In the years of 2003–2005 two-factors field experiment was set up in ES Lipnik near Stargard Szczeciński on the sandy soil (good rye complex) and a small retencion of usefulness water. The aim of the study was to determine the ef-fect of irrigation and mineral fertilization on the photosynthetic activity the leaves of some species of stone fruit trees. All experiments were done on the trees 4 years after planting. The experiments were designer by split-plot method in 7 replications with cherry, 5 replications with peach, and 4 replications with plum. Among the trees was the lawn but in the rows the selective herbicide fallow was kept. Two factors were considered: irrigation (O – control, W –under – crown ir-rigation) and mineral fertilization for cherry and plum 0 NPK – control (without fertilization), 1 NPK – 130 kg NPK•ha-1, 2 NPK – 260 kg NPK•ha-1; and for peach 0 NPK – control (without fertilization), 1 NPK – 150 kg NPK•ha-1, 2 NPK – 300 kg NPK•ha-1. Measurements of cherry, peach and plum leaves photosynthesis were done on well developer leaves on one year old branches. On basic of obtained results was found that photosynthetic activity of cherry peach and ...
A field experiment was conducted in 2003 and 2005 at the Experimental Station Lipnik near Stargard, on acid brown soil. The soil is classified as quality class IVb, good rye complex, and for cultivation of light soils with low water re-tention useful. We evaluated the use of water for cherry grown under different water and fertilizer. The experiment was randomized block design in the system dependent (called a split-plot), in seven 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 I 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 sprinkler scale spraying for cherry-1m. 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 ...
The response of two strawberry cultivars (‘Elsanta', ‘Sonata') to drought was examined by evaluating the yield and selected morphological and physiological parameters. Plants were subjected to two different water regimes: optimal irrigation (control), and reduced irrigation (water potential in the growing medium was maintained at a level -30 kPa, stress treatment). Genotypes differed in their response to water deficiency. Cultivar ‘Sonata' presented high rates of net photosynthesis with high value of water use efficiency (a ratio of photosynthetic rate to transpiration rate) under water shortage conditions. Drought stress reduced leaf area in all cultivars, but root development was retarded only in ‘Elsanta'. Under water deficiency conditions reduction of yield was higher for ‘Elsanta'. ‘Sonata' appeared to be more drought resistant which was reflected by both growth and yield parameters.
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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 ...
The response of three strawberry cultivars (‘Elsanta', ‘Elkat', ‘Grandaro-sa') to drought was examined by evaluating the yield and selected morphological and physiological parameters. Plants were subjected to two different water regimes: optimal irrigation (control), and reduced irrigation (water potential in the growing medium was maintained at a level -30 kPa, stress treatment). Genotypes differed in their response to water deficiency. Under water shortage conditions, the rate of CO2 assimilation and efficiency of photosynthetic apparatus (expressed by chlorophyll fluorescence parameters) were the highest in ‘Elsanta'. On the other hand, the severe inhibition of photosynthesis was observed in ‘Elkat', which corresponded to the reduced biomass production. Taking all data into consideration it was concluded that cultivar ‘Elsanta' appeared to be more drought resistant which was reflected by enhanced physiological and yield parameters. ...
The response of three raspberry cultivars (‘Beskid', ‘Laszka', ‘Latham') to water deficiency was examined by evaluating selected physiological parameters. Plants were subjected to two different water regimes: optimal irrigation (control), and reduced irrigation. Leaf water potential in all cultivars was decreased as a result of limited water availability. Genotypes differed in their response to water deficiency. Under water shortage conditions, the rate of CO2 assimilation was the highest in ‘Latham' and ‘Laszka'. On the other hand, the severe inhibition of photosynthesis was observed in ‘Beskid'. Taking all data into consideration it was concluded that cultivar ‘Latham' and ‘Laszka' appeared to be more drought resistant which was reflected by enhanced physiological parameters. ...
