The aim of the study was to determine the effect of drip irrigation and microsprinkler irrigation on the content of starch, total sugars (including reducing sugars) in tubers of chosen potato cultivars after harvest and after storage during 6 months. Experiments were carried out in 2001–2003 at Kruszyn Krajeński near Bydgoszcz on the soil include to VI – quality class and 7 – complex of agricultural suitability (very weak rye complex). The soil was characterized by the very low silt and clay fraction content in topsoil (7%) and subsoil horizon (3–5%). The value of pH in 1n KCl was slightly acidic, and the abundance of basic macroelements was on the average level. The experiment included three factors: A – irrigation (with-out irrigation – control plots, drip irrigation, micro-sprinkler irrigation), B – cuti-var (‘Barycz’, ‘Mors’, ‘Triada’), C – storage (after harvest – control, after storage during 6 months). Three replications were applied. Drip irrigation was applied using ‘T-Tape’ drip lines (in-line emitters spaced 20 cm apart). The single drip line was located between two neighbouring rows of potatoes. The single emitter’s output amounted on average 0,6 l h-1. Micro-jet irrigation was done with the use of micro-jets ...
The aim of the study was to determine the influence of drip irrigation on the nutritive value of winter squash ‘Rouge vif d'Etampes' fruits analyzed directly after the harvest and after the storage. The plants were grown on the very light soil in the region of decreased rainfall amounts during the vegetation period. The field experiment was conducted in 2007-2008 at Kruszyn Krajeński near Bydgoszcz on the soil of quality class V-VI (very weak and weak-rye-soil-complex). The field water capacity in the soil layer 0-50 cm was 57.5 mm, while the effective useful retention amounted 29.3 mm. The experiment was designed as one-factorial trial in four replications; drip irrigation as the experiment factor was applied. As the control the plots without irrigation were considered. The single plot area was 11.2 m2. The drip irrigation was conducted according to the soil tensiometer indications ( 0.04 MPa). The research material was the eatable parts of fresh fruits that were analyzed directly after the harvest and after the storage for six months at the temperature 10°C and the relative air humidity 75%. The drip irrigation performed during the cultivation of winter squash increased the content of vitamin C, total carotenoids including ß-carotene, as ...
