热带作物学报2024，Vol.45Issue(4)：783-792,10.DOI:10.3969/j.issn.1000-2561.2024.04.014
椰林间作中纳米铁对鹧鸪茶叶片生长、光合及化学特征的综合影响
Combined Effects of Nano-iron on Leaf Growth,Photosynthetic and Chemical Characteristics of Mallotus peltatus under Coconut Forest
摘要
Abstract
The intercropping of Mallotus peltatus under the forest helps to break the bottleneck of land use.It is of great significance to apply green nanotechnology to improve the benefits of its compound planting.In order to clarify the regulatory role of nano-iron in the intercropping of M.peltatus under the coconut forest,the annual seedling of M.pel-tatus was taken as the research object to carry out the cultivation experiment.We investigated the comprehensive effects of five concentrations of nano-iron treatments(CK:0 mg/L,T1:25 mg/L,T2:50 mg/L,T3:75 mg/L,T4:100 mg/L)on the leaf growth,photosynthetic and chemical characteristics of M.peltatus.After the first nano-iron treatment,the leaf length,width and dry weight of M.peltatus in T3 treatment were significantly higher than those in CK,while the leaf number in each treatment was significantly more than that in CK.Compared with CK,the chlorophyll content of M.peltatus treated with four nano-iron concentrations increased significantly by 14.96%(T1),16.18%(T2),17.91%(T3)and 20.58%(T4).As the concentration of nano-iron increased,the leaf net photosynthetic rate,transpiration rate,stomatal conductance,efficiency of primary conversion of light energy of PSⅡ,actual photochemical efficiency of PSⅡ and electron transport rate of M.peltatus overall increased.After the second nano-iron treatment,leaf length,width,dry weight and number of M.peltatus treated with T1,T3 and T4 were significantly higher than those of CK.Compared with CK,the chlorophyll content of M.peltatus in each treatment significantly increased by 10.28%(T1),7.53%(T2),11.13%(T3)and 11.41%(T4).With the increase of nano-iron concentration,the leaf net photosynthetic rate,transpira-tion rate and stomatal conductance of M.peltatus increased significantly,but decreased when the concentration reached T3 treatment.The potential activity of PSⅡ and efficiency of primary conversion of light energy of PSⅡ of M.pel-tatus also decreased significantly in T3 treatment.After two treatments,the contents of flavone,fat and ash of M.peltatus increased significantly in T1 treatment compared with CK.The contents of fat and ash decreased with the increase of nano-iron concentration.To sum up,nano-iron has a positive regulatory effect on the growth of M.peltatus under the coconut forest,but high concentration will inhibit its photosynthesis and growth.We recommend that the appropriate concentration is 25‒50 mg/L.This study could provide theoretical reference for the application of nano-iron in intercropping M.peltatus under the coconut forest.关键词
纳米铁/椰林间作/鹧鸪茶/光合作用/生长Key words
nano-iron/coconut intercropping/Mallotus peltatus/photosynthesis/growth分类
农业科技引用本文复制引用
余若云,杨伟波,冯元姣,罗子飞,陈思婷..椰林间作中纳米铁对鹧鸪茶叶片生长、光合及化学特征的综合影响[J].热带作物学报,2024,45(4):783-792,10.基金项目
海南省科技计划项目(No.ZDYF2022XDNY206) （No.ZDYF2022XDNY206）
现代农业产业技术体系专项资金项目(No.CARS-14-2-31). （No.CARS-14-2-31）
