ISHS Acta Horticulturae 627: XXVI International Horticultural Congress: Toward Ecologically Sound Fertilization Strategies for Field Vegetable Production
MANAGEMENT STRATEGIES FOR CAPTURING THE BENEFITS OF MYCORRHIZAS IN THE PRODUCTION OF FIELD-GROWN VEGETABLES |
| Authors: | J.N. Sorensen, J. Larsen, I. Jakobsen |
| Keywords: | Allium porrum, cover crop, inoculation, leek, phosphorus, previous crop, zinc |
| Abstract:
An improved use of the mycorrhizal symbiosis between plants and fungi may increase the sustainability in plant production. Two approaches were investigated: 1) The use of previous mycorrhizal main crops or pre-established mycorrhizal cover crops, which enhance the rate of mycorrhiza formation in young seedlings and 2) the use of transplants, which were pre-colonized by mycorrhizal fungi selected for high nutrient uptake efficiency. Results from field experiments showed that colonization, P uptake and growth of leeks increased if the previous crop was leek compared to cabbage. A cover crop of black medick, established the previous autumn, increased the colonization of leek roots and also increased the plant P concentration and growth. These measurements were not influenced by the date of incorporation. Leek transplants inoculated with Glomus intraradices or a field population of mycorrhiza increased the colonization, P and Zn uptake and growth of leeks, compared to non-inoculated transplants. Regarding the concentration of P and Zn, especially the leek roots were influenced by inoculation, compared to the shoots. Differences in colonization, nutrient uptake and plant growth diminished during the growing period and nearly disappeared at the final harvest date of the leeks. This lack of response could be due to sufficient P supply. | |
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