Details
| Translated title of the contribution | Yield effects of residual weeds in vegetable crops after nonchemical weed regulation |
|---|---|
| Original language | German |
| Pages (from-to) | 29-38 |
| Number of pages | 10 |
| Journal | Pflanzenbauwissenschaften |
| Volume | 7 |
| Issue number | 1 |
| Publication status | Published - Jun 2003 |
Abstract
In order to avoid losses of yield and product quality vegetable crops have to be largely kept free from weeds. With mechanical control measures this goal can be reached between rows to a great extent, but success within the crop rows is limited. The remaining weeds can cause large yield losses in crops with low competitiveness. In the investigations reported here the effects of weed infestation remaining after thermal and mechanical control measures on yield of carrots (Daucus carota L.), onion (Allium cepa L.) and cauliflower (Brassica oleracea var. botrytis L.) were quantified in commercial farms as well as on the research station. On commercial farms yield losses could not be avoided by thermal and mechanical measures alone. Averaged over farms, yield losses due to residual weeds in carrots and onions were ca. 50% and ca. 80%, respectively, when no hand weeding was conducted in addition to the mechanical and thermal control. Hand weeding as usually practised on the farms reduced these losses in carrots and onions to 16% and 18%, respectively. On the research station where a wider range of mechanical control strategies could be pursued, residual weeds reduced yields of carrots and onions by 30% and 50%, respectively, while cauliflower yields were not affected. Yield losses were in all cases due to a reduction of the proportion of large onion bulbs and carrot roots. For carrots a hyperbolic relationship between weed dry mass at harvest and yield loss could be found.
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
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In: Pflanzenbauwissenschaften, Vol. 7, No. 1, 06.2003, p. 29-38.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ertragswirksamkeit der restverunkrautung in gemüsekulturen nach nichtchemischen unkrautregulationsmaßnahmen
AU - Laber, Hermann
AU - Stützel, Hartmut
PY - 2003/6
Y1 - 2003/6
N2 - In order to avoid losses of yield and product quality vegetable crops have to be largely kept free from weeds. With mechanical control measures this goal can be reached between rows to a great extent, but success within the crop rows is limited. The remaining weeds can cause large yield losses in crops with low competitiveness. In the investigations reported here the effects of weed infestation remaining after thermal and mechanical control measures on yield of carrots (Daucus carota L.), onion (Allium cepa L.) and cauliflower (Brassica oleracea var. botrytis L.) were quantified in commercial farms as well as on the research station. On commercial farms yield losses could not be avoided by thermal and mechanical measures alone. Averaged over farms, yield losses due to residual weeds in carrots and onions were ca. 50% and ca. 80%, respectively, when no hand weeding was conducted in addition to the mechanical and thermal control. Hand weeding as usually practised on the farms reduced these losses in carrots and onions to 16% and 18%, respectively. On the research station where a wider range of mechanical control strategies could be pursued, residual weeds reduced yields of carrots and onions by 30% and 50%, respectively, while cauliflower yields were not affected. Yield losses were in all cases due to a reduction of the proportion of large onion bulbs and carrot roots. For carrots a hyperbolic relationship between weed dry mass at harvest and yield loss could be found.
AB - In order to avoid losses of yield and product quality vegetable crops have to be largely kept free from weeds. With mechanical control measures this goal can be reached between rows to a great extent, but success within the crop rows is limited. The remaining weeds can cause large yield losses in crops with low competitiveness. In the investigations reported here the effects of weed infestation remaining after thermal and mechanical control measures on yield of carrots (Daucus carota L.), onion (Allium cepa L.) and cauliflower (Brassica oleracea var. botrytis L.) were quantified in commercial farms as well as on the research station. On commercial farms yield losses could not be avoided by thermal and mechanical measures alone. Averaged over farms, yield losses due to residual weeds in carrots and onions were ca. 50% and ca. 80%, respectively, when no hand weeding was conducted in addition to the mechanical and thermal control. Hand weeding as usually practised on the farms reduced these losses in carrots and onions to 16% and 18%, respectively. On the research station where a wider range of mechanical control strategies could be pursued, residual weeds reduced yields of carrots and onions by 30% and 50%, respectively, while cauliflower yields were not affected. Yield losses were in all cases due to a reduction of the proportion of large onion bulbs and carrot roots. For carrots a hyperbolic relationship between weed dry mass at harvest and yield loss could be found.
KW - Allium
KW - Brassica
KW - Daucus
KW - Harrow
KW - Hoe
UR - http://www.scopus.com/inward/record.url?scp=0037600466&partnerID=8YFLogxK
M3 - Artikel
AN - SCOPUS:0037600466
VL - 7
SP - 29
EP - 38
JO - Pflanzenbauwissenschaften
JF - Pflanzenbauwissenschaften
SN - 1431-8857
IS - 1
ER -