不同套种模式下草珊瑚生物量与土壤理化性质的相关性

以福建省将乐国有林场套种草珊瑚杉木林和不套种草珊瑚杉木林作为研究对象,对不同坡位套种与不套种草珊瑚林地土壤的理化性质及草珊瑚生物量进行分析。结果表明:1杉木林下套种草珊瑚对林地土壤理化性质具有改良作用,套种草珊瑚后土壤含水率和土壤孔隙度分别提高了76.32%和62.41%,土壤密度降低了11.12%;土壤有机质、全氮、全磷、碱解氮、有效磷和速效钾质量分数分别增加了27.19%、14.78%、8.91%、23.11%、29.45%、11.33%,全钾质量分数降低了2.69%。2下坡位土壤含水率、密度和孔隙度分别比上坡位增加了17.41%、1.87%、4.29%;下坡位有机质、全磷、碱解氮和速效钾质量分数分别比上坡位增加了4.74%、4.43%、9.07%、6.80%,全氮、全钾和有效磷质量分数分别比上坡位降低了8.07%、0.17%、31.28%。3下坡位草珊瑚的地上生物量、地下生物量和总生物量均大于上坡位,分别增加了27.48%、53.16%、35.39%。4土壤密度、碱解氮和速效钾质量分数与草珊瑚生物量呈显著正相关(P0.05),全氮和有效磷质量分数与草珊瑚生物量呈显著负相关(P0.05)。

Correlait on between Sarcandra Glabra Biomass and Soil Physical-che mical Properties under Different Interplan-ting Pattern

We studied the correlation between Sarcandra Glabra biomass and soil physical chemical properties under different in-terplanting pattern in Cunninghamia lanceolata of different slope positions.The results showed that: ①Interplanting can improve the soil physical and chemical properties.Soil water content and soil porosity increased, while soil bulk density de-creased;Soil organic matter, total N, total P, available N , available P and available K contents increased by 27.19%, 14.78%, 8.91%, 23.11%, 29.45%, and 11.33%, respectively, but total K decreased by 2.69%.②Compared with the bottom of the slope,the soil water content , bulk density, porosity, organic matter, total P, available N and available K in the top of the slope increased by17 .41%, 1.87%, 4.29%, 4.74%, 4.43%, 9.07%and 6.80%, respectively, while total N, total K and available P decreased by 8.07%, 0.17%and 31.28%, respectively.③Compared with the bottom of the slope, the aboveground biomass, underground biomass and total biomass of Sarcandra Glabra in the top of the slope in-creased by 27.48%, 27.48%and 27.48%, respectively.④There was significantly positive correlation between the soil bulk density, available N, available K and the biomass of Sarcandra Glabra, and significantly negative correlation between total N, available P and the biomass of Sarcandra Glabra.