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Kan växtskyddsåtgärder minska kväveförlusterna vid odling av höstvete?

Lindén, Börje and Lerenius, Cecilia and Nyberg, Anna and Delin, Sofia and Ferm, Martin and Torstensson, Gunnar and Hedene, Karl-Arne and Gruvaeus, Ingemar and Tunared, Rolf and Roland, Johan (2006). Kan växtskyddsåtgärder minska kväveförlusterna vid odling av höstvete? Skara: (NL, NJ) > Dept. of Soil Sciences > Div. of Precision Agriculture
(NL, NJ) > Dept. of Soil Sciences > Div. of Water Quality Management, Sveriges lantbruksuniversitet. Rapport (Avdelningen för precisionsodling, Sveriges lantbruksuniversitet) ; 5
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Abstract

During a three-year period (2002-2004), studies were carried out on nitrogen dynamics and losses during cultivation of winter wheat as influenced by disease and insect attacks. Three treatments with different degrees of plant protection (fungicides and pesticides??) were tested in a field trial on a silty clay soil in south-western Sweden. The wheat crop was continually inspected for pests and diseases. Direct measurements of nitrogen leaching were performed in tile-drained field plots equipped with individual collectors for drainage water. Ammonia emissions from the wheat stands were measured in one replicate plot during the first two growing seasons. Nitrogen accumulation and distribution in plants were investigated by sampling the crop at different stages of development and analysing different plant parts for total nitrogen content. Soil mineral nitrogen was determined within the 0-90 cm soil layer in early spring, at yellow ripeness and in November. Grain yield and grain nitrogen efficiency were always significantly larger and mean residual soil mineral nitrogen levels (at maturity and in November) significantly lower in the treatments with crop protection. At maturity, total N concentration in the straw was significantly higher in the treatment without plant protection. Mean nitrogen leaching was greater in the treatment without crop protection but the differences were not statistically significant. Ammonia emissions tended to be somewhat smaller in fungicide-treated wheat stands, but were very small in all treatments. The better N use efficiency with crop protection was probably due to a combination of larger N amounts in above-ground plant parts and better N translocation to grain when diseases were reduced.

Authors/Creators:Lindén, Börje and Lerenius, Cecilia and Nyberg, Anna and Delin, Sofia and Ferm, Martin and Torstensson, Gunnar and Hedene, Karl-Arne and Gruvaeus, Ingemar and Tunared, Rolf and Roland, Johan
Title:Kan växtskyddsåtgärder minska kväveförlusterna vid odling av höstvete?
Series/Journal:Rapport (Avdelningen för precisionsodling, Sveriges lantbruksuniversitet) (1652-2788)
Year of publishing :2006
Number:5
Number of Pages:29
Place of Publication:Skara
Publisher:Avdelningen för precisionsodling, Institutionen för markvetenskap, Sveriges lantbruksuniversitet
ISBN for printed version:91-576-7173-7
ISSN:1652-2788
Language:Swedish
Publication Type:Report
Refereed:No
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production
Keywords:kväve, växtskydd
URN:NBN:urn:nbn:se:slu:epsilon-1-36
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-1-36
ID Code:3279
Department:(NL, NJ) > Dept. of Soil Sciences > Div. of Precision Agriculture
(NL, NJ) > Dept. of Soil Sciences > Div. of Water Quality Management
Deposited By: Anna Nyberg
Deposited On:16 Jun 2008 00:00
Metadata Last Modified:02 Dec 2014 10:20

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