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 ...
Celem podjętych badań było poznanie wpływu nawadniania kroplowego i deszczownianego na wysokość i jakość plonu wybranych odmian ziemniaka średnio wczesnego. Doświadczenia polowe przeprowadzono w latach 2001-2003 we wsi Kosobudy, gm. Brusy, woj. pomorskie, na glebie zaliczanej do IVb klasy bonitacyjnej (kompleks 5 żytni dobry). Ilość wody łatwo dostępnej dla roślin (efektywna retencja użyteczna) w warstwie gleby o kontrolowanym uwilgotnieniu (od 0 do 40 cm) wynosiła 29,5 mm.Dwuczynnikowe doświadczenie założono metodą losowanych podbloków układzie zależnym split-plot, w czterech replikacjach. Czynnikiem pierwszego rzędu było nawadnianie, zastosowane w trzech wariantach: O - bez nawadniania (obiekt kontrolny), K - nawadnianie kroplowe, D - nawadnianie deszczowniane. Czynnik drugiego rzędu stanowiły trzy średnio wczesne odmiany ziemniaka: Barycz, Mors, Triada. Ziemniaki uprawiano na pełnej dawce obornika bydlęcego (35 t∙ha-1) wnoszonego do gleby jesienią pod orkę zimową. Nawożenie fosforem i potasem wynosiło 80 kg P2O5∙ ha-1 i 140 kg K2O∙ ha-1. Nawożenie azotem zasto-sowano w dawce 90 kg N∙ ha-1. Terminy wykonywania nawodnień ustalano na podstawie potencjału wodnego gleby określanego przy użyciu tensjometrów. Nawadnianie rozpoczynano w momencie, kiedy siła ssąca gleby wynosiła -0,03 MPa.Zastosowanie nawodnień w uprawie ziemniaka istotnie zwiększyło plon handlowy bulw. Nie stwierdzono istotnych różnic w wysokości plonów ziemniaka ...
The study of drip fertigation of winter squash ‘Gomez' was conducted on the very light soil on the experimental field in Kruszyn Krajeński near Bydgoszcz in the years 2007 and 2008. The research was established as one-factorial, using the method of drawn blocks, in four replications. Drip fertigation (DF) as the liquid fertilization supplied nitrogen, potassium and phosphorus to the plants three times during growing season. As the control (DP), the drip irrigation combined with broadcast application was used. The potassium and phosphorus fertilization of control plots was applied before seed sawing. The nitrogen fertilization of control plots was provided in three single doses during vegetation. The liquid and powder fertilizations were performed at the same time. The complex fertilizer 'Universol Blue' (N:P:K = 18:11:18) was used. The dose of fertilizer was 3:2:3 (187.5:125:187.5 kg of NPK per ha). The irrigation was conducted using the drip line 'T-Tape'. The liquid fertilizer was mixed by the 'Dosatron' dispenser. The irrigation started when the soil water pressure, measured with the tensiometers, was near -0.04 MPa. In comparison to the control (powder fertilization), the drip fertigation (liquid fertilization) significantly increased marketable fruit yield, single fruit weight and fruit number. Most of the tested ...
The aim of the study was to determine the effect of drip irrigation on yielding of summer squash ‘White Bush' grown under conditions of two localities: Lipnik near Stargard Szczeciński (soil of quality class IVb, and of good-rye-soil-complex) and Kruszyn Krajeński near Bydgoszcz (soil of quality class V, and of weak-rye-soil-complex). The study was designed as one-factorial trial: drip irrigation as the experimental factor was considered. Drip irrigation was conducted according to soil tensiometer indications (-0.04 MPa). Both, in Lipnik as well as in Kruszyn Krajeński, drip irrigation significantly increased marketable yield of summer squash ‘White Bush'. A higher rise in yields due to irrigation was obtained in Kruszyn Krajeński than in Lipnik. Mean marketable yield of summer squash fruits in Lipnik was higher than that obtained in Kruszyn Krajeński. Drip irrigation significantly increased the single fruit weight in relation to the control, in both crop localities. The system of drip irrigation significantly affected the number of fruits per plant. Summer squash plants grown in Lipnik produced higher number of fruits, than in Kruszyn Krajeński. In addition, essential influence of drip irrigation was affirmed on chemical composition of fruits, i.e. dry matter, vitamin C, monosaccharides, saccharose, content of total sugars ...
