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Johannes F.J. Max

Johannes F.J. Max
Hochschule Weihenstephan-Triesdorf - University of Applied Sciences · Institute of Horticulture

Prof. Dr.

About

50
Publications
27,324
Reads
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468
Citations
Citations since 2017
17 Research Items
313 Citations
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
Additional affiliations
January 2014 - December 2019
Hochschule Geisenheim University
Position
  • Managing Director

Publications

Publications (50)
Article
A combination of anti-reflection coated glass and ethylene tetrafluoroethylene film is introduced as a novel glazing system for greenhouses and similar buildings. It combines the advantages of the individual materials (durability/low weight; favourable condensation behaviour/self-cleaning) and of single and double layer systems (light transmission/...
Article
Black leaf mold caused by Pseudocercospora fuligena is an important fungal disease of tomato in Southeast Asia. The objective of this study was to evaluate the control of this disease using high manganese (Mn) applied to the root substrate and to evaluate the role of the leaf apoplast in plant response to fungal infection. In a nethouse experiment...
Article
The influence of the electrical conductivity (EC) of the substrate solution during the night, i.e., moderately high EC (“HEC”, 3.0 dS m–1, full solution) and low EC (“LEC”, 0.5 dS m–1, CaCl2 or Ca(NO3)2 and H3BO3), on the incidences of blossom-end rot (BER) and fruit cracking (FC) in greenhouse tomato (Solanum lycopersicum L.) was investigated and...
Article
A tomato (Solanum lycopersicum L.) crop was grown in four greenhouses during the dry season 2005/06 in Central Thailand. Sidewalls and roof vents of two greenhouses were covered with nets and these greenhouses were mechanically ventilated when air temperature exceeded 30 °C (NET). The other two greenhouses were covered with polyethylene film and eq...
Preprint
Full-text available
Under the impression of changing rainfall patterns, agriculture in Germany faces increasing drought stress problems and water saving irrigation is gaining importance in the agricultural practice. Porous pipes for subsurface irrigation are an innovative method which is promoted as a water-efficient way to apply irrigation water. In the present study...
Article
Full-text available
Cascade hydroponics, that is, the application of the circular economy concept in greenhouse hydroponic crops, may be considered as an alternative means to increase water and nutrient use efficiency in greenhouses. In such systems, the drained nutrient solution from a crop may be used as input in a second crop. However, the second (secondary) crop i...
Article
Full-text available
In a cascade hydroponic system, the used nutrient solution drained from a primary crop is directed to a secondary crop, enhancing resource-use efficiency while minimizing waste. Nevertheless, the inevitably increased EC of the drainage solution requires salinity-tolerant crops. The present study explored the salinity-tolerance thresholds of basil t...
Article
Full-text available
The circular economy in agriculture aims to reduce waste while also making best use of residues by using economically viable processes and procedures to increase their value. In this study a two-level cascade cultivation system was set up under greenhouse conditions. The research was focused on the identification of crop species as secondary crops...
Conference Paper
Full-text available
The covering material used on a greenhouse is essential to provide a suitable environment for plant growth. Glass has long been one of the most widely used materials in greenhouses but there are increasing attempts to further improve its quality in order to optimize plant production. This survey focuses on how four different glass cover materials a...
Conference Paper
Full-text available
In dem vom Land Hessen im Rahmen von LOEWE 3 geförderten Projekt (HA-Projekt-Nr.: 493/16-05) „GIFpro – Grobvakuum-Isolierglas-Fertigbausystem: prototypische Umsetzung und Evaluierung eines Eindeckungssystems für Gewächshäuser (und andere Gebäude mit Tageslichtnutzung)“ werden vakuumgedämmte Gewächshaus-Fertigbauelemente mit Solarglas und einem Rahm...
Conference Paper
Full-text available
Leaf reflectance characteristics of peppermint (Mentha x piperita L.) are influenced by manganese availability that affects monoterpene production. Monoterpenes produced by peppermint exhibit many ecological roles, including antimicrobial, antioxidant and anti-inflammatory, as well as anti-ulcer and insecticidal properties. The main objective of th...
Article
Full-text available
Purple carrots are rich in anthocyanins which are interesting as natural dyes in food and beverages. It is, thus, relevant to increase the concentration of anthocyanins by agricultural practices. We tested whether the combination of reduced nitrogen (N) supply and extended harvesting periods maximized the anthocyanin concentration of purple carrot...
Poster
Full-text available
Supraoptimale Manganversorgung bewirkt eine Zunahme der antioxidativen Kapazität in Pfefferminzblättern
Article
Full-text available
The effects of a shading paint containing NIR-reflecting pigments applied to the roof of an experimental greenhouse on greenhouse microclimate, plant response of a tomato crop and fruit yield and quality were studied under the tropical climate conditions of Central Thailand. One experiment was carried out in the rainy (2006) season and in the dry (...
Article
Summary 1.Plant species that arrive first in the system can affect assembly (priority effects). However, effects of order of arrival of different plant functional groups on root development has not yet been investigated under field conditions. 2.We measured standing and fine root length density in the first and third year of a grassland field exper...
Article
Full-text available
The combined effects of shoot pruning (one or two stems) and inflorescence thinning (five or ten flowers per inflorescence) on greenhouse tomato yield and fruit quality were studied during the dry season (DS) and rainy season (RS) in Central Thailand. Poor fruit set, development of undersized (mostly parthenocarpic) fruits, as well as the physiolog...
