【摘要】：通過靜水崩解試驗及對土壤各抗蝕性指標的探索研究,分析了三峽庫區(qū)黃棕壤在多花木藍和狗牙根不同種植模式下的抗蝕性。結(jié)果表明:(1)靜水崩解過程中,土壤崩解速率表現(xiàn)為空白地多花木藍狗牙根混播;較空白地土壤,有根試樣土壤其崩解速率有很大的減緩,其中混播效果最好,且根系各密度指標與抗蝕性增強值均表現(xiàn)為顯著線性相關(guān)。(2)與空白地相比,不同種植模式下,土壤水穩(wěn)性團聚體含量、平均重量直徑、有機質(zhì)含量、團聚狀況、團聚度、土壤黏粒含量均有明顯的提高,而結(jié)構(gòu)破壞率、分散率則明顯下降。(3)通過主成分分析表明:以0.25mm濕篩團聚體含量、結(jié)構(gòu)破壞率、團聚狀況、分散率、有機質(zhì)為指標能較好地衡量黃棕壤在植被恢復(fù)下土壤抗蝕性能。
[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.
【作者單位】： 三峽大學(xué)三峽庫區(qū)生態(tài)環(huán)境教育部工程研究中心;三峽大學(xué)土木與建筑學(xué)院;
【基金】：國家自然科學(xué)基金(41002100,41202250) 三峽庫區(qū)生態(tài)環(huán)境教育部工程中心2016年度開放基金(KF2016-06)
【分類號】：S157.43

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