【摘要】 为了研究西双版纳植胶区不同品系橡胶树生长对土壤磷的影响、了解土壤磷变化与橡胶生长的关系,分别在西双版纳不同植胶区(景洪、勐腊、勐海)采集了不同品系、不同割龄橡胶林土壤和橡胶树叶片,分析了土壤全磷、速效磷和橡胶树叶片磷空间变化特征,探讨了土壤磷与橡胶树叶片磷的关系。结果表明,西双版纳不同植胶区、不同品系橡胶林土壤中磷的变化差异较大,橡胶林土壤中全磷以景洪植胶区最高,勐腊、勐海植胶区相对较低,并随橡胶种植品系而变化。RRIM600、GT1品系橡胶林土壤中全磷含量较高、云研-774相对较低,10～20割龄较高、0～10割龄和20～30割龄较低。土壤速效磷含量较低、变异最大;橡胶树叶全磷含量表现为勐腊、景洪>勐海,RRIM600和云研-774最高、GT1较低,低割龄和老割龄磷相对较高。土壤速效磷与橡胶树叶片磷成极显著的正相关,土壤速效氮磷比与对橡胶树叶氮磷比成显著的正相关。橡胶树及土壤磷含量随橡胶树品系、割龄、生长环境而变化;不同割龄、不同品系橡胶树生长对土壤磷含量具有显著的影响。更多还原

【Abstract】 In order to understand the influence of the growth of different rubber tree（Hevea brasiliensis）varieties on soil phosphorus in rubber plantations occurring in different ecological regions in Xishuangbanna,and to reveal the relationship between soil phosphorus change and the rubber growth,samples of the soils and the rubber tree leaves of different varieties and ages were collected from different growing areas in Xishuangbanna（i.e.,Jinghong,Mengla and Menghai）.Total and available phosphorus in the soils and the leaves were measured to examine the spatial variation characteristics and the relationship between the soil and leaf phosphorus.Significant differences in soil phosphorus were found between different growing regions and rubber tree varieties.Soil total phosphorus in Jinghong was higher than in Mengla and Menghai,and varied among different varieties.Soil total phosphorus of RRIM600 and GT1 rubber forest was high,while yunan-774 was relatively low.For different tapping ages,soils of the 10-20^th rubber tapping year trees demonstrated higher soil total phosphorus,but lower in the soils of the 0-10^th and 20-30^th rubber tapping year trees.Compared with soil total phosphorus,soil available phosphorus was low,and exhibited significant variations.The content of total phosphorus in rubber tree leaves was in the order of Mengla,Jinghong>Menghai,RRIM600 and yunyan-774 were high,GT1 was low,and the phosphorus was relatively high at young and old rubber tapping age trees.There was a significant positive correlation between soil available phosphorus and rubber trees leaf phosphorus,and the ratio of soil available nitrogen to phosphorus also showed significantly positive correlation with the ratio of nitrogen to phosphorus in rubber tree leaves.Phosphorus content of rubber tree leaves and soil varied with varieties,rubber tapping ages and growth environments.Soil phosphorus content was significantly affected by rubber tree varieties with different rubber tapping ages.更多还原