자료유형  

 학위논문

Control Number  

0016932015

International Standard Book Number  

9798379713287

Dewey Decimal Classification Number  

630

Main Entry-Personal Name  

Ann Gannett, Maria.

Publication, Distribution, etc. (Imprint  

[S.l.] : Cornell University., 2023

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2023

Physical Description  

1 online resource(219 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 84-12, Section: B.

General Note  

Advisor: Kao-Kniffin, Jenny.

Dissertation Note  

Thesis (Ph.D.)--Cornell University, 2023.

Restrictions on Access Note  

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

Summary, Etc.  

요약The activity of soil microorganisms can be harnessed to promote agricultural sustainability. One such microbial approach, referred to as reverse fertilization, incorporates large quantities of high carbon:nitrogen (C:N) plant residues into the soil. The carbon amendment stimulates the growth of soil microorganisms and triggers microbial scavenging of soil nitrogen, resulting in nitrogen immobilization within microbial cells. Immobilized nitrogen is temporarily unavailable for plant uptake. Most research on this technique has involved controlling invasive plants to reestablish native plant communities that are sensitive to soils with high nitrogen fertility. The approach should be applicable to the management of agricultural weeds, particularly for nitrophilous species. We conducted one greenhouse and two field-based experiments exploring the potential of reverse fertilization as an agricultural weed management tool. We observed evidence of nitrogen immobilization in soils amended with high C:N amendments, including higher microbial biomass and respiration, and decreased plant-available soil nitrate. We also observed functional changes in the soil microbial community, primarily based on soil amendment treatment. Fungal and bacterial beta diversity were strongly influenced by the soil amendment treatment, with a consistent decrease in fungal alpha diversity in carbon amended soils. We also observed a consistent reduction in growth and competitive ability of nitrogen-responsive weeds in carbon amended soils compared to unamended soils. We found altered functional traits of the weed community based on soil amendment treatments in our field experiment. The results from the three experiments indicate the ability of nitrogen immobilization to become a useful component of an integrated weed management program, with increasing potential as digital agriculture integrates multiple and simultaneous ecological crop management options.

Subject Added Entry-Topical Term  

Agriculture.

Subject Added Entry-Topical Term  

Ecology.

Subject Added Entry-Topical Term  

Soil sciences.

Index Term-Uncontrolled  

Carbon amendments

Index Term-Uncontrolled  

Crop-weed competition

Index Term-Uncontrolled  

Nitrogen immobilization

Index Term-Uncontrolled  

Soil microbiology

Index Term-Uncontrolled  

Weed ecology

Added Entry-Corporate Name  

Cornell University Horticulture

Host Item Entry  

Dissertations Abstracts International. 84-12B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:640749