Dualex植物氮平衡测量仪应用

博普特

2022/05/16 11:03

阅读：17

Dualex是一款源自于法国国家科学院 (CNRS)及巴黎第十一大学技术，由奥地利PESSL公司生产（原法国Force-A公司）开发的新型多功能叶片测量仪。它可同时准确测量叶片的叶绿素含量、叶片表层的类黄酮和花青素含量，适用于植物生理学和农学（如水稻叶绿素浓度，玉米氮素状况，葡萄藤等）相关研究。

其测量对象可以是单子叶植物，双子叶植物或多年生植物。这款设备简单易用，可进行实时和非破坏性测量。由于不需要校准标定和事先的样品制备，测量工作可在实验室或现场完成。此外，该设备在各种温度的和环境光照条件下均可正常使用。系统采用专利设计，光学传感器可进行简单、快速、无损测量叶片中的叶绿素、多酚以及花青素。

Dualex便携式智能气象-叶绿素-花青素-黄酮醇测量仪

摘要：

由于常规施肥造成的环境问题，生物刺激剂被提议作为农业作物营养的环境友好替代品。本研究的目的是确定新型微碳技术（MCT®）肥料对三种不同质地土壤中辣椒植株生长的影响，这种肥料具有基于从莱昂纳多石中生物消化的腐殖酸的生物刺激活性。在西班牙的生长室和商业温室中，在受控条件下进行分析。通过微生物呼吸和酶活性（水解酶、脱氢酶和脲酶）分析施肥后对土壤的影响。对于植物分析，评估了生物特征参数（鲜重和果实硬度）和进行了叶片分析（叶绿素指数和营养素）。在受控条件下，使用这些生物刺激剂可在24小时内提高土壤微生物活性，同时提高土壤酶活性。在植物中，具有生物刺激活性的肥料与叶片的Dualex指数以及大量营养素Ca和Mg的含量呈正相关。在商业温室中，具有生物刺激活性的肥料强烈依赖于土壤质地。综上所述，这些产品在商业生产领域具有取代传统肥料的真正潜力。

Biostimulant Effects of Micro Carbon Technology (MCT®)-Based Fertilizers on Soil and Capsicum annuum Culture in Growth Chamber and Field

Abstract

Due to the environmental issues that conventional fertilization is causing, biostimulants are proposed as environmentally friendly alternative for crop nutrition in agriculture. The aim of this study was to determine the effects of new Micro Carbon Technology (MCT®) fertilizers with biostimulant activity based on humic acids biologically digested from leonardite on pepper plant growth in three different soils with different textures. The assays were performed under controlled conditions in a growth chamber and in commercial greenhouses in Spain. The effects on soil were analyzed after the addition of the fertilizers by microbial respiration and enzymatic activities (hydrolase, dehydrogenase and urease). For the plant assays, biometric parameters (fresh weight and fruit hardness) and foliar analysis (chlorophyll indices and nutrients) were evaluated. Under controlled conditions, the use of these biostimulants resulted in a greater soil microbial activity in a 24 h interval with increased soil enzymatic activity. In plants, a positive correlation was found between fertilizers with biostimulant activity and Dualex indices of leaves and content of macronutrients Ca and Mg. In commercial greenhouses, the fertilizers with biostimulant activity strongly depended on the soil texture. In conclusion, these products have real potential to replace conventional fertilizers in commercial production fields.