中国马铃薯2025，Vol.39Issue(4)：271-282,12.DOI:10.19918/j.cnki.1672-3635.2025.04.005
喷施表油菜素内酯对减施基肥马铃薯生理和产量的影响
Effects of Spraying Brassinolide on the Physiology and Yield of Potato with Reduced Basal Fertilizer Application
摘要
Abstract
Reducing the application of chemical fertilizers in farmland is a crucial aspect of sustainable modern agriculture.This study was to investigate the effects of spraying different concentrations of 2,4-epibrassinolide(EBR)on the physiology and yield of potatoes under reduced basal fertilizer conditions,aiming to provide technical references for hormone regulation to enhance potato yield.Using the potato variety'Dongnong 310'as the experimental material,a field trial was conducted using a randomized block design with four treatments:conventional basal fertilizer(T1),50%reduced basal fertilizer(T2),50%reduced basal fertilizer+spraying 0.02 mg/L EBR(T3),and 50%reduced basal fertilizer+spraying 0.1 mg/L EBR(T4).EBR was sprayed once at the early tuber formation stage(July 1st)and supplemented once more on July 8th.Measurements of plant height,stem diameter,relative chlorophyll content,photosynthetic parameters,chlorophyll fluorescence kinetics parameters,and canopy coverage were taken during the early tuber formation,late tuber formation,tuber bulking,and starch accumulation stages.Yield was determined at maturity,and starch content was measured in harvested tubers.Under reduced basal fertilizer conditions,spraying EBR promoted potato growth and increased yield.In the late tuber formation stage,compared to T2,the T3 treatment improved potato plant height,stem diameter,Pn,Fv/Fm,IK,and starch content.The T4 treatment increased SPAD values,Tr,Gs,canopy coverage,and qP.Spraying different concentrations of EBR significantly affected tuber yield under reduced fertilizer conditions,with T3 and T4 treatments increasing yield by 29.32%and 20.53%,respectively,compared to T2.The number of tubers per plant was highest in T3,followed by T1.T1 and T3 treatments increased the number of tubers per plant by 33.62%and 37.75%,respectively,compared to T2.The marketable tuber percentage was 14.53%and 16.07%higher in T1 and T4,respectively,than in T2.Principal component analysis showed that the comprehensive scores for potatoes under T1 to T4 treatments were 3.911,1.175,2.462,and 2.458,respectively,with the ranking order being T1>T3>T4>T2.In conclusion,under 50%reduced basal fertilizer conditions,spraying EBR once at the early tuber formation stage(July 1st)and supplementing once on July 8th could enhance tuber starch content and yield.Spraying 0.02 mg/L EBR demonstrates a better effect on promoting potato growth and improving yield.关键词
马铃薯/基肥减量/表油菜素内酯/光合作用/产量Key words
potato/basal fertilizer reduction/2,4-epibrassinolide/photosynthesis/yield分类
农业科技引用本文复制引用
燕雪嘉,艾昭光,张瑀瑶,赵浩宇,王文辕,唐鑫华,石瑛..喷施表油菜素内酯对减施基肥马铃薯生理和产量的影响[J].中国马铃薯,2025,39(4):271-282,12.基金项目
现代农业产业技术体系建设专项(CARS-09). （CARS-09）
