摘要
以江门市同质园11个月生的8个菠萝品种(金钻菠萝、红皮菠萝、红香菠萝、手撕菠萝、金菠萝、巴厘菠萝、西瓜菠萝、芒果菠萝)为研究对象,探讨植株的生长、叶片气孔、解剖和元素(C、N、P、K)生态化学计量特征,拟揭示不同菠萝品种功能性状的差异,叶片元素含量和生态化学计量与植株生长的关系,以及生长的营养限制。研究结果表明:在菠萝成熟叶片的上、中、下不同部位中,多数品种中部的气孔密度最大;叶片厚度从上部到下部基本呈增大的趋势。且不同叶片部位或同一叶片部位菠萝品种间的气孔密度、保卫细胞长度、叶片总厚度和各组织解剖结构比例大小存在显著差异。不同菠萝品种间叶片C、N、P、K含量差异显著。菠萝对K的需求较高,因为其叶片K含量远远高于其N和P含量。菠萝叶片N和P含量远低于中国草地植物叶片N和P含量,但其C含量、C∶N和C∶P值高于全国草地植物和农田生态系统中植被的叶片平均水平。这表明菠萝吸收单位营养物质所能同化C的能力较高;可能是通过特殊的叶片形态或组织结构减少对营养元素的依赖,从而采取“减少需求策略”。8个菠萝品种间叶片C含量、C∶P和N∶P与植株的叶片总生物量呈显著负相关,符合生长速率假说。叶片N和P元素化学计量(N∶P)的初步研究结果表明,金菠萝和芒果菠萝受P限制,金钻菠萝、红皮菠萝、手撕菠萝和西瓜菠萝受N限制,而红香菠萝和巴厘菠萝受N和P的共同限制。该研究结果可为菠萝优质品种的选择和农业管理提供理论参考。
Leaf anatomy,plant growth traits and leaf ecological stoichiometry were analyzed in 8 pineapple cultivars(Gold diamond,Red skin,Red fragrant,Hand torn,Gold,Bali,Watermelon,and Mango)in a common garden in Jiang-men,Guangdong,China.The purpose was to explore the differentiation of functional traits between different pineapple cultivars,and the relationships between leaf ecological stoichiometry and plant growth as well as the plant nutrient limitation.The results showed that leaf stomatal density was the highest in the middle of leaves in most pineapple cul-tivars,and leaf thickness increased from the upper position to the lower position.There were significant differences in stomatal density,guard cell length,leaf thickness and anatomical proportion in different leaf positions within the same cultivar or in the same leaf position between different pineapple cultivars.Different pineapple cultivars differed in the leaf C,N,P and K content.Pineapple plants required large amount of K,as leaf K content was much higher than N and P content.Leaf N and P content in pineapples were lower than those in grassland plants in China.The leaf content of N and P of pineapple was higher than that of the plants in grasslands and in farmland ecosystems in China,while the leaf content of C,C∶N and C∶P were higher than those of the plants in grasslands and in farmland ecosystems in China,indicating that pineapple plant is reducing the dependence on nutrients through special leaf morphological or histologi-cal structure,agreement with the“Demand reduction strategy”.Moreover,leaf C content,C∶P and N∶P were signifi-cantly negatively correlated with total leaf biomass,which was consistent with the growth rate hypothesis.Ranging from 6.40 to 19.07 across all pineapple cultivars,leaf N∶P values indicated that plant growth of Golden and Mango pineapples were limited by P;Golden diamond,Red skin,Hand torn and Watermelon pineapples were restricted by N,while Red fragrant and Bali pineapples were co-limited by N and P.This study two
作者
潘艳菊
冯莹
欧阳有勤
陈晓慧
叶倚歆
蔡志全
PAN Yanju;FENG Ying;OUYANG Youqin;CHEN Xiaohui;YE Yixin;CAI Zhiquan(Department of Horticulture,Foshan University,Foshan,Guangdong 528000,China;Forest Resources Conservation Center,Guangdong Forestory Bureau,Guangzhou,Guangdong 510173,China;Jiangmen Clean and Green Agricultural Technology De-velopment Co.,Ltd.,Jiangmen,Guangdong 529159,China)
出处
《热带作物学报》
CSCD
北大核心
2023年第7期1407-1417,共11页
Chinese Journal of Tropical Crops
基金
广东省林业创新项目(No.2021KJCX002)
国家自然科学基金项目(No.31971697)
广东省科技创新战略专项(乡村振兴专项2021-6844)。
关键词
菠萝
品种
气孔
解剖
矿质元素
生态化学计量
pineapple
cultivars
stomata
anatomy
mineral elements
ecological stoichiometry
