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Influence of Biological and Chemical Inputs on Soybean Seed Yield and Composition
Influence of Biological and Chemical Inputs on Soybean Seed Yield and Composition
Influence of Biological and Chemical Inputs on Soybean Seed Yield and Composition

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202103700
ISBN  
9798314896631
DDC  
630
저자명  
Colet, Fabiano.
서명/저자  
Influence of Biological and Chemical Inputs on Soybean Seed Yield and Composition
발행사항  
[Sl] : The Ohio State University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
130 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
주기사항  
Advisor: Lindsey, Laura E.
학위논문주기  
Thesis (Ph.D.)--The Ohio State University, 2025.
초록/해제  
요약Today's soybean producers face many challenges to optimize yield sustainably. Often, farmers are bombarded with marketing claims regarding the use of biostimulant seed treatment (BST); however, there are limited field evaluations on the efficacy of BST in increasing soybean seed yield in the US, and many of the microorganisms included in BST products that are marketed to soybean farmers have never been documented in the peer-reviewed literature. Another challenge farmers face is foliar disease pressure, such as the frogeye leaf spot (FLS) disease (caused by Cercospora sojina). Therefore, optimizing fungicide applications during soybean growth is needed. To address these challenges, this present dissertation aimed to 1) evaluate the use of several commercially available BSTs and their effect on soybean seed yield, plant nutrient status, and seed composition while understanding the influence of environmental conditions and agronomic practices on the results, and 2) optimize foliar fungicide application during soybean reproductive growth stages to prevent yield losses caused by FLS disease. For the first aim, field trials were established using a standard protocol during two soybean growing seasons across 22 states (103 site-years). Depending on the year, seven to nine commercially available BSTs were tested, in addition to an untreated control (UTC). For seed yield analysis, the 103 site-years were separated into four environmental clusters based on weather and soil properties. No significant yield differences were observed due to BST application across and within clusters in both years. Similarly, no differences were found among the treatments for plant nutrient status and seed composition (protein and oil content). For the second aim, small-plot trials were conducted in sixteen locations in Ohio over three years (2022-2024). The study evaluated two cultivars (more tolerant and more susceptible to FLS), two fungicide products (Revytek® and Fitness®), and two application timings (R3 and R5 stages). For analysis, two groups were formed (environments with 0% FLS severity and environments that had FLS severity 0%). Overall, no yield gains by spraying foliar fungicides were identified in environments with no FLS presence. When the tolerant cultivar was planted, and the fungicide Revytek was sprayed at the R3 stage in the group of environments with FLS symptoms, there was a yield difference of +197 kg ha-1 more than the UTC. Additionally, when the susceptible cultivar was planted, the application of Revytek at the R3 stage had the greatest reduction in FLS incidence (-23%) and severity (-0.5%) compared to the UTC. No significant FLS severity reduction was found in the tolerant cultivar. However, foliar fungicide application did not provide an economic return. Overall, results from these experiments showed that BST applications did not increase yield nor affect seed protein and oil content in experimental fields throughout the US. We believe that the lack of yield response may have been due to factors such as competition of active ingredients with native soil microorganisms or lack of favorable conditions for plant-microbe interactions. Additionally, fungicide applications did not influence yield when FLS symptoms were absent and economic return was not identified in trials in Ohio.
일반주제명  
Agronomy
일반주제명  
Agriculture
일반주제명  
Plant pathology
키워드  
Biostimulant seed treatment
키워드  
Cercospora sojina
키워드  
Frogeye leaf spot
키워드  
Plant-microbe interactions
기타저자  
The Ohio State University Horticulture and Crop Science
기본자료저록  
Dissertations Abstracts International. 86-11B.
전자적 위치 및 접속  
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MARC

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■0820  ▼a630
■1001  ▼aColet,  Fabiano.
■24510▼aInfluence  of  Biological  and  Chemical  Inputs  on  Soybean  Seed  Yield  and  Composition
■260    ▼a[Sl]▼bThe  Ohio  State  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a130  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-11,  Section:  B.
■500    ▼aAdvisor:  Lindsey,  Laura  E.
■5021  ▼aThesis  (Ph.D.)--The  Ohio  State  University,  2025.
