Effect of Hydrolysate Derived from Subcritical Seawater Treatment of Buckwheat Waste on the Growth of Lettuce (<i>Lactuca sativa</i> L.)

This study explores the effects of a subcritical seawater treatment (SST) on buckwheat waste (BW), and the use of the hydrolysate as a liquid fertilizer to improve the growth of lettuce (<i>Lactuca sativa</i> L.). Three temperature treatments (110 °C, 170 °C, 230 °C) were used for the SS...

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Main Authors: Yongheng Yuan, Faqinwei Li, Naoto Shimizu
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Plants
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Online Access:https://www.mdpi.com/2223-7747/14/2/149
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author Yongheng Yuan
Faqinwei Li
Naoto Shimizu
author_facet Yongheng Yuan
Faqinwei Li
Naoto Shimizu
author_sort Yongheng Yuan
collection DOAJ
description This study explores the effects of a subcritical seawater treatment (SST) on buckwheat waste (BW), and the use of the hydrolysate as a liquid fertilizer to improve the growth of lettuce (<i>Lactuca sativa</i> L.). Three temperature treatments (110 °C, 170 °C, 230 °C) were used for the SST, and the ionic composition in the seawater achieved the depolymerization and degradation of BW. The X-ray diffraction of the residual solids showed that the structure of BW was destroyed. Compared with seawater, the hydrolysate contained higher amounts of elements beneficial to plant growth, such as N, P, K, and organic compounds such as phenolics and sugars, as a result of the degradation of BW caused by the SST. The hydrolysate was tested as a liquid fertilizer (treatments H<sub>110°C</sub>, H<sub>170°C</sub>, H<sub>230°C</sub>) to irrigate lettuce. The content of proteins, phenolics, and chlorophyll, as well as the weight of the lettuce in the H<sub>110°C</sub> and H<sub>170°C</sub> treatments, were significantly higher than those in the seawater and the H<sub>230°C</sub> irrigation treatments (<i>p</i> < 0.05). The hydrolysate from the SST of BW, being rich in various organic and inorganic nutrients, can act as a liquid fertilizer that promotes the growth of lettuce, whereas hydrolysate from higher SST temperatures might inhibit the growth of lettuce, because of the excessive total nitrogen and organic acid.
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spelling doaj-art-25719cd056f9415d8014a915c816e9882025-01-24T13:46:31ZengMDPI AGPlants2223-77472025-01-0114214910.3390/plants14020149Effect of Hydrolysate Derived from Subcritical Seawater Treatment of Buckwheat Waste on the Growth of Lettuce (<i>Lactuca sativa</i> L.)Yongheng Yuan0Faqinwei Li1Naoto Shimizu2Institute of Modern Agricultural Equipment, Xihua University, Chengdu 610039, ChinaInstitute of Modern Agricultural Equipment, Xihua University, Chengdu 610039, ChinaResearch Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, JapanThis study explores the effects of a subcritical seawater treatment (SST) on buckwheat waste (BW), and the use of the hydrolysate as a liquid fertilizer to improve the growth of lettuce (<i>Lactuca sativa</i> L.). Three temperature treatments (110 °C, 170 °C, 230 °C) were used for the SST, and the ionic composition in the seawater achieved the depolymerization and degradation of BW. The X-ray diffraction of the residual solids showed that the structure of BW was destroyed. Compared with seawater, the hydrolysate contained higher amounts of elements beneficial to plant growth, such as N, P, K, and organic compounds such as phenolics and sugars, as a result of the degradation of BW caused by the SST. The hydrolysate was tested as a liquid fertilizer (treatments H<sub>110°C</sub>, H<sub>170°C</sub>, H<sub>230°C</sub>) to irrigate lettuce. The content of proteins, phenolics, and chlorophyll, as well as the weight of the lettuce in the H<sub>110°C</sub> and H<sub>170°C</sub> treatments, were significantly higher than those in the seawater and the H<sub>230°C</sub> irrigation treatments (<i>p</i> < 0.05). The hydrolysate from the SST of BW, being rich in various organic and inorganic nutrients, can act as a liquid fertilizer that promotes the growth of lettuce, whereas hydrolysate from higher SST temperatures might inhibit the growth of lettuce, because of the excessive total nitrogen and organic acid.https://www.mdpi.com/2223-7747/14/2/149subcritical seawater hydrolysisbuckwheat wasteorganic componentsnutrient elementslettuce (<i>Lactuca sativa</i> L.)
spellingShingle Yongheng Yuan
Faqinwei Li
Naoto Shimizu
Effect of Hydrolysate Derived from Subcritical Seawater Treatment of Buckwheat Waste on the Growth of Lettuce (<i>Lactuca sativa</i> L.)
Plants
subcritical seawater hydrolysis
buckwheat waste
organic components
nutrient elements
lettuce (<i>Lactuca sativa</i> L.)
title Effect of Hydrolysate Derived from Subcritical Seawater Treatment of Buckwheat Waste on the Growth of Lettuce (<i>Lactuca sativa</i> L.)
title_full Effect of Hydrolysate Derived from Subcritical Seawater Treatment of Buckwheat Waste on the Growth of Lettuce (<i>Lactuca sativa</i> L.)
title_fullStr Effect of Hydrolysate Derived from Subcritical Seawater Treatment of Buckwheat Waste on the Growth of Lettuce (<i>Lactuca sativa</i> L.)
title_full_unstemmed Effect of Hydrolysate Derived from Subcritical Seawater Treatment of Buckwheat Waste on the Growth of Lettuce (<i>Lactuca sativa</i> L.)
title_short Effect of Hydrolysate Derived from Subcritical Seawater Treatment of Buckwheat Waste on the Growth of Lettuce (<i>Lactuca sativa</i> L.)
title_sort effect of hydrolysate derived from subcritical seawater treatment of buckwheat waste on the growth of lettuce i lactuca sativa i l
topic subcritical seawater hydrolysis
buckwheat waste
organic components
nutrient elements
lettuce (<i>Lactuca sativa</i> L.)
url https://www.mdpi.com/2223-7747/14/2/149
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AT faqinweili effectofhydrolysatederivedfromsubcriticalseawatertreatmentofbuckwheatwasteonthegrowthoflettuceilactucasativail
AT naotoshimizu effectofhydrolysatederivedfromsubcriticalseawatertreatmentofbuckwheatwasteonthegrowthoflettuceilactucasativail