广东农业科学2025，Vol.52Issue(1)：49-59,11.DOI:10.16768/j.issn.1004-874X.2025.01.005
生物刺激素对冬瓜幼苗生长的影响
Effects of Biostimulants on the Growth of Wax Gourd Seedlings
摘要
Abstract
[Objective]The study aims to identify biostimulants conducive to the cultivation of robust wax gourd seedlings and to determine the optimal concentration for their application.[Method]The black wax gourd'Tiezhu 2'was used as experimental material,the effects of eight biostimulants(seaweed extract,seaweed fertilizer,polypeptide,alginate oligosaccharide,fulvic acid,canthaxanthin,astaxanthin and lactosyl peptide)on the quality of wax gourd seedlings were studied.By measuring the seedling strength index and root vitality of plants under different types and concentrations of biostimulants,the most suitable concentration of biostimulant was selected for subsequent experiments.The physiological indicators including root morphology,leaf area,and chlorophyll content of wax gourd seedlings under different biostimulant treatments were analyzed by principal component analysis,and the capacity of the 8 biostimulants in promoting the growth of wax gourd seedlings was ranked.[Result]Biostimulants with suitable concentrations could significantly improve the growth quality of wax gourd seedlings,as manifested by an increase in plant height,stem thickness,root system growth and photosynthetic capacity.Among them,the optimal treatment of 0.2 g/L alginate oligosaccharide significantly increased the stem thickness,plant height,root volume,chlorophyll a,chlorophyll b and leaf area of wax gourd seedlings by 15.03%,43.42%,359.41%,121.62%,61.11%,and 58.30%respectively compared with those of the control.In addition,the 0.5 g/L fulvic acid and 0.5 g/L lactosyl peptide treatments performed suboptimally,increasing root vitality by 185.16%and 14.34%,respectively,leaf area by 50.04%and 27.79%,respectively,and total chlorophyll a+b content by 54.05%and 51.35%,respectively.The results of the principal component analysis showed that the growth-promoting effects of different treatments on wax gourd seedlings ranked as:alginate oligosaccharide 0.2 g/L(score 0.97)>fulvic acid 0.5 g/L(0.64)>lactosyl peptide 0.5 g/L(0.62),which were significantly better than the control(0.10).[Conclusion]The biostimulants with optimal concentrations could significantly improve the seedling strength index and root vitality of wax gourd seedlings,the effect of alginate oligosaccharide was the best at 0.2 g/L,and fulvic acid and lactosyl peptide also showed good growth-promoting effect at a concentration of 0.5 g/L.关键词
生物刺激素/褐藻寡糖/黄腐酸/乳糖肽/冬瓜/育苗/壮苗指数Key words
biostimulant/alginate oligosaccharide/fulvic acid/lactosyl peptide/wax gourd/seedling cultivation/seedling strength index分类
农业科技引用本文复制引用
吴金怡,常静静,朱雪梅,李静,陈潇,宋钊,陈雷,涂攀峰,张白鸽..生物刺激素对冬瓜幼苗生长的影响[J].广东农业科学,2025,52(1):49-59,11.基金项目
广东省乡村振兴战略专项种业振兴行动项目(2023-NJS-00-010) （2023-NJS-00-010）
国家大宗蔬菜产业技术体系广州综合试验站项目(CARS-23-G50) （CARS-23-G50）
