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Characterisation of Two Direct Covers Made of PP and HDPE in the Organic Production of Zucchini

Bucki Piotr, Siwek Piotr, Mora Ojeda Alfonso Luis

Fibres & Textiles in Eastern Europe

2021

Vol. 29, no. 3 (147)

60--66

The aim of the research conducted in 2016-2018 at the University of Agriculture in Krakow was to assess the effect of the direct covering of 'Partenon' F1 zucchini plants with polypropylene nonwoven fabric (PP 20 g/m-2) and polyethylene netting (HDPE 38 g/m-2). While the covers were in place, measurements of environmental factors were taken. The air temperature and humidity during that period were on average by 2.1 °C and 13% and by 1.4 °C and 7.9% higher on the plots covered with the nonwoven and the net, respectively, compared to the control. Uncovered plants formed the smallest number of leaves and produced the lowest marketable yield. Weed infestation was greater on the plots with the covers by 43% and 56% for the HDPE net and the PP nonwoven, respectively, compared to the control. Laboratory analyses of the zucchini fruit did not show any significant differences in its chemical composition.

Celem badań przeprowadzonych w latach 2016-2018 na Uniwersytecie Rolniczym w Krakowie była ocena wpływu bezpośredniego osłaniania cukinii odmiany 'Partenon' F1 włókniną polipropylenową (PP 20 g/m-2) oraz siatką polietylenową (HDPE 38 g/m-2). W czasie osłaniania wykonywano pomiary czynników środowiska. Temperatura i wilgotność powietrza w okresie osłaniania roślin były średnio o 2.1 °C i 13% oraz 1.4 °C i 7.9% odpowiednio wyższe w obiekcie z włókniną i siatką w porównaniu do kontroli. Rośliny nieosłaniane charakteryzowały się najmniejszą liczbą liści i wydały najniższy plon handlowy. W obu obiektach osłanianych odnotowano większe zachwaszczenie o 43% i 56% odpowiednio dla siatki z HDPE i włókniny PP w stosunku do kontroli. Wykonano analizy laboratoryjne owoców, które nie wykazały istotnych różnic.

Influence of drip irrigation on the yielding of summer squash „White Bush” under rainfall-thermal conditions of Bydgoszcz and Stargard

Rolbiecki R., Rolbiecki S., Podsiadło C., Wichrowska D., Figas A., Jagosz B., Ptach W.

Infrastruktura i Ekologia Terenów Wiejskich

2017

nr III/2

1229--1240

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 and sum of carotenoids and ß-carotin.