CAJ | 학술논문

通过测定岷江上游16年生本地种油松和外来种辐射松人工林下不同土壤层次中各形态磷素含量以及磷酸酶活力,阐述两种林分对土壤磷素含量及其分布的影响.结果表明,在各个土层中,两种林分下的土壤含水量、pH值、有机碳的含量以及微生物生物量磷均无显著差异.在0～20cm土层中,油松林与辐射松林土壤全磷、Al-P、Fe-P、Ca-P含量以及磷酸酶活力均无显著差异,而油松林土壤有效磷和有机磷显著高于辐射松林;在20～40cm土壤中,油松林土壤全磷、有效磷、有机磷、Al-P、Fe-P含量与辐射松林差异不显著,油松林土壤Ca-P含量、酸性磷酸酶和中性磷酸酶活力显著高于辐射松林;在40～60cm土壤中,油松林土壤除中性磷酸酶活力与辐射松林的差异不显著外,其余各形态磷素含量和酸性磷酸酶活力变化与20～40cm土壤中的一致.此外,随土壤深度的增加,两种人工林土壤各形态磷素含量、磷酸酶活力都呈降低的趋势.单从土壤磷的状况看,油松林土壤中磷素含量高于辐射松林.
통과측정민강상유16년생본지충유송화외래충복사송인공림하불동토양층차중각형태린소함량이급린산매활력,천술량충림분대토양린소함량급기분포적영향.결과표명,재각개토층중,량충림분하적토양함수량、pH치、유궤탄적함량이급미생물생물량린균무현저차이.재0～20cm토층중,유송림여복사송림토양전린、Al-P、Fe-P、Ca-P함량이급린산매활력균무현저차이,이유송림토양유효린화유궤린현저고우복사송림;재20～40cm토양중,유송림토양전린、유효린、유궤린、Al-P、Fe-P함량여복사송림차이불현저,유송림토양Ca-P함량、산성린산매화중성린산매활력현저고우복사송림;재40～60cm토양중,유송림토양제중성린산매활력여복사송림적차이불현저외,기여각형태린소함량화산성린산매활력변화여20～40cm토양중적일치.차외,수토양심도적증가,량충인공림토양각형태린소함량、린산매활력도정강저적추세.단종토양린적상황간,유송림토양중린소함량고우복사송림.
This paper examined the contents of different phosphorus (P) pools and phosphatase activity in different soil layers under exotic Pinus radiata (PR) plantation and adjacent native Pinus tabulaeformis (PT) plantation. Results showed that there were no significant differences in soil total organic carbon (TOC), soil moisture content (SMC), pH and soil microbial biomass phosphorus (SMBP) in each soil layer between the two plantations. In the 0-20 cm depth soil, the contents of available phosphorus (AP) and total organic phosphorus (TPo) were significant higher in the PT plantation than the PR plantation, while in the 20-40 cm depth soil, the contents of Ca-P, acid and neutral phosphatase activities were significant higher in the PR plantation than the PT plantation. In the 40-60 cm depth soil, the PT plantation had significantly higher Ca-P and acid phosphatase activity than the PR plantation. In addition, with the increasing soil depth, the contents of different P pools and phosphatase activity decreased in both plantations. These results confirmed that the P content in the PT plantation was higher than in the PR plantation. Therefore, in terms of the supply of soil P, the PT could be superior to the PR as the tree species selection for the afforestation program in this region.