子午岭連家砭地区土壤物理性质与土壤抗侵蚀性能指标的初步研究
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INVESTIGATION ON PHYSICAL PROPERTIES OF SOIL IN RELATION TO THE INDEX OF SOIL RESISTANCE TO EROSION IN THE REGION OF TZIWU-LING, KANSU
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    摘要:

    黄土地区,地形起伏,丘陵沟壑很多。由于长期耕作,植被破坏,致使土壤表层遭受侵触,引起土壤肥力及农业生产下降,故防止土壤侵触是当前增加农业生产的重要措施。

    Abstract:

    In this study the physical properties of surface soil were investigated under diffecent conditions. From the results obtained, we may come to the conclusion that good soil physical properties, which are resistant to soil erosion, are exhibited by high content of organic matter, large quantity of > 0.25 mm total aggregate and 1-10 mm aggregate, and the state and degree of micro-aggregation. We have also studied the twa soil physical constants, dispersion ratio and erosion ratio, which Middleton used to separate erosive from nonerosive soils. The results showed that both ratios increased following the cultivation of grass land, and that the heavier the soil, the smaller the ratios. These findings agree with that of Middleton. However, he used the erosion ratio "10" as a demarcation point between erosive and nonerosive soils. In our study, we found the erosion ratio of the heavy soil, which was the lowest, even reached as high as "19.0". Looking at this, it seems that all soils in this region should be erosive. Hence, further study is needed on the point of demarcation of erosion ratio when used in loess region.

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田积瑩,黄义端.子午岭連家砭地区土壤物理性质与土壤抗侵蚀性能指标的初步研究[J].土壤学报,1964,12(3):286-296. TYAN CHI-YING, HWANG YI-DUAN. INVESTIGATION ON PHYSICAL PROPERTIES OF SOIL IN RELATION TO THE INDEX OF SOIL RESISTANCE TO EROSION IN THE REGION OF TZIWU-LING, KANSU[J]. Acta Pedologica Sinica,1964,12(3):286-296.

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  • 在线发布日期: 2013-02-25
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