攀西地区5个油橄榄品种细根形态特征及碳氮磷化学计量特征研究  

Morphological characteristics of fine roots and stoichiometric characteristics of carbon,nitrogen and phosphorus of five Olea europaea varieties in Panxi region

作　　者：郝浩涵 文登学 邓龙 张茜 赖长鸿 李贤伟[2] HAO Haohan;WEN Dengxue;DENG Long;ZHANG Qian;LAI Changhong;LI Xianwei(Sichuan Forestry and Grassland Inventory and Planning Institute,Chengdu 611830,China;College of Forestry,Sichuan Agricultural University,Chengdu 611130,China;Sichuan Forestry Investigation and Design Research Institute Co.,LTD.,Chengdu 611830,China;Liangshan Zhongze New Technology Development Co.,Ltd.,Liangshan 615000,China)

机构地区：[1]四川省林业和草原调查规划院,四川成都611830 [2]四川农业大学林学院,四川成都611830 [3]四川省林业勘察设计研究院有限公司,四川成都611830 [4]凉山州中泽新技术开发有限责任公司,四川凉山615000

出　　处：《四川林业科技》2024年第2期33-40,共8页Journal of Sichuan Forestry Science and Technology

摘　　要：探究油橄榄(Olea europaea)细根形态特征和养分分配格局对油橄榄引种栽培生产具有重要意义。通过对攀西地区5个油橄榄品种的细根直径、比表面积、比根长、组织密度等形态参数和碳(C)、氮(N)、磷(P)化学计量特征研究,探讨细根形态和养分含量在不同油橄榄品种细根根序等级间的差异和与土壤理化性质间的关联。研究结果表明:(1)随着根序等级的增加,细根直径、组织密度呈明显的递增趋势,比表面积、比根长则呈现出明显递减趋势;(2)细根C含量、C:N、C:P随根序的增加而逐渐增大,细根N、P含量基本呈现随着根序的增加而降低,除白橄榄外,细根N:P总体呈现随着根序序级增加而增加的趋势;(3)细根C含量与土壤理化特征指标间均无显著相关性;细根N含量与土壤C、P含量间存在显著正相关(p<0.05),与土壤C:N间存在着极显著的正相关(p<0.01);细根P含量与土壤C、P含量及C:N间存在极显著正相关(p<0.01),与土壤N:P间存在显著负相关(p<0.05);细根C:N与土壤C:N呈显著负相关(p<0.05),细根N:P、C:P与土壤理化特征指标间无显著的相关性。It is of great significance to explore the fine root morphological characteristics and nutrient distribution patterns of Olea europaea for its introduction,cultivation,and production.By studying the morphological parameters such as fine root diameter,specific surface area,specific root length,and tissue density of five Olea europaea varieties in the Panxi region,as well as the chemical stoichiometric characteristics of carbon(C),nitrogen(N),and phosphorus(P),the differences in fine root morphology and nutrient content among different olive varieties in fine root order levels and their correlation with soil physicochemical properties were discussed.The research results showed that:(1)With the increase of root order level,the diameter of fine roots and tissue density showed a significant increasing trend,while the specific surface area and specific root length showed a significant decreasing trend;(2)The content of fine root C,C:N,and C:P gradually increased with the increase of root order,while the content of fine root N and P basically decreased with the increase of root order.Except for white olives,the overall trend of fine root N:P increased with the increase of root order level;(3)There was no significant correlation between fine root C content and soil physicochemical characteristics indicators.There was a significant positive correlation(p<0.05)between the fine root N content and soil C and P content,and a highly significant positive correlation(p<0.01)with soil C:N.There was a highly significant positive correlation(p<0.01)between the fine root P content and soil C,P content,and C:N,while there was a significant negative correlation(p<0.05)between the fine root P content and soil N:P.There was a significant negative correlation between fine root C:N and soil C:N(p<0.05),while there was no significant correlation between fine root N:P,C:P and soil physicochemical characteristics.

关 键 词：油橄榄 细根形态 化学计量特征 攀西地区 

分 类 号：S565.7[农业科学—作物学]