國立虎尾科技大學 |

A Survey of the Effects of Nutrient Spatial Distribution Under Heterogeneous Rootzone Salinity in Tomato.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	A Survey of the Effects of Nutrient Spatial Distribution Under Heterogeneous Rootzone Salinity in Tomato./
作者:	Leventini, Dante.
面頁冊數:	1 online resource (65 pages)
附註:	Source: Masters Abstracts International, Volume: 85-08.
Contained By:	Masters Abstracts International85-08.
標題:	Soil sciences. -
電子資源:	click for full text (PQDT)
ISBN:	9798381714104

A Survey of the Effects of Nutrient Spatial Distribution Under Heterogeneous Rootzone Salinity in Tomato.
Leventini, Dante.

A Survey of the Effects of Nutrient Spatial Distribution Under Heterogeneous Rootzone Salinity in Tomato. - 1 online resource (65 pages)

Source: Masters Abstracts International, Volume: 85-08.

Thesis (M.S.)--University of California, Davis, 2023.

Includes bibliographical references

This thesis explores the broad physiological responses of tomato (Solanum lycopersicum) in solution culture to various spatial potassium (K) distributions under heterogeneous rootzone salinity (NaCl). Chapter 1 is a collaborative review of heterogeneous soil salinity, introducing how management and environment influence salt distribution patterns, and reviews ensuing physiological responses. The review also summarizes the limited research on interactions between heterogeneous salinity and nutrient distribution, particularly split-root experiments, a line of inquiry which this research seeks to enrich. Chapter 2 outlines an original experiment where tomato plants were grown in solution culture with roots evenly divided between two compartments. Except for a salt-free control group (Treatment 0), the same overall amount of salt (NaCl) was either provided to the plant uniformly across the entire root zone (treatment 1) or provided to only one half of the root system (treatments 2, 3, and 4). Treatments 2, 3, and 4 feature an increase in the share of the K budget which is supplemented in the saline compartment compared to the non-saline compartment. Treatment 2 provides nutrients including K to one side and NaCl to the other. Treatments 3 and 4 increase K in the saline compartment to 40% and 80% of the K budget, respectively. The impacts on biomass accumulation, biomass partitioning, water uptake, sodium uptake, and potassium uptake were measured and analyzed for statistical significance. There was no difference in the total biomass, overall water uptake rate, or root distribution between root halves across uniform treatment groups (0 and 1) despite a major difference in overall solution NaCl concentration (0 mM and 20 mM average, respectively). In all treatments where supplemented sodium (40 mM) was confined to half of the root zone (2, 3, and 4), plant water uptake was restricted almost completely to the non-saline compartment demonstrating a remarkable plasticity of root response to local saline conditions. Whole plant water uptake rates were generally comparable irrespective of saline distribution. Saline compartments of treatments 2, 3, and 4 did not show sodium or potassium uptake, regardless of potassium richness. Across all treatments, there was a strong tendency for water, and potassium uptake, as well as root growth, to occur in the Na-free compartment.The only instance of plants utilizing solution K in the presence of NaCl occurred in treatment 1, where K was supplemented along with all other nutrients uniformly in an overall saline root environment. Interestingly, this treatment was also the only clear instance of sodium uptake to occur among any treatment groups.The results of these experiments suggest a salt-avoidant response, whereby the presence of any salt-free and nutrient-rich root zone will result in preferential water uptake from that zone. Research (summarized in Chapter 1) also demonstrates that the provision of a full nutrient supply exclusively to the saline side of a split root system will result in considerable water uptake from the saline compartment and increase whole plant salt uptake. This research was conducted to determine which of the nutrients in the nutrient-rich zone was responsible for plant activity in the saline zone that may otherwise have been avoided. The research performed here demonstrates that the driving dynamic for this plant response is not K alone. The goals of minimizing the incidence of salinity stress and maximizing nutrient use efficiency are inextricable in the agronomic system. Understanding the relationship between nutrient use and salt localization is important if we are to optimize management systems under the heterogeneous ion distributions that are commonplace in irrigated agriculture.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798381714104Subjects--Topical Terms:

1179645
Soil sciences.
Subjects--Index Terms:

HeterogeneousIndex Terms--Genre/Form:

