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VCRB :: Contents of Volume 59/2003 :: Detailed information


THE EFFECTS OF THE TERM OF WEED REMOVAL AND SOIL MULCHING 
ON YIELD AND CHEMICAL COMPOSITION OF ZUCCHINI FRUITS


Eugeniusz KOŁOTA, Agnieszka SŁOCIAK
Agricultural University of Wrocław Rozbrat 7, 50-334 Wrocław, Poland


Summary

In a field study conducted in 2000-2002 weed removal  was carried out 1-3 times starting 3, 6 or 9 weeks after seed sowing of zucchini. In the other treatments soil mulching with black fleece or black and white plastic was compared with weed-free control without mulch. Results of the study showed that the most detrimental effect on marketable and early yield of fruits had weeds present during the period of 6 and 9 weeks after seed drilling. Very efficient method of weed control and yield increment was soil mulching with fleece or plastic. Black fleece appeared to be the most favourable for marketable yield, while black foil for early yield of fruits.
The delay of weed removal up to 6 and 9 weeks from sowing date resulted in the decrease of dry matter, total and reducing sugars, while the increment of nitrates contents. Soil mulching did not affect the fruit composition, except that of white plastic, which caused the drop of dry matter, vitamin C, sugar and total N amounts.


keywords:weed infestation, mulching materials, marketable and early yield, fruit composition

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