| This paper mainly studies the interrelationship between Gleditsiaheterophylla Bunge bush and its surrounding soil and environmentalfactors in Shanxi province. By analyzing its distribution, floristiccomposition, community structure, species diversity, living organismstyles and biomass, etc. the paper aims to give a theoreticalfoundation for the protection and utilization of Gleditsia heterophyllaBunge bush in different site conditions in Shanxi Province, to bringinto full play the multiple functions and benefits of Gleditsiaheterophylla Bunge bush, and above all, to provide an importanttheoretical guidance and a role model for the improvement ofecological system. The analysis of the influence of Gleditsiaheterophylla Bunge bush on soil’s physicochemical property cancontribute to the understanding of the relationship between plantsand soil and provide a theoretical basis and reference value forsubsequent exploitation, ecological environment restoration, and soilremediation. The study shows as following:(1) Gleditsia heterophylla Bunge bush in Shanxi Province mainly locates in the low ravines in Lv Liang mountain, Tai Hang mountainand Tai Yue mountain. The highest aptitude of its location is 1490 m,the lowest is 450 m, and it frequently appears in the Sunny Slope andthe half Sunny Slope where the soil texture is seriously drought andbarren. It can also survive on the rock bare area. The soil for thesemountains is brown soil.(2) This community species is composed of 125 species of seedplants, belonging to 38 families, 93 genera. It mainly locates in theNorth temperate zone, which shows that Gleditsia heterophyllaBunge bush has character of the north temperate zone, and thiscomplies with the practical local environment and climate;(3) The community structure is relatively simple. It can be dividedinto 3 levels: shrub layer, herb layer, and ground layer. The main layeris shrub layer, the secondary layer is herb layer. The phanerophytestakes a superiority position of shrub layer, about 29.8%, and the lifeperformance is phanerophyte > hemicryptophyte > chamaephytes >therophyte > geophyte. All this Show that the community hascharacter of the warm temperate zone of deciduous broadleavedforest;(4) Diversity index analysis shows that it is relatively low but nosignificant difference of the diversity index of Gleditsia heterophyllaBunge bush in different areas. The survey shows a relativelyconsistent trend. Gleditsia heterophylla Bunge bush biomass indifferent research areas are lower than other species, and it statesthat growing environmental conditions and soil nutrient conditions ofthis species is not very good, but normal growth of this species in thiskind of the environment conditions shows that the species has characteristics of drought-enduring and soil barren resistance;(5) The relationship among Gleditsia heterophylla Bungebush—soil—environmentThe analysis of relativity between Gleditsia heterophylla Bungebush on Lv Liang Mountain and environment factors shows thatSpecies in that area is largely affected by the intensity of humaninterference. And the influence is also related in its terrain and soilfactor.The analysis of Gleditsia heterophylla Bunge bush‘s soilphysico-chemical propertieson in Lv Liang mountain shows that theroot of Gleditsia heterophylla Bunge bush is developed, and its waterconservation function is higher than the hillsides. But, in general, thesoil water content, organic matter, Total content of nutrient, AlkalineHydrolytic Nitrogen, available phosphorus, and rapidly-availablepotassium content are lower, which is related to the high temperatureenvironment of Gleditsia heterophylla Bunge bush, strong sunshine,less rainfall, and which also leads to a less community litter, lowhumus decomposition rate, suffocate nutrition circulation, and poorsoil nutrient in the community. |
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