论文部分内容阅读
以内江师范学院校园绿地(林地、草地、灌丛)土壤作为研究材料,周边农耕地作为对照,通过对土壤容重、土壤机械组成、>0.25mm干筛团聚体含量、土壤崩解速率、土壤抗蚀指数(S)、土壤水稳性指数(K)等指标的测定和分析,研究了校园绿地土壤的抗蚀性能.结果表明,校园不同绿地土壤的机械组成差异显著,物理性粘粒含量灌丛>林地>耕地>草地,砂粒含量草地>灌丛>耕地>林地;不同绿地土壤干筛团聚体组成差异极显著;土壤崩解速率总体上表现为灌丛<林地<草地<耕地,且灌丛、林地、草地的静水崩解率在垂直方向上增大,而耕地相反;水稳性指数总体表现为灌丛>林地>草地>耕地,垂直方向上,耕地K值减小,其它绿地K值均增加.因此认为,校园不同绿地土壤的抗蚀性由强到弱依次为灌丛>林地>草地>耕地.基于研究结果,提出了校园土壤的保护建议,为校园绿化提供一定的参考.
With the soil of the campus greenbelts (forestland, grassland and shrub) of Neijiang Normal University as the research material and the surrounding farmland as the control, the soil bulk density, the soil mechanical composition, the aggregate content> 0.25mm dry sieve, the soil disintegration rate, Corrosion index (S), soil water stability index (K), etc. The results show that there are significant differences in the mechanical composition of the soils in the campus green space, The results showed that there was a significant difference in the composition of dry-sieved aggregates in different greenbelt soil. The overall rate of soil disintegration was shrub land grassland> grassland. In the vertical direction, the K value decreased, Therefore, it is considered that the corrosion resistance of different green land soils in order from strong to weak are shrubs> woodland> grassland> arable land.According to the research results, suggestions for the protection of campus soil are put forward, which will provide reference for campus greening.