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EFFECT OF DRAINPIPE SPACING UPON DRAINAGE DISCHARGE AND OILSEED RAPE AND SOYBEAN YIELDS
Ivan Šimunić
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Damir Cvetković
; Zagrebački holding d.o.o.-Podružnica Zrinjevac, Zagreb, Hrvatska
Milan Pospišil
orcid.org/0000-0002-9972-3940
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Stjepan Husnjak
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Sažetak
The research goal was to determine the total drainage discharge, its duration and oilseed and soybean yields on hydroameliorated soil, with different drainpipe spacing (15 m, 20 m, 25 m and 30 m). Investigations were conducted in two climatically different growing seasons (years). Oilseed rape was grown in the particularly wet growing season (1002.9 mm precipitation) of 2009/10, while soybean was grown in the extremely dry growing season (348.4 mm precipitation) of 2011. In the wet growing season, different drainpipe spacing had different effects on excess water drainage and oilseed rape yields. In the drainage variant with 15-m drainpipe spacing, the highest drainage discharge (324 mm), its shortest duration (118 days) and the highest rapeseed yield (3.3 t/ha) were determined whereas in the 30-m drainpipe spacing variant, the lowest drainage discharge (297 mm), its longest duration (140 days) and the lowest yield (2.38 t/ha) were recorded. In the dry growing season, drainpipe spacing had no effect on soybean yields. Approximately equal yields were obtained in all variants, from 2.29 t/ha in the drainage variant with 30-m drainpipe spacing to 2.40 t/ha in the variant with 20-m drainpipe spacing. Drainage discharge was not determined in either variant.
Ključne riječi
drainpipe spacing; drainage discharge; oilseed rape and soybean yields
Hrčak ID:
79938
URI
Datum izdavanja:
12.4.2012.
Posjeta: 1.522 *