554714
Electronic books.

A Survey of the Effects of Nutrient Spatial Distribution Under Heterogeneous Rootzone Salinity in Tomato.
LDR:05233ntm a22004337 4500 001 1151684
005 20241118085733.5
006 m o d
007 cr mn ---uuuuu
008 250605s2023 xx obm 000 0 eng d
020 $a 9798381714104
035 $a (MiAaPQ)AAI30816574
035 $a AAI30816574
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Leventini, Dante. $3 1478497
245 1 2 $a A Survey of the Effects of Nutrient Spatial Distribution Under Heterogeneous Rootzone Salinity in Tomato.
264 0 $c 2023
300 $a 1 online resource (65 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 85-08.
500 $a Advisor: Brown, Patrick H.
502 $a Thesis (M.S.)--University of California, Davis, 2023.
504 $a Includes bibliographical references
520 $a This thesis explores the broad physiological responses of tomato (Solanum lycopersicum) in solution culture to various spatial potassium (K) distributions under heterogeneous rootzone salinity (NaCl). Chapter 1 is a collaborative review of heterogeneous soil salinity, introducing how management and environment influence salt distribution patterns, and reviews ensuing physiological responses. The review also summarizes the limited research on interactions between heterogeneous salinity and nutrient distribution, particularly split-root experiments, a line of inquiry which this research seeks to enrich. Chapter 2 outlines an original experiment where tomato plants were grown in solution culture with roots evenly divided between two compartments. Except for a salt-free control group (Treatment 0), the same overall amount of salt (NaCl) was either provided to the plant uniformly across the entire root zone (treatment 1) or provided to only one half of the root system (treatments 2, 3, and 4). Treatments 2, 3, and 4 feature an increase in the share of the K budget which is supplemented in the saline compartment compared to the non-saline compartment. Treatment 2 provides nutrients including K to one side and NaCl to the other. Treatments 3 and 4 increase K in the saline compartment to 40% and 80% of the K budget, respectively. The impacts on biomass accumulation, biomass partitioning, water uptake, sodium uptake, and potassium uptake were measured and analyzed for statistical significance. There was no difference in the total biomass, overall water uptake rate, or root distribution between root halves across uniform treatment groups (0 and 1) despite a major difference in overall solution NaCl concentration (0 mM and 20 mM average, respectively). In all treatments where supplemented sodium (40 mM) was confined to half of the root zone (2, 3, and 4), plant water uptake was restricted almost completely to the non-saline compartment demonstrating a remarkable plasticity of root response to local saline conditions. Whole plant water uptake rates were generally comparable irrespective of saline distribution. Saline compartments of treatments 2, 3, and 4 did not show sodium or potassium uptake, regardless of potassium richness. Across all treatments, there was a strong tendency for water, and potassium uptake, as well as root growth, to occur in the Na-free compartment.The only instance of plants utilizing solution K in the presence of NaCl occurred in treatment 1, where K was supplemented along with all other nutrients uniformly in an overall saline root environment. Interestingly, this treatment was also the only clear instance of sodium uptake to occur among any treatment groups.The results of these experiments suggest a salt-avoidant response, whereby the presence of any salt-free and nutrient-rich root zone will result in preferential water uptake from that zone. Research (summarized in Chapter 1) also demonstrates that the provision of a full nutrient supply exclusively to the saline side of a split root system will result in considerable water uptake from the saline compartment and increase whole plant salt uptake. This research was conducted to determine which of the nutrients in the nutrient-rich zone was responsible for plant activity in the saline zone that may otherwise have been avoided. The research performed here demonstrates that the driving dynamic for this plant response is not K alone. The goals of minimizing the incidence of salinity stress and maximizing nutrient use efficiency are inextricable in the agronomic system. Understanding the relationship between nutrient use and salt localization is important if we are to optimize management systems under the heterogeneous ion distributions that are commonplace in irrigated agriculture.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Soil sciences. $3 1179645
650 4 $a Physiology. $3 673386
650 4 $a Agriculture. $3 660421
650 4 $a Horticulture. $3 1058420
650 4 $a Plant sciences. $3 1179743
653 $a Heterogeneous
653 $a Plant nutrition
653 $a Potassium
653 $a Roots
653 $a Salinity
653 $a Tomato
655 7 $a Electronic books. $2 local $3 554714
690 $a 0479
690 $a 0471
690 $a 0473
690 $a 0481
690 $a 0719
710 2 $a University of California, Davis. $b Plant Biology. $3 1190574
710 2 $a ProQuest Information and Learning Co. $3 1178819
773 0 $t Masters Abstracts International $g 85-08.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30816574 $z click for full text (PQDT)