Differences of Soil Physical and Chemical Properties among Different Compound Management Stands of Cunninghamia lanceolata
In order to investigate change characteristics of soil physical and chemical properties in different Cunninghamia lanceolata stands interplanted with Asparagus cochinchinensis,and find out the best manage-ment model,indexes of soil physical and chemical properties in 0-20 and 20-40 cm soil layers in different C.lanceolata stands interplanted with A.cochinchinensis were determined.Soil physical and chemical proper-ties of stands were comprehensively evaluated by membership function.Results showed that in 0-20 cm soil layer,there were significant differences in soil capillary porosity,non-capillary porosity and total porosity among different compound management stands of C.lanceolata,and there was no difference in soil aeration.In 20-40 cm soil layer,there were significant differences in soil capillary porosity,non-capillary porosity,total po-rosity and aeration among different compound management stands of C.lanceolata.With increase of soil depth,soil capillary porosities,non-capillary porosities,total porosities and aeration in different compound manage-ment stands of C.lanceolata mostly decreased.In 0-20 and 20-40 cm soil layers,there were significant differ-ences in contents of soil total carbon,total nitrogen,total phosphorus and total potassium among different com-pound management stands of C.lanceolata.Contents of soil total phosphorus(0.39 and 0.34 g/kg)and total po-tassium(11.98 and 14.1 g/kg)in C.lanceolata+Pinus massoniana+A.cochinchinensis stand were the highest.With increase of soil depth,contents of soil total carbon,total nitrogen and total phosphorus in four stands of C.lanceolata mostly decreased.C.lanceolata+P.massoniana+A.cochinchinensis stand had the highest comprehen-sive value of membership function and was the best compound management stand,which had good aeration and high fertility in soil.Because A.cochinchinensis had higher demand for nitrogen,attention should be paid to sup-plement of nitrogen fertilizer in management.
compound managementsoil physical and chemical propertiesCunninghamia lanceolataAspara-gus cochinchinensis
万方数据
维普
