Application of a flowing solution culture technique to study the parasitic fitness of the nematode Radopholus similis on banana plantlets under two different nitrogen nutrient regimes
A flowing solution culture technique was used to study the effects of N nutrition on banane root infestation by the burrowing nematode #Radopholus similis#. Paired groups of banana plants were grown in separate compartments containing coarse sand (2-5 mm diameter). Input nutrient solutions had fixed compositions and identical total N concentrations. The two compartments differed in their NH4+/total N concentrations, one receiving 0% NH4+/total N (100% NO3-/total N) and the other 60% NH4+/total N (40% NO3-/total N). The compartments were connected by a inverted T-shaped tube containing fine sand (200-250 um diameter) through which nematodes were inoculated. The pH and N concentrations of the output solution were determined at regular intervals. The pH of the output solution differed markedly between the two compartments, with values of 6 8 and 3 6 in the 0% and 60% NH4+ compartments, respectively. In the compartment receiving 0% NH4+, the number of nematodes in the roots and the growth of banane plants was significantly higher than in the compartment receiving 60% NH4+. Even though they were more infested by nematodes, banane plants receiving 100% NO3- developed better than the less infested plants grown in the medium containing 40% NO3-.
| Main Authors: | , , , |
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| Format: | article biblioteca |
| Language: | eