東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Integrating Cover Crops and Almond H...

Cho, Sydney.

FindBook

Google Book

Amazon

博客來

Integrating Cover Crops and Almond Hulls and Shells as Organic Matter Amendments for Whole Orchard Regenerative Management.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Integrating Cover Crops and Almond Hulls and Shells as Organic Matter Amendments for Whole Orchard Regenerative Management./
作者:	Cho, Sydney.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2024,
面頁冊數:	78 p.
附註:	Source: Masters Abstracts International, Volume: 86-02.
Contained By:	Masters Abstracts International86-02.
標題:	Plant sciences. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31328302
ISBN:	9798383609835

Integrating Cover Crops and Almond Hulls and Shells as Organic Matter Amendments for Whole Orchard Regenerative Management.
Cho, Sydney.

Integrating Cover Crops and Almond Hulls and Shells as Organic Matter Amendments for Whole Orchard Regenerative Management. - Ann Arbor : ProQuest Dissertations & Theses, 2024 - 78 p.

Source: Masters Abstracts International, Volume: 86-02.

Thesis (M.S.)--University of California, Davis, 2024.

Regenerative agricultural practices strive to produce food that have lower economic, environmental, and social impacts defined by the processes used (i.e. using cover crops, reducing tillage) or by proposed outcomes (i.e. improving soil health, improving biodiversity). In almond orchards the regeneration of ecosystem health and productivity can be achieved through practices including recycling of almond hull and shell resources as soil amendments, reducing dust production during harvest, and minimizing synthetic fertilizer inputs. The current and set standards of conventional almond production poses a unique challenge when proposing regenerative agriculture goals. To facilitate almond harvest and simplify irrigation and fertigation practices, almond orchards are typically managed with the orchard floor bare, and trees are grown in rows with irrigation and fertilization localized exclusively to the 3.6 meter (12-ft) wide soil strip below the tree canopy. The alleyways are often left unirrigated and bare to facilitate almond harvest. These conventional practices reduce soil health, whereas with the advent of off-ground harvesting, opportunities exist to incorporate cover crops (CC) and the use of organic matter amendments (OMA) including almond hulls and shells (AHS) to maintain a more permanent mulch layer to protect the soil. This thesis examined the changes in soil physical, chemical, and biological properties from the use of AHS and a CC mix of 60% oats, 35% spring peas, and 5% yellow mustard in a randomized complete block design field trial. Nutrient cycling and OMA decomposition dynamics was analyzed one and two years after practice adoption. Effects on soil aggregate stability, particulate organic matter (POM), mineral associated organic matter (MAOM), microbial biomass, and soil moisture in amended trees harvested using on-ground and off-ground harvest machines were determined. Results showed increased C and N in microaggregate and macroaggregate soil organic matter fractions, increased saprophytes and arbuscular mycorrhizal fungi, and improved soil moisture in amended soils. Exchangeable potassium (XK) and soil organic matter (SOM) increased in the amended on and off-ground harvest treatments and was highly correlated with microbial communities measured. We found that after 3 years of AHS OMA and catch-frame harvest, MAOM and soil aggregate stability increased due to this undisturbed forest litter layer which may allow more microbial processes to contribute to more MAOM over time. Cover crop biomass was highest in oats but peas contributed the highest soil N. 192 days after AHS application, an average of 38% of the AHS material decomposed and 90 days after the CC were seeded, an average of 69% of the CC material decomposed.

ISBN: 9798383609835Subjects--Topical Terms:

3173832
Plant sciences.
Subjects--Index Terms:

Cover crops

Integrating Cover Crops and Almond Hulls and Shells as Organic Matter Amendments for Whole Orchard Regenerative Management.
LDR:03962nmm a2200385 4500 001 2403508
005 20241118085754.5
006 m o d
007 cr#unu||||||||
008 251215s2024 ||||||||||||||||| ||eng d
020 $a 9798383609835
035 $a (MiAaPQ)AAI31328302
035 $a AAI31328302
040 $a MiAaPQ $c MiAaPQ
100 1 $a Cho, Sydney. $3 3773781
245 1 0 $a Integrating Cover Crops and Almond Hulls and Shells as Organic Matter Amendments for Whole Orchard Regenerative Management.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 78 p.
500 $a Source: Masters Abstracts International, Volume: 86-02.
500 $a Advisor: Brown, Patrick H.
502 $a Thesis (M.S.)--University of California, Davis, 2024.
520 $a Regenerative agricultural practices strive to produce food that have lower economic, environmental, and social impacts defined by the processes used (i.e. using cover crops, reducing tillage) or by proposed outcomes (i.e. improving soil health, improving biodiversity). In almond orchards the regeneration of ecosystem health and productivity can be achieved through practices including recycling of almond hull and shell resources as soil amendments, reducing dust production during harvest, and minimizing synthetic fertilizer inputs. The current and set standards of conventional almond production poses a unique challenge when proposing regenerative agriculture goals. To facilitate almond harvest and simplify irrigation and fertigation practices, almond orchards are typically managed with the orchard floor bare, and trees are grown in rows with irrigation and fertilization localized exclusively to the 3.6 meter (12-ft) wide soil strip below the tree canopy. The alleyways are often left unirrigated and bare to facilitate almond harvest. These conventional practices reduce soil health, whereas with the advent of off-ground harvesting, opportunities exist to incorporate cover crops (CC) and the use of organic matter amendments (OMA) including almond hulls and shells (AHS) to maintain a more permanent mulch layer to protect the soil. This thesis examined the changes in soil physical, chemical, and biological properties from the use of AHS and a CC mix of 60% oats, 35% spring peas, and 5% yellow mustard in a randomized complete block design field trial. Nutrient cycling and OMA decomposition dynamics was analyzed one and two years after practice adoption. Effects on soil aggregate stability, particulate organic matter (POM), mineral associated organic matter (MAOM), microbial biomass, and soil moisture in amended trees harvested using on-ground and off-ground harvest machines were determined. Results showed increased C and N in microaggregate and macroaggregate soil organic matter fractions, increased saprophytes and arbuscular mycorrhizal fungi, and improved soil moisture in amended soils. Exchangeable potassium (XK) and soil organic matter (SOM) increased in the amended on and off-ground harvest treatments and was highly correlated with microbial communities measured. We found that after 3 years of AHS OMA and catch-frame harvest, MAOM and soil aggregate stability increased due to this undisturbed forest litter layer which may allow more microbial processes to contribute to more MAOM over time. Cover crop biomass was highest in oats but peas contributed the highest soil N. 192 days after AHS application, an average of 38% of the AHS material decomposed and 90 days after the CC were seeded, an average of 69% of the CC material decomposed.
590 $a School code: 0029.
650 4 $a Plant sciences. $3 3173832
650 4 $a Soil sciences. $3 2122699
650 4 $a Agronomy. $3 2122783
650 4 $a Horticulture. $3 555447
653 $a Cover crops
653 $a Fertilizer management strategies
653 $a Soil organic matter
653 $a Water management
690 $a 0479
690 $a 0481
690 $a 0285
690 $a 0471
710 2 $a University of California, Davis. $b Horticulture and Agronomy. $3 1676792
773 0 $t Masters Abstracts International $g 86-02.
790 $a 0029
791 $a M.S.
792 $a 2024
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31328302