■520    ▼aToday's  soybean  producers  face  many  challenges  to  optimize  yield  sustainably.  Often,  farmers  are  bombarded  with  marketing  claims  regarding  the  use  of  biostimulant  seed  treatment  (BST);  however,  there  are  limited  field  evaluations  on  the  efficacy  of  BST  in  increasing  soybean  seed  yield  in  the  US,  and  many  of  the  microorganisms  included  in  BST  products  that  are  marketed  to  soybean  farmers  have  never  been  documented  in  the  peer-reviewed  literature.  Another  challenge  farmers  face  is  foliar  disease  pressure,  such  as  the  frogeye  leaf  spot  (FLS)  disease  (caused  by  Cercospora  sojina).  Therefore,  optimizing  fungicide  applications  during  soybean  growth  is  needed.  To  address  these  challenges,  this  present  dissertation  aimed  to  1)  evaluate  the  use  of  several  commercially  available  BSTs  and  their  effect  on  soybean  seed  yield,  plant  nutrient  status,  and  seed  composition  while  understanding  the  influence  of  environmental  conditions  and  agronomic  practices  on  the  results,  and  2)  optimize  foliar  fungicide  application  during  soybean  reproductive  growth  stages  to  prevent  yield  losses  caused  by  FLS  disease.  For  the  first  aim,  field  trials  were  established  using  a  standard  protocol  during  two  soybean  growing  seasons  across  22  states  (103  site-years).  Depending  on  the  year,  seven  to  nine  commercially  available  BSTs  were  tested,  in  addition  to  an  untreated  control  (UTC).  For  seed  yield  analysis,  the  103  site-years  were  separated  into  four  environmental  clusters  based  on  weather  and  soil  properties.  No  significant  yield  differences  were  observed  due to  BST  application  across  and  within  clusters  in  both  years.  Similarly,  no  differences  were  found  among  the  treatments  for  plant  nutrient  status  and  seed  composition  (protein  and  oil  content).  For  the  second  aim,  small-plot  trials  were  conducted  in  sixteen  locations  in  Ohio  over  three  years  (2022-2024).  The  study  evaluated  two  cultivars  (more  tolerant  and  more  susceptible  to  FLS),  two  fungicide  products  (Revytek®  and  Fitness®),  and  two  application  timings  (R3  and  R5  stages).  For  analysis,  two  groups  were  formed  (environments  with  0%  FLS  severity  and  environments  that  had  FLS  severity  0%).  Overall,  no  yield  gains  by  spraying  foliar  fungicides  were  identified  in  environments  with  no  FLS  presence.  When  the  tolerant  cultivar  was  planted,  and  the  fungicide  Revytek  was  sprayed  at  the  R3  stage  in  the  group  of  environments  with  FLS  symptoms,  there  was  a  yield  difference  of  +197  kg  ha-1  more  than  the  UTC.  Additionally,  when  the  susceptible  cultivar  was  planted,  the  application  of  Revytek  at  the  R3  stage  had  the  greatest  reduction  in  FLS  incidence  (-23%)  and  severity  (-0.5%)  compared  to  the  UTC.  No  significant  FLS  severity  reduction  was  found  in  the  tolerant  cultivar.  However,  foliar  fungicide  application  did  not  provide  an  economic  return.  Overall,  results  from  these  experiments  showed  that  BST  applications  did  not  increase  yield  nor  affect  seed  protein  and  oil  content  in  experimental  fields  throughout  the  US.  We  believe  that  the  lack  of  yield  response  may  have  been  due  to  factors  such  as  competition  of  active  ingredients  with  native  soil  microorganisms  or  lack  of  favorable  conditions  for  plant-microbe  interactions.  Additionally,  fungicide  applications  did  not  influence  yield  when  FLS  symptoms  were  absent  and  economic  return  was  not  identified  in  trials  in  Ohio.
■590    ▼aSchool  code:  0168.
■650  4▼aAgronomy
■650  4▼aAgriculture
■650  4▼aPlant  pathology
■653    ▼aBiostimulant  seed  treatment
■653    ▼aCercospora  sojina
■653    ▼aFrogeye  leaf  spot
■653    ▼aPlant-microbe  interactions
■690    ▼a0473
■690    ▼a0285
■690    ▼a0480
■71020▼aThe  Ohio  State  University▼bHorticulture  and  Crop  Science.
■7730  ▼tDissertations  Abstracts  International▼g86-11B.
■790    ▼a0168
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358216▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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