| Tourism not only promoted the rapid development of the domestic economy and the improvement of the local people's living standards,but also the inevitable requirement of building a well-off society in China.In the full layout of the scenic area,we should strengthen the development of their own soft power that the unique culture of the scenic area and then create a suitable for the healthy development of tourists,the cultural atmosphere and the natural environment.However,due to the rising trend of tourism development,in the development process to bring the scenic green belt pollution and the destruction of the natural environment of the scenic area is also increasing.Soil is one of the most important environmental factors in tourism activities,and it is also the most sensitive environmental factor to the impact of tourism disturbance.Scenic soil quality is good or bad to a certain extent,through different ways to the health of tourists caused a certain threat.Studying the negative impact of tourism on the ecological environment and then seeking its repair and solve the countermeasures has become one of the focuses of today's environment and tourism research.In Hongdong big pagoda tree scenic spot as the study area,the data were collected in the study area,collection and laboratory tests of soil samples,the data obtained on the physicochemical properties and the contents of heavy metals in soils in the study area,draw out the content and distribution of heavy metal content in the physicochemical properties of the soils of the study area to explore the impact of space.Human activities on the soil area,and use the principal component analysis of the fertility of the greenbelt in the three areas of the immigration area,the ancestral area and the folk area.The comprehensive evaluation of the heavy metal pollution in the three areas of the study area was carried out by using the pollution index evaluation method,namely the single factor index evaluation method and the Nemero index evaluation method.The main results are as follows:(1)The soil pH of the three areas of the immigrant area,the ancestral area and the folk area in the study area showed a tendency to decrease gradually from near to far,and the soil pH value in the folk area was Higher than the immigrant area and ancestral area.The content of soil organic matter,alkali-hydrolyzable nitrogen,available phosphorus and available potassium in the three areas of the immigrant area,the ancestral area and the folk area showed the trend of increasing from the main route from near to far.(2)The distribution of the remaining elements in the study area except the soil pH value was obvious,indicating that it was disturbed by human activities.The distribution of soil organic matter and nutrient mass coefficient Followed by the available potassium <available phosphorus <organic matter <Alkaline nitrogen,indicating that the content of alkali-hydrolyzed nitrogen was most affected by human activities.(3)The results of comprehensive evaluation of the soil fertility of the three major areas of the locusts of the locusts of Taihuai tree show that the soil fertility level is the resettlement area> the ancestral area> the folk area.(4)The content of heavy metal Cu,Pb,Zn,Mn and Cr in the three areas of the study area showed a tendency to decrease gradually from near and far from the main road side.The contents of heavy metals Mn,Zn and Pb in the soil of the resettlement area were significantly different from the main road side,5 meters from the tourway and10 meters from the roadway(P <0.05).The contents of Cu,Zn and Pb in the soil of the ancestral area were significantly different from the main road side,5 meters from the runway and 10 meters from the road(P <0.05).The contents of heavy metals Mn,Cu,Cr,Zn and Pb in the soil of the folk area were significantly different from the main road side,5 meters from the road and 10 meters from the road(P <0.05).The three elements of Cu,Pb and Zn are higher in the whole area than that of the other two kinds of heavy metal elements,which indicates that the interference of the three elements is significant,andthe spatial distribution is different.(5)Taking the soil background value of Shanxi Province as the evaluation basis,the single factor index evaluation results showed that the single factor index of the heavy metal in the scenic area was not more than 1 except the Zn element,which indicated that the total soil of the scenic area had not been polluted,but this problem should be the attention of the scenic area managers,if necessary,the use of appropriate measures.The results of the single factor pollution index test showed that the whole soil of the scenic area was not polluted by the reference value of CJ / T340-2011 green soil.(6)Based on the background value of soil in Shanxi Province,the comprehensive pollution index analysis of the study area showed that the comprehensive pollution index(p=0.98)and the comprehensive pollution index of the ancestral area were analyzed by the Nemerot pollution index method(P=0.88).The overall soil pollution index was greater than 0.7,reaching the alert level.The comprehensive pollution index(p=0.67)in the folk area shows that the soil is currently in a safe state,but it is almost the same as the warning value.The results show that the study area is in a safe state.In order to make the scenic area further develop,the Nemerite pollution index method is needed to evaluate the soil reference value of CJ / T340-2011 green soil.Real-time monitoring of changes in the soil environment and do a corresponding response to the initiative. |
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