Article
Full-text available
ABSTACT First constructed two and a half centuries ago, the hydraulic ram is one of the oldest mechanical devices for water lifting. The first application utilised the principle for the water supply of a brewery. In this set up a water valve had to be manually closed. Very soon upgrades for an automatic operation of the device were adapted. With te...
Article
Full-text available
Light curtain arrays (LC), a recently introduced phenotyping method, yield a binary data matrix from which a shoot silhouette is reconstructed. We addressed the accuracy and applicability of LC in assessing leaf area and maximum height (base to the highest leaf tip) in a phenotyping platform. LC were integrated to an automated routine for positioni...
Article
Full-text available
Light is an important growth factor in greenhouses. The choice of a covering material strongly influences the light transmittance of a greenhouse. For low energy greenhouses double and even triple covering materials are available. Also covering materials with higher light transmittances than conventional float glass are available. When these materi...
Chapter
Beginning in the 1950s greenhouse horticulture expandedrapidly fromtemperate climate zones to the subtropics and tropics. As a result of the tremendous diversification of application fields for greenhouses, the diversity of greenhouse covering materials has increased dramatically. The current number of new products entering the markets is growing c...
Article
Full-text available
Light is an important growth factor in greenhouses. The choice of a covering material strongly influences the light transmittance of a greenhouse. For low energy greenhouses double and even triple covering materials are available. Also covering materials with higher light transmittances than conventional float glass are available. When these materi...
Chapter
Beginning in the 1950s greenhouse horticulture expandedrapidly fromtemperate climate zones to the subtropics and tropics. As a result of the tremendous diversification of application fields for greenhouses, the diversity of greenhouse covering materials has increased dramatically. The current number of new products entering the markets is growing c...
Conference Paper
Blossom-end rot (BER) and fruit cracking (FC) are prevalent disorders in tomato. It is widely accepted that a local Ca deficiency in the distal half of the fruits during the initial stage of fruit development is the main cause for BER. High fruit extension-growth particularly through excessive water uptake appears to be a main reason for FC. High l...
Article
Studies were conducted in tropical greenhouses to elucidate the role of UV light (UV) for the orientation and flight behavior of the thrips Ceratothripoides claratris (Shumsher) (Thysanoptera: Thripidae), an important pest on tomato (Lycopersicum spp.), in the hot and humid tropics of South-East Asia. Four greenhouse types characterized by differen...
Article
Full-text available
Studies were conducted in tropical greenhouses to elucidate the role of UV light (UV) for the orientation and flight behavior of the thrips Ceratothripoides claratris (Shumsher) (Thysanoptera: Thripidae), an important pest on tomato (Lycopersicum spp.), in the hot and humid tropics of South-East Asia. Four greenhouse types characterized by differen...
Conference Paper
In dieser Arbeit wurde der Einfluss einer kombinierten Calcium und Borspritzung auf Fruchtertrag und Qualität von Tomaten (Lycopersicon esculentum Mill.) unter geschütztem Anbau in Zentralthailand untersucht. Dafür wurden die zwei Tomatensorten King Kong 2 (KK2) und FMTT 260 (FMTT) in Netzgewächshäusern angebaut und ihre Früchte mit einer Ca-/B- Lö...
Article
Two tomato (Lycopersicon esculentum Mill.) cultivars King Kong 2 (KK2) and FMTT 260 (FMTT) were grown in a net-covered greenhouse in Central Thailand to investigate the influence of fruit applications of combined aqueous calcium (Ca) and boron (B) solutions amended or not with the tenside Glucopon® on fruit yield and quality. Special attention was...
Article
Full-text available
Blocking the near infra-red (NIR) portion of the global radiation from entering a greenhouse is one of the emerging environmentally friendly and economical ways of reducing greenhouse temperature without increasing the humidity. In this study, the effect of cooling greenhouses by NIR-reflection on the microclimate, fruit quality and growth of tomat...
Conference Paper
Full-text available
Cooling greenhouses in the humid tropics is especially challenging due to the high intensity of solar radiation and humidity prevalent in these regions. The effect of natural ventilation and evaporative cooling on the greenhouse microclimate, growth and production of tomato Solanum lycopersicum cv FMTT260 were evaluated. The research was carried ou...
Thesis
Full-text available
Net production and changes in root length over time of winter oilseed rape (Brassica napus L. var. Falcon) were investigated during three successive years at the experimental farm at Hohenschulen in the northern part of Germany (54° 16‘ N, 9° 53‘ E). This study was part of the Special Research Foundation Program No. 192 at the University of Kiel. T...
Chapter
Full-text available
Rhizodeposition is considered to be an important source for soil organic carbon. Increased root turnover rates may be a mechanism employed by plants to respond to nutrient limiting conditions. Estimation of rhizodeposition for field-grown oilseed-rape plants (Brassica napus L.) using 14C-pulse labelling technique was the objective of our present wo...
Article
Full-text available
Generally it is not customary to have a nutrient recycling system for the tropical poly-net greenhouses. The main reason is the cost involved. However, due to recent growing environmental concerns, efforts were made in this study to develop a simple but effective nutrient recycling system. Tomato (Lycopersicon esculentum Mill., var. FMTT-260) plant...

