不同套種模式下草珊瑚生物量與土壤理化性質的相關性1)

徐雪蕾 盧妮妮 王新杰 王廷蓉 張鵬

(北京林業大學，北京，100083) (北京智農天地網絡技術有限公司) (北京林業大學實驗林場)

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不同套種模式下草珊瑚生物量與土壤理化性質的相關性1)

徐雪蕾 盧妮妮 王新杰 王廷蓉 張鵬

(北京林業大學，北京，100083) (北京智農天地網絡技術有限公司) (北京林業大學實驗林場)

以福建省將樂國有林場套種草珊瑚杉木林和不套種草珊瑚杉木林作為研究對象，對不同坡位套種與不套種草珊瑚林地土壤的理化性質及草珊瑚生物量進行分析。結果表明：①杉木林下套種草珊瑚對林地土壤理化性質具有改良作用，套種草珊瑚后土壤含水率和土壤孔隙度分別提高了76.32%和62.41%，土壤密度降低了11.12%；土壤有機質、全氮、全磷、堿解氮、有效磷和速效鉀質量分數分別增加了27.19%、14.78%、8.91%、23.11%、29.45%、11.33%，全鉀質量分數降低了2.69%。②下坡位土壤含水率、密度和孔隙度分別比上坡位增加了17.41%、1.87%、4.29%；下坡位有機質、全磷、堿解氮和速效鉀質量分數分別比上坡位增加了4.74%、4.43%、9.07%、6.80%，全氮、全鉀和有效磷質量分數分別比上坡位降低了8.07%、0.17%、31.28%。③下坡位草珊瑚的地上生物量、地下生物量和總生物量均大于上坡位，分別增加了27.48%、53.16%、35.39%。④土壤密度、堿解氮和速效鉀質量分數與草珊瑚生物量呈顯著正相關(P<0.05)，全氮和有效磷質量分數與草珊瑚生物量呈顯著負相關(P<0.05)。

杉木；草珊瑚；套種；土壤理化性質；生物量；相關性

We studied the correlation betweenSarcandraGlabrabiomass and soil physical chemical properties under different interplanting pattern inCunninghamialanceolataof 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 decreased; 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 by 17.41%, 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 ofSarcandraGlabrain the top of the slope increased 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 ofSarcandraGlabra, and significantly negative correlation between total N, available P and the biomass ofSarcandraGlabra.

杉木(Cunninghamialanceolata(Lamb) Hook)是我國南方重要的速生用材樹種，生長速度快，材質優良，用途廣泛，經濟效益高，在我國南方廣泛種植。但是，大面積杉木純林的營造容易導致林地生境惡化、土壤肥力下降等問題[1-4]，進而影響杉木人工林生態系統的長期穩定性和持久生產力[5-6]。……