A field experiment was conducted in 2003 and 2005 at the Experimental Station Lipnik on acid brown soil. The soil is classified as quality class IVb, good rye complex, and for cultivation of light soils with low water retention useful. Evaluated the use of water for plum grown under different water and fertilizer. The experiment was randomized block design in the system dependent (called a split-plot), in four replications in the experiment. The research was conducted on trees in the fourth year after planting, fall within the third year of fruiting. Maintained grass between the trees, and rows of trees - herbicide fallow. The factor first was watering under-crown: O-control (without irrigation),W-irrigated sites, where soil water potential fell below - 0.01 MPa. Irrigation system was used under-crown in which water was distributed by type of Hadar. Second factor was the mineral fertilization NPK 0 - control (without fertilization), 2 NPK - 260 kg NPK. ha-1 (80 +60 +120).Nitrogen fertilizers applied in early spring, before moving the vegetation, while phosphorus and potassium in the autumn according to the agrotechnical. Based on water intensity ratio of photosynthesis to transpiration and photosynthetic rate were determined using (WUE) and photosynthetic rate of the instantaneous ...
Field experiments were done in 2011-2012 in ES Lipnik near Stargard Szczeciński on the sandy soil (good rye complex) and small retencion of usefulness water. The experiment was designe by randomized block method in 4 replications. Among the trees was the lawn but in the rows the selective herbicide was used. The aim of the studies was to determine the effect of under crown irrigation on the chemical composition of leafs plum cv. ‘Amers' and ‘Cacańska Rana'. The experimental design consisted control fields, without irrigation - O and irrigated fields - W. Supplemental irrigation was used when tensiometer have shown that water potential of soil dropped lower than -0,01 MPa. For irrigation the "Hadar" sprinkler were used (r = 2 m). Depending on rainfall the amount of irrigation from 11,8 to 14,0 m3 there used. Studies have shown similar reaction of both plum varieties to the applied water factor. The leaves taken from trees irrigated had tends to reduce the concentration of nitrogen and phosphorus. A similar reaction of both varieties was also found in the case of the concentration of potassium and calcium. In addition, the objects on which there was an increase of zinc content significantly decreased ...
