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Förändring i markvattenhalt vid odling av sockerbetor och vårstråsäd

Olsson, Lennart and Persson, Patrik (1998). Förändring i markvattenhalt vid odling av sockerbetor och vårstråsäd. Technical Report. Uppsala: (NL, NJ) > Dept. of Soil Sciences > Div. of Soil Management, Sveriges lantbruksuniversitet. Meddelanden från Jordbearbetningsavdelningen ; 25
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Abstract

This work was a part of a larger project, which tries to estimate the risk of soil compaction in the subsoil when using heavy sugar beet harvesters, in relation to soil type and water content in the field at harvest time. The purpose of this study was to follow the changes in soil water con tent during the growing period, in a spring sown crop and in sugar beets. Two sites with different soil types were used during the period of growth 1997. The method used was to take soil samples for gravimetric water content every two weeks in 10 cm layers to 1 m depth. Saturated hydraulic conductivity and water retention was determined on soil cores in each 10 cm layer to l m depth. Meteorological data was collected from nearby weather stations. The calculated evaporation from the crop was compared with the potential. The water content in the subsoil changed more slowly than in the topsoil. The cereal crop absorbed more water than the sugar beets until the middle of the summer, but during late summer and autumn the water content in the soil was lower in the sugar beets than in the cereal crop. At both sites the profile was practically emptied on plant accessible water down to l meter during the summer. At one of the sites the calculated transpiration from 6 July to 8 August was approximately half of the potential, which indicates that the crops suffered from drought. At harvest time of the cereal crop the soil had low water con tent. The water content in the sugar beet field was larger at the time of harvest of the sugar beets. At harvest time of the cereal crop there was little risk of subsoil compaction because of the low soil water content. At the time of sugar beet harvest there was probably a risk of subsoil compaction. A possibility to avoid compaction would be to harvest the sugar beets before an expected large rainfall, although some losses of sugar may occur during the storage of the sugar beets.

Authors/Creators:Olsson, Lennart and Persson, Patrik
Title:Förändring i markvattenhalt vid odling av sockerbetor och vårstråsäd
Series/Journal:Meddelanden från Jordbearbetningsavdelningen (1102-6995)
Year of publishing :1998
Number:25
Number of Pages:20
Place of Publication:Uppsala
Publisher:Institutionen för markvetenskap, Avdelningen för jordbearbetning, Sveriges lantbruksuniversitet
ISSN:1102-6995
Language:Swedish
Publication Type:Report
Refereed:No
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Soil science
Keywords:jordbearbetning, jordpackning, betupptagare, jordart, vattenhalt, växtsäsong, fältförsök, skördetidpunkt
URN:NBN:urn:nbn:se:slu:epsilon-8-741
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-8-741
ID Code:5251
Department:(NL, NJ) > Dept. of Soil Sciences > Div. of Soil Management
Deposited By: Elisabeth Bölenius
Deposited On:20 Sep 2010 00:00
Metadata Last Modified:02 Dec 2014 10:38

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