The occrrence of vesicular-arbuscular mycorrhiza in barley and wheat grown in some Danish soils with different fertilizer treatments |
| |
Authors: | Anni Jensen Iver Jakobsen |
| |
Institution: | (1) The Danish Agricultural Advisory Centre, 28, Kongsgårdsvej, DK-8260 Viby J., Denmark;(2) Present address: Botanical Institute, University of Aarhus, 68, Nordlandsvej, DK-8240 Risskov, Denmark |
| |
Abstract: | Summary Soil samples, roots and shoots were collected from barley crops at three locations which had received different combinations of N and P for 10 years, and from long-term fertilizer experiments on barley in a sandy soil and on barley and wheat in a loamy soil.Soils were analysed for available P by an anion exchange resin procedure, roots were examined for intensity of VAM infection, and shoots wee analysed for N and P.Vesicualr-arbuscular mycorrhizal infection was found at all locations. It was most abundant at the three locations with least soil-P and lightest at the two locations high in soil-P. Within loocations an inverse relation was found between soil-P level and intensity of infection. Infection was also intensity. by increasing N-fertilizer. Spore counts from selected samples correlated well with infection intensity. Shoot-P did not differ significantly between treatments in spite of significant differences in soil-P. This points to the significance of vesicular-arbuscular mycorrhiza: a lower soil-P level accompanied by a higher infection intensity seem to counterbalance each other to a certain extent. |
| |
Keywords: | Infection intensity Loamy soil N fertilizer P fertilizer Sandy soil VA-mycorrhiza Wheat |
本文献已被 SpringerLink 等数据库收录! |
|