Polymorphism Study on Ecological Factors in Plant Habitats:A Case Study of the South Taihang Hilly Region
Taking the hilly and mountainous region of the South Taihang as an example,this study focused on the situation where the root systems of different plant life forms were crowded in the same layer,investigated the poly-morphism of ecological factors in the plant habitat,and determined the suitable factor space for the"arbor+shrub"dominant plant combinations.Conclusions are presented as follows.(1)The dominant plant combinations in the hilly ecological subsystem include Broussonetia papyrifera+Vitex negundo,Cupressus funebris+Vitex negundo,Ulmus pumila+Vitex negundo,Ailanthus+Vitex negundo,Rhus Typhina+Vitex negundo,Melia azedarach+Vitex negun-do,and Broussonetia papyrifera+Ziziphus jujube.The 0～20 cm layer is a stable layer for the annual plant habitat,and the 20～100 cm layer is a stable layer for the perennial plant habitat dominated by arbors and shrubs.(2)Differ-ent dominant plant combinations in the hilly ecological subsystem have different suitable ranges,with variations in the organic matter content,salt content,and comprehensive index of soil nitrogen,phosphorus,and potassium.(3)The most suitable coexistence range for different dominant plant combinations in the hilly ecological subsystem is a mois-ture content of 25.80％～30.45％,an organic matter content of 0.71％～2.95％,a salt content of 0.75～1.33 mg·g,and a comprehensive index of soil nitrogen,phosphorus,and potassium of 1.03～1.52.
plant habitatecological factorspolymorphismSouth Taihang hilly region
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