Integrated production and protection under protected cultivation in the Mediterranean region

Hanafi, A.; Papasolomontos, A.

doi:10.1016/s0734-9750(98)00022-6

Cited by 31 publications

(14 citation statements)

References 17 publications

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“…The mechanism of degradation greatly depends on the nature and stability of the radical formed in the course of the reaction of photo-oxidation [17]. For LLDPE, stable radicals are formed due to tertiary carbons and these radicals propagate to react with other radicals causing reticulations of the chains.…”

Section: Resultsmentioning

confidence: 99%

Radical Group Degradation Study of Linear Low Density Polyethylene for Developing Environmentally Degradable Plastic Bags

2013

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Section: Resultsmentioning

confidence: 99%

Radical Group Degradation Study of Linear Low Density Polyethylene for Developing Environmentally Degradable Plastic Bags

2013

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“…The other alternative with lower cost is the ventilation using fans. But, the existence of thermal and mass exchange between different constituents of the greenhouse, results in a nonlinear behaviors of the process and prevents the control of temperature by classical means (Hanafin and Papasolomontos, 1999). So the thermal control is reduced to an on-off control action maintaining a continuous commutation between two temperatures level.…”

Section: ∑ ∑mentioning

confidence: 99%

Thermal Control of a Greenhouse by Variation in Ventilation Rate using a Fuzzy Parallel Distributed Compensation Controller with an RST Regulator in Each Rule

K.¹

2012

American Journal of Applied Sciences

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Problem statement:The greenhouse has uncontrollable inputs that affect its climate, which arises the difficulty to regulate its inside temperature. The solution can be found using a multi-system approach like the Takagi-Sugeno System from which a design of a Parallel Distributed Compensation (PDC) controller is performed. However, a stability problem arises and was negotiatesd in general based on a Lyapunov criterion. The latter isn't appropriate in our case because of the great number of rules describing the greenhouse. Approach: An alternative solution is proposed using a PDC controller with a local RST regulator in each rule. The synthesis of each one is determined using pole placement avoiding the cross-coupling (that may cause instability) between the local regulators and the sub-models related to differents rules. Results: The proposed fuzzy controller was applied to an experimental greenhouse and was able to lead the inside temperature to the desired value despite the externals perturbations. Conclusion: The presented study offer a simple solution to the stability problem when using PDC controller and so can be mush more implementable than the others stabilization methods presented in the literature. In the agriculture field, it can replace the on-off control action that is widely used in the greenhouses because of the processus complexity.

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“…Vegetable cultivation under greenhouse condition has been proven to be a good farming practice to resolve this problem in various areas of different countries, especially in countries with harsh environments or insufficiency soil resources (Hanafi and Papasolomontos 1999;Ozkan et al 2004). Though intensive agriculture effectively met the people's needs for food initially, it also caused some problems requiring urgent solutions, for example the quality decline of soil and agricultural production (Cassman 1999;Ju et al 2006).…”

Section: Introductionmentioning

confidence: 99%

An endophytic bacterium Acinetobacter calcoaceticus Sasm3-enhanced phytoremediation of nitrate–cadmium compound polluted soil by intercropping Sedum alfredii with oilseed rape

Bao

GuiQing

et al. 2015

Environ Sci Pollut Res

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Intensive agricultural system with high input of fertilizer results in high agricultural output. However, excessive fertilization in intensive agricultural system has great potential to cause nitrate and heavy metal accumulation in soil, which is adverse to human health. The main objective of the present study was to observe the effects of intercropping and inoculation of endophytic bacterium Acinetobacter calcoaceticus Sasm3 on phytoremediation of combined contaminated soil in oilseed rape (Brassica napus L.). The results showed that with Sasm3 inoculation, the biomass of rape was increased by 10-20% for shoot, 64% for root, and 23-29% for seeds while the nitrate accumulation in rape was decreased by 14% in root and by 12% in shoot. The cadmium concentration in rape increased significantly with mono-inoculating treatment, whereas it decreased significantly after intercropping treatment. By denaturing gradient gel electrophoresis (DGGE) and real-time quantitative PCR analysis, the diversity of bacterial community and the number of nirS and nirK gene copies increased significantly with inoculation or/and intercropping treatment. In conclusion, the endophytic bacterium Sasm3-inoculated intercropping system not only improved the efficiency of clearing cadmium from soil without obstructing crop production, but also improved the quality of crop.

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Integrated production and protection under protected cultivation in the Mediterranean region

Cited by 31 publications

References 17 publications

Radical Group Degradation Study of Linear Low Density Polyethylene for Developing Environmentally Degradable Plastic Bags

Radical Group Degradation Study of Linear Low Density Polyethylene for Developing Environmentally Degradable Plastic Bags

Thermal Control of a Greenhouse by Variation in Ventilation Rate using a Fuzzy Parallel Distributed Compensation Controller with an RST Regulator in Each Rule

An endophytic bacterium Acinetobacter calcoaceticus Sasm3-enhanced phytoremediation of nitrate–cadmium compound polluted soil by intercropping Sedum alfredii with oilseed rape

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