In the years 2005–2007, experiments on the influence of drip irrigation and nitrogen fertigation on the yield of the carrot, parsley and chicory grown on ridges and on flat ground was carried out. Irrigation water and nitrogen solution was supplied via drip lines, which in subsurface irrigation were placed at a depth of 50 mm below the surface of the ridges, along the centreline between two rows of plants. In the case of surface irrigation, the drip lines were placed on the surface of the ridges between two rows of plants. Irrigation started when soil water po-tential was between -30 and -40 kPa. Nitrogen fertilizers (100 kg.ha-1) were ap-plied in two doses. The first dose was applied pre-plant, while the second one was delivered by fertigation. In the control treatment without irrigation, the second dose of nitrogen was applied by broadcasting. Both surface and subsurface ferti-gation used in the cultivation on ridges and on flat ground had a significant ef-fect on the marketable yield of carrot, parsley and chicory roots. In case of car-rot and chicory cultivated on ridges higher yield was obtained with surface drip irrigation and fertigation, however in case of parsley no significant differences in the ...
In the years 2009 -2010 experiments on the influence of irrigation and mulching on yield of celeriac were carried out on certified organic field of the Re-search Institute of Vegetable Crops, Skierniewice. In the experiments three objects of irrigation: drip, mini-sprinkler and without irrigation and tree objects of mulching: mulching with textile biodegradable fleece, red clover mulching and without mulching were compared. In 2010 additionally textile biodegradable fleece enriched in dry red clover was used. Irrigation was applied on the base of soil moisture measurements by irrometers and it was started when water potential reached -20 kPa. Irrigation had a significant effect on the yield of celeriac. In the first year of experiment yield of irrigated celeriac was about 45% higher that non irrigated one. However no differences were found between two different systems of irrigation. In the second year drip irrigation increased yield of celeriac by 16,1% and mini-sprinkler irrigation by 12,1% in comparison to non irrigated object. Similar yield of celeriac was obtained in treatments with textile biodegradable fleece mulching and control without mulching in the first year of experiment. However red clover mulching increased yield of celeriac by 29% as compared to both fleece mulching and control ...
Basic greenhouse vegetables in Poland are grown in open soilless system in which an excess of nutrient solution leaking from area of root system is discharged into the ground or drains of greenhouses. Drainage water from the growing slabs is more concentrated than nutrient solution supplied for plants. The aim of research conducted in the years 2010 - 2012 was to determine the effect of drainage water from soilless cultivation of tomato and cucumber on the mineral content in shallow groundwater occurring in objects of cultivation and in their neighborhood. Water samples for chemical analyzes were collected at intervals of three weeks from the piezometers located in greenhouses and adjacent areas within 25 and 300 m from the object. . The results of chemical analyzes of water indicate an increase in the degree of pollution of the waters of mineral nutrients. Ground water directly under soilless cultivated plants were contaminated almost all mineral nutrients that are in media fertilizers. Groundwater in significant quantities from entering nitrogen, potassium, calcium and magnesium. Contamination of ground water in the cucumber crop was at a similar level as in tomato cultivation. Mineral content in the groundwater decreased with increasing distance from the objects ...
Hand watering or sprinkler irrigation is mostly used in transplant produc-tion of tomatoes grown in pots with organic substrates. The flood irrigation on the tables or on the flood floors is applied in the ornamental plant production and more recently and more often in transplants production of the tomato and the cucumber cultivated in cubes of rockwool. The aim of the investigations conducted in 2008-2010 was to determine the influence of the flood fertigation with different concentration of the nutrient solution (the EC = 1,5, EC = 2,5, EC = 3,5, EC = 4,5 mS.cm -1) on the growth and development of the greenhouse tomato transplants cultivated in peat substrate. The transplants were cultivated on heated flood floor. The pots with tomato plants during fertigation were flooded to height of 3-4 cm by period 30 minutes. The kind of fertigation had no significant influence on the growth and development of tomato transplants. The plans obtained from flood fertigation and from hand watering characterized the similar height, thickness of stem, fresh and dry matter and also surface and number of leaves. Tomato transplants fertigated with nutrient solution of EC 2,5 and 3,5 mS cm-1. had best parameters such as the height, ...
