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• Physiological examination of some industrial wastes under laboratory conditions

  241-246

  Brigitta Tóth

  Views:

  228

  I would like to draw the attention to the different side-products and wastes that contain lots of organic matter, micro and macro elements, and the fact that they do not have any harmful effect. These materials can be used as micronutrient fertilizers, therefore quantity of the produced CO₂ and other greenhouse gases will decrease. Compost, sewage sludge and lime sludge were used in our experiments. The usability of these materials in crop production was examined in crop production within laboratory conditions.

• Hydro-cultural growing of cut flower in greenhouse

  139-146

  Péter Lévai

  Zsuzsa Turiné Farkas

  Views:

  104

  The closed system hydro-cultural growing is environmentfriendly,  the chemical fertilizer used for nourishing material supply does not contaminate the soil water and it is possible to eliminate the chemical materials accumulating during the disinfection of the soil getting into the environment. It can be mechanized and regulated well so the optimum growing conditions can be fixed for the plant and as a consequence higher yield can be reached both for the carnation and for Zantedeschia and for Rosa. Growing method with saving both the nourishing material and the water. Taking all the above into consideration timing is easier and better, it can be programmed better than the traditional chemo-cultural growing.

• Influences of different organic fertilizers on nutrients of humic sandy soil and on the growth of Spinach (Spinacia oleracea L.)

  23-28

  Andrea Balláné Kovács

  Rita Kremper

  Ida Kincses

  Ágnes Leviczky

  Views:

  324

  A greenhouse pot experiment was conducted to compare the effects of manure with different origin (horse, cattle), various bedding materials (straw, sawdust) and diverse doses (30 t ha^-1, 60 t ha^-1) and the impact of food waste compost on the plant growth and the available plant nutrient content of soil. The study was conducted on humic sandy soil and consisted of 9 treatments in a randomized complete block design with four replications. Spinach (Spinacia oleracea L.) was grown as the test crop. The treatments were: 1. unfertilized control; 2. horse manure with straw (30 t ha^-1); 3. horse manure with sawdust (30 t ha^-1); 4. cattle manure (30 t ha^-1); 5 food waste compost (30 t ha^-1); 6. horse manure with straw (60 t ha^-1); 7. horse manure with sawdust (60 t ha^-1); 8. cattle manure (60 t ha^-1); 9. food waste compost (60 t ha^-1). Plant growth was monitored for 4 weeks. Shoot and root weights per pot were measured, total biomass weight per pot were counted.

  On the basis of the results it can be concluded, that among treatments the application of horse manure with straw enhanced spinach growth most significantly compared to other treatments and to the non-treated control, resulted the highest weights of leaves and roots of spinach. At the same time even small dose (30 t ha^-1) of this fertilizer caused increased plant available nitrogen and phosphorus of soil and the higher dosage further increased these values. The horse manure with sawdust applied in lower dose did not alter the leaves and roots weights, but higher portion (60 t ha^-1) caused significantly decreased plant biomass. The results proved that the bedding material may significantly alter the composition of manure and may change the plant nutrition effect of organic fertilizer. Cattle manure and food waste compost in both applied doses enhanced plant growth. Both fertilizers increased the plant available nitrogen forms and phosphorus content of soil, but cattle manure caused higher increase.