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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
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
- 기타저자
- The Ohio State University Horticulture and Crop Science
- 기본자료저록
- Dissertations Abstracts International. 86-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103700
■006m o d
■007cr#unu||||||||
■020 ▼a9798314896631
■035 ▼a(MiAaPQ)AAI32112139
■035 ▼a(MiAaPQ)OhioLINKosu1744643697217255
■040 ▼aMiAaPQ▼cMiAaPQ
■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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