자료유형  

 학위논문

Control Number  

0016935198

International Standard Book Number  

9798380714297

Dewey Decimal Classification Number  

761

Main Entry-Personal Name  

Schulker, Brian Alan.

Publication, Distribution, etc. (Imprint  

[S.l.] : North Carolina State University., 2023

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2023

Physical Description  

1 online resource(138 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-05, Section: B.

General Note  

Advisor: Kolar, Praveen S.;Heitman, Joshua L.;Fonteno, William C.;Owen, James S.;Michel, Jean-Charles;Jackson, Brian E.

Dissertation Note  

Thesis (Ph.D.)--North Carolina State University, 2023.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약Containerized production of horticultural crops can enhance plant health, growth, and yield compared to some field-grown crops while also practicing sound environmental production practices. However, the overall sustainability of soilless growing systems requires improved understanding of water and nutrient fluxes and storage within soilless substrates and informed decision making regarding their proper management. My research focused on substrate, both inherent and engineered, hydrologic dynamics of water capture, loss, and movement using a greenhouse load-cell based lysimeter system to understand real-time movement of water through gravimetric weight-based monitoring. We evaluated evaporative water loss of both traditional and alternative substrates as themselves, blended, with and without plants. We also assessed the influence of surface coverings (mulching) on evaporative water loss and post-production handling. From these experiments, through both lab-based and greenhouse testing, we derived results based on substrate, particle size and container cover mulch. Results showed that coconut coir consistently captured higher water contents at initial watering and retention over the multi-day evaporative testing. Through sieve analysis, we found that all materials retained higher water contents as particle size decreased, however this resulted in water loss rates at nearly 40% faster than larger particle sizes. In order to analyze the impact of substrate selection on post-production wilt, sunflowers were grown in peat-based blends of 20%, 40% and 60% wood fiber and 20% perlite. Sunflowers grown in 40% wood fiber had prolonged time to stage 3 wilt by as much as 30 h when compared to 20% perlite. Lastly, we built upon that data by using container coverings (mulches) to evaluate their impact on plant-water use efficiency. This translated to as high as a 50 hour delay in stage 3 wilt for wood chip covered marigolds compared to uncovered and ~25 h delay in rice hull coverings. Overall, plant water use efficiency (mLs of water per gram of plant material) was increased by introducing wood chip coverings to containers throughout production, decreasing the amount of water needed to produce quality crops by 58%. Through the results of this research, we can accurately design methodologies before, during, and post-production to reduce water inputs needed to produce container grown plants and increase survivorship of plants from greenhouse to garden center.

Subject Added Entry-Topical Term  

Wood.

Subject Added Entry-Topical Term  

Leaves.

Subject Added Entry-Topical Term  

Crops.

Subject Added Entry-Topical Term  

Irrigation.

Subject Added Entry-Topical Term  

Horticulture.

Subject Added Entry-Topical Term  

Moisture content.

Subject Added Entry-Topical Term  

Nitrogen.

Subject Added Entry-Topical Term  

Porosity.

Subject Added Entry-Topical Term  

Agriculture.

Subject Added Entry-Topical Term  

Carbon sequestration.

Subject Added Entry-Topical Term  

Mosses.

Subject Added Entry-Topical Term  

Environmental stewardship.

Subject Added Entry-Topical Term  

Sustainability.

Subject Added Entry-Topical Term  

Trees.

Subject Added Entry-Topical Term  

Fruits.

Subject Added Entry-Topical Term  

Plant growth.

Subject Added Entry-Topical Term  

Physical properties.

Subject Added Entry-Topical Term  

Microorganisms.

Subject Added Entry-Topical Term  

Hydraulics.

Subject Added Entry-Topical Term  

Agronomy.

Subject Added Entry-Topical Term  

Environmental engineering.

Subject Added Entry-Topical Term  

Forestry.

Subject Added Entry-Topical Term  

Hydraulic engineering.

Subject Added Entry-Topical Term  

Industrial engineering.

Subject Added Entry-Topical Term  

Microbiology.

Subject Added Entry-Topical Term  

Plant sciences.

Subject Added Entry-Topical Term  

Wood sciences.

Added Entry-Corporate Name  

North Carolina State University.

Host Item Entry  

Dissertations Abstracts International. 85-05B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:643897