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Dualex是一款源自于法國(guó)國(guó)家科學(xué)院 (CNRS)及巴黎第十一大學(xué)技術(shù),由奧地利PESSL公司生產(chǎn)(原法國(guó)Force-A公司)開(kāi)發(fā)的新型多功能葉片測(cè)量?jī)x。它可同時(shí)準(zhǔn)確測(cè)量葉片的葉綠素含量、葉片表層的類(lèi)黃酮和花青素含量,適用于植物生理學(xué)和農(nóng)學(xué)(如水稻葉綠素濃度,玉米氮素狀況,葡萄藤等)相關(guān)研究。
其測(cè)量對(duì)象可以是單子葉植物,雙子葉植物或多年生植物。這款設(shè)備簡(jiǎn)單易用,可進(jìn)行實(shí)時(shí)和非破壞性測(cè)量。由于不需要校準(zhǔn)標(biāo)定和事先的樣品制備,測(cè)量工作可在實(shí)驗(yàn)室或現(xiàn)場(chǎng)完成。此外,該設(shè)備在各種溫度的和環(huán)境光照條件下均可正常使用。系統(tǒng)光學(xué)傳感器可進(jìn)行簡(jiǎn)單、快速、無(wú)損測(cè)量葉片中的葉綠素、多酚以及花青素。
Dualex便攜式智能氣象-葉綠素-花青素-黃酮醇測(cè)量?jī)x
摘要
背景:應(yīng)用合成螯合物的環(huán)境風(fēng)險(xiǎn)進(jìn)一步推動(dòng)了可生物降解復(fù)合物的實(shí)施,以補(bǔ)充植物錳元缺乏。本研究使用可生物降解的七葡萄糖酸鹽(G7)和葡萄糖酸鹽(G6)配體來(lái)測(cè)試Mn2+:配體比例對(duì)其肥料向植物提供錳的能力的影響。在水培和石灰性土壤條件下,評(píng)估了這些復(fù)合物糾正缺錳大豆的效果,并與合成螯合物EDTA(乙二胺四乙酸)進(jìn)行了比較。
結(jié)果:本研究表明,G7是EDTA的可生物降解替代品,用于供應(yīng)錳,與G6相比,G7保持了充足的營(yíng)養(yǎng)平衡,從而減少了植物對(duì)鐵(Fe)的吸收。Mn配合物的功效取決于配體和Mn:配體比率,根據(jù)其化學(xué)結(jié)構(gòu)和穩(wěn)定性,Mn2+:G7的1:1和1:2摩爾比在短期內(nèi)是*的配合物。
結(jié)論:Mn2+:G7(1:1和1:2)配合物的化學(xué)結(jié)構(gòu)在堿性溶液中具有足夠的穩(wěn)定性和快速作用,是植物營(yíng)養(yǎng)的有效錳源。
關(guān)鍵詞:甘氨酸;缺錳植物;Mn:配體比例;生物可降解配體;葡萄糖酸鹽;七葡萄糖酸鹽。
Implications of the Mn:ligand ratio for Mn uptake by Glycine max L. plants fertilized with heptagluconate and gluconate complexes
Abstract
Background: The environmental risk of the application of synthetic chelates has furthered the implementation of biodegradable complexes to correct manganese (Mn)-deficient plants. This study used the biodegradable ligands of heptagluconate (G7) and gluconate (G6) to test the influence of the Mn2+ :ligand ratio on their fertilizers' capacity to provide Mn to plants. The efficacy of these complexes to correct Mn-deficient soybean was evaluated in hydroponics and calcareous soil conditions and compared with the synthetic chelate EDTA (ethylenediaminetetraacetic acid).
Results: This study demonstrated that G7 was a biodegradable alternative to EDTA for supplying Mn, maintaining an adequate nutritional balance compared with G6, which reduced iron (Fe) uptake by the plants. The efficacy of the Mn complexes depended on both the ligand and the Mn:ligand ratio, with the 1:1 and 1:2 molar ratios of Mn2+ :G7 being the most effective complexes in the short term on the basis of their chemical structure and stability.
Conclusion: The Mn2+ :G7 (1:1 and 1:2) complexes were found to be effective Mn sources for plant nutrition due to their chemical structures providing adequate stability in alkaline solution and their fast-action effect. © 2021 Society of Chemical Industry.
Keywords: Glycine max L.; Mn-deficient plants; Mn:ligand ratio; biodegradable ligands; gluconate; heptagluconate.
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