CAJ | 학술논문

选择贵州喀斯特山区广泛分布的灌木林和灌草丛生态系统,探讨了三种优势灌木养分分布格局及其与土壤的关系.结果表明:(1)三种优势灌木叶片和果实的氮和钾元素含量高于茎干和根系,果实和茎干的磷含量比其他器官高,而钙镁主要集中在茎干和叶片.(2)在灌草丛中,三种灌木根系和茎干的N:P之间差异显著且变异很大,而在灌木林中,三种灌木根系的N:P比值变异较大,但它们之间没有差异.(3)根际有效态养分含量与叶片养分含量呈正相关关系,叶片磷与根际有效态磷显著正相关
선택귀주객사특산구엄범분포적관목림화관초총생태계통,탐토료삼충우세관목양분분포격국급기여토양적관계.결과표명:(1)삼충우세관목협편화과실적담화갑원소함량고우경간화근계,과실화경간적린함량비기타기관고,이개미주요집중재경간화협편.(2)재관초총중,삼충관목근계화경간적N:P지간차이현저차변이흔대,이재관목림중,삼충관목근계적N:P비치변이교대,단타문지간몰유차이.(3)근제유효태양분함량여협편양분함량정정상관관계,협편린여근제유효태린현저정상관
The nutrient distribution patterns of three dominant shrubs and the relationships between plants and soils have been ex-mined in the shrubland and the shrub-and-grassland, which have been extensively distributed in mountainous area in Guihzou, China. The results showed that: (1) The N and K concentrations in leaves and fruits were significantly higher than that in stems and roots of three dominant shrubs. The P concentrations in fruits were markedly higher than that in the other organs. The Ca and Mg concentra-tions in leaves and stems were higher than that in the other organs. (2) In the shrub-and-grassland, there were significant differences in N:P ratios in stems and roots between three dominant shrubs, and the N:P ratios varied extensively among the three shrubs. In the shrubland, the N:P ratios varied extensively among the three shrubs. (3) The P concentrations were significantly related to available P contents in rhizospheric soils.The results indicated that the P would limit plants' growth and finally influence the biogeochemistry characteristics of the Karst ecosystems.