Search for dissertations about: "oilseed rape"

Showing result 1 - 5 of 15 swedish dissertations containing the words oilseed rape.

  1. 1. Ecology of parasitoids and their hosts in oilseed rape fields

    University dissertation from Media-Tryck, Lund University, Sweden

    Author : Josef Berger; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; parasitoids; herbivores; oilseed rape; pollen beetle; cabbage stem weevil; parasitoid community; niche separation; landscape scale; community composition; landscape configuration; Species abundance distribution SAD models; dispersal; metacommunity;

    Abstract : Oilseed rape fields are a very common crop in the agricultural landscape of southern Sweden, and they can harbour surprisingly many insect species. Some of them are herbivores that feed on various parts of the oilseed rape plant, others are natural enemies of the herbivores, and even more species are tourists from the surrounding landscape. READ MORE

  2. 2. Insect pollination of oilseed rape

    University dissertation from Media-Tryck, Lund University, Sweden

    Author : Sandra Lindström; Sveriges lantbruksuniversitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Ecological intensification of agriculture is suggested as a way to reach higher crop yields without increasing inputs that may degrade the environment. Increased insect pollination in crops, such as oilseed rape, Brassica napus, has been suggested to increase yields, but is rarely integrated in crop management. READ MORE

  3. 3. Characterization and Use of a Multiplex PCR-based System: Random amplified Polymorphic DNA

    University dissertation from Department of Genetics, Lund University

    Author : Christer Halldén; Lunds universitet.; Lund University.; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; DNA mixtures; competition; graphical genotypes; bulked segregant analysis; linkage map; genetic distance; RFLP markers; RAPD markers; oilseed rape; sugar beet; Genetics; cytogenetics; Genetik; cytogenetik;

    Abstract : Random amplified polymorhic DNA (RAPD) is a PCR-based marker system that makes use of universal sets of short oligonucleotides that amplify random DNA fragments under low-stringency conditions. The RAPD marker system has found widespread use and possesses a number of very positive features, being a multiplex and universal system. READ MORE

  4. 4. Pollinators and Insect Pollination in Changing Agricultural Landscapes

    University dissertation from Lund University, Faculty of Science, Centre for Environmental and Climate Research

    Author : Lina Herbertsson; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2017-10]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; pollinators; pollination; agri-environment schemes; beekeeping; oilseed rape; sown flower strips; agri-environment measures;

    Abstract : Svensk sammanfattningKraftiga förluster av pollinerare är oroande och det har talats om risken för att en pollineringskris ska uppstå, med konsekvenser för både människor och miljö. De flesta blommande växter och tre av fyra odlade grödor är nämligen insektspollinerade (Box 1). READ MORE

  5. 5. Nitrogen dynamics in crop sequences with winter oilseed rape and winter wheat

    University dissertation from Lund University, Faculty of Science, Centre for Environmental and Climate Research

    Author : Lena Engström; Sveriges lantbruksuniversitet.; [2010]
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : With the aim of improving fertiliser nitrogen (N) strategies and reducing N leaching, seasonal changes in soil N supply in crop sequences with winter wheat after winter oilseed rape were examined through field experiments. Break crop effects on wheat after oilseed rape, compared with after peas and oats, were determined as regards residual N, yield and optimum N rate (Opt-N). READ MORE