration degree and soil clay content were significantly increased. The dispersion rate decreased obviously. (3) Principal component analysis showed that the soil erosion resistance of yellow brown soil under vegetation restoration could be well measured by using the content of 0.25mm wet screen aggregates, structural failure rate, agglomeration status, dispersion rate and organic matter as indexes.
【作者单位】： 三峡大学三峡库区生态环境教育部工程研究中心;三峡大学土木与建筑学院;
【基金】：国家自然科学基金(41002100,41202250) 三峡库区生态环境教育部工程中心2016年度开放基金(KF2016-06)
【分类号】：S157.43
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1 李维俊,李昌桂,洪齐;多花木蓝的驯化栽培及应用技术[J];湖北畜牧兽医;2000年06期
，本文编号：2505988
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