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Projects

Projects (6)
Project
The overarching Goal of this projet is productively using the entire quantity of water and fertilizers supplied to greenhouse crops and thereby bringing the discharge of effluents from hydroponic production systems and associated environmental pollution to an end. The CasH-approach addresses these issues: Exemplarily tomato and cucumber will be used as main (=”primary”) crops and additional, less demanding, secondary crops (e.g. peppermint and basil) will be integrated and fertigated using the drainage nutrient solution of the primary crop. Salt tolerant vegetables such as glasswort (Salicornia L.) or sea aster (Tripolium pannonicum [Jacq.] Dobrocz), which are a high value crops with a growing market share, will conclude this serial production system at the “downstream-end” as the tertiary crop.
Project
Objectives: • Extending and strengthening the cooperation between the partners in Greece and Germany • Joint research and teaching activities in the field of “protected cultivation” The following topics are given priority: • Evaluation of novel greenhouse covering materials with regard to light transmission, heat transition and manipulation of photomorphogenic plant responses • Improvement of open irrigation systems (irrigation technology, irrigation strategies, disinfection of irrigation water etc.) • Modelling approaches (greenhouse climate simulation and control, energy efficiency, economic and ecological sustainability) • Mechanical pest control (optimized insect screens, utilization of beneficial insects, entomopathogenic fungi etc.)