Effects of paclobutrazol application on plant architecture,lodging resistance,photosynthetic characteristics,and peanut yield at different single-seed precise sowing densities  

作　　者：Jihao Zhao Huajiang Lai Chen Bi Mengjie Zhao Yanling Liu Xiangdong Li Dongqing Yang 

机构地区：[1]State Key Laboratory of Crop Biology,Agronomy College of Shandong Agricultural University,Tai’an 271018,Shandong,China

出　　处：《The Crop Journal》2023年第1期301-310,共10页作物学报（英文版）

基　　金：supported by the National Key Research and Development Program of China(2020YFD1000902);the Shandong Key Research and Development Program(2018YFJH0601-3);the Major Agricultural Applied Technological Innovation Projects in Shandong Province(SD2019ZZ11);the Shandong Modern Agricultural Technology and Industry System(SDAIT-04-01)。

摘　　要：The key to high-yielding peanut cultivation is the optimization of agricultural production practices.Regulating single-seed precise sowing(SSPS)density and paclobutrazol(Pbz)application concentration are effective practices that increase peanut yield by improving plant architecture,lodging resistance,and photosynthetic characteristics.Therefore,we conducted a two-factor field optimization experiment for the sowing density(D1:1.95×10^(5)plants ha^(-1),D52:2.40×10plants ha^(-1),D3:2.85×10^(5)plants ha^(-1),and D4:3.30×10^(5)plants ha^(-1))and Pbzapplication concentration(P0:0 mg L^(-1)and P1:100 mg L^(-1)).The objective was to optimize agricultural production practices and provide a theoretical basis for highyielding peanut cultivation by evaluating the effects of sowing density and Pbzapplication on plant architecture,lodging resistance,photosynthetic characteristics,and yield.The results showed that at the same Pbzapplication concentration,increasing sowing density increased lodging percentage and reduced leaf photosynthetic capacity.At the same sowing density,Pbzapplication reduced lodging percentage by decreasing plant height(PH),improving lignin biosynthesis-related enzyme activities,and enhancing stem puncture strength(SPS)and breaking strength(SBS).The paclobutrazol-induced alterations in plant architecture and lodging resistance improved light transmission at the middle and bottom leaf strata,resulting in the increase in relative chlorophyll content and net photosynthetic rate(Pn)of leaves.Furthermore,D3P1treatment had the highest peanut yield among all treatments.In summary,the production strategy combining the sowing density of 2.85×10^(5)plants ha^(-1)with the application of100 mg L^(-1)Pbzwas found to be the optimal agricultural production practice for giving full play to production potential and achieving higher peanut yield.

关 键 词：Sowing density Paclobutrazol application Lodging resistance Photosynthetic characteristics Peanut yield 

分 类 号：S565.2[农业科学—作物学]