The application of composites consisting of starch, rapeseed cake, crude glycerol, and urea for the fabrication of disposable biodegradable nursery pots is estimated. Mechanical properties of composite films, their hygroscopicity, solubility in water, and water vapour transmission rate were studied. The evaporation of water rate from the plant pots prepared from the composites was found to be twice lower than that observed for the commercial peat plant pots. The fluctuations of the soil temperature were also lower than in the commercial peat pots. The average time of the biodegradation of the composites was about one month. The rate of biodegradation depended on the species of microorganisms and on their physiological properties.
Bourtoom, T. 2008. Plasticizer effect on the properties of biodegradable blend film from rice starch–chitosan. Songklanakarin Journal of Science and Technology, 30 (Suppl. l), 149–155.
Evans, M. R. and Karcher, D. 2004. Properties of plastic, peat, and processed poultry feather fiber growing containers. HortScience, 39, 1008–1011.
Evans, M. R., Taylor, M., and Kuehny, J. 2010. Physical properties of biocontainers for greenhouse crops production. HortTechnology, 20, 549–555.
Gáspár, M., Benkõ, Zs., Dogossy, G., Réczey, K., and Czigány, T. 2005. Reducing water absorption in compostable starch-based plastics. Polymer Degradation and Stability, 90, 563–569.
Kumar, A. P. and Singh, R. P. 2008. Biocomposites of cellulose reinforced starch: improvement of properties by photo-induced crosslinking. Bioresource Technology, 99, 8803–8809.
Maljanen, M., Sigurdsson, B. D., Guðmundsson, J., Óskarsson, H., Huttunen, J. T., and Martikainen, P. J. 2010. Greenhouse gas balances of managed peatlands in the Nordic countries – present knowledge and gaps. Biogeosciences, 7, 2711–2738.
Muscat, D., Adhikari, B., Adhikari, R., and Chaudhary, D. S. 2012. Comparative study of film forming behaviour of low and high amylose starches using glycerol and xylitol as plasticizers. Journal of Food Engineering, 109, 189–201.
Nechita, P., Dobrin, E., Ciolacu, F., and Bobu, E. 2010. The biodegradability and mechanical strength of nutritive pots for vegetable planting based on lignocellulose composite materials. BioResources, 5, 1102–1113.
Orliac, O., Rouilly, A., Silvestre, F., and Rigal, L. 2003. Effects of various plasticizers on the mechanical properties, water resistance and aging of thermo-moulded films made from sunflower proteins. Industrial Crops and Products, 18, 91–100.
Pushpadass, H. A., Marx, D. B., and Hanna, M. A. 2008. Effects of extrusion temperature and plasticizers on the physical and functional properties of starch films. Starch/Stärke, 60, 527–538.
Stein, T. M. and Griene, R. V. 1997. Amino acids as plasticizers for starch-based plastics. Starch/Stärke, 49, 245–249.
Tudorachi, N., Cascaval, C. N., Rusu, M., and Pruteanu, M. 2000. Testing of polyvinyl alcohol and starch mixtures as biodegradable polymeric materials. Polymer Testing, 19, 785–799.
Verhoeven, J. T. A. and Setter, T. L. 2010. Agricultural use of wetlands: opportunities and limitations. Annals of Botany, 105, 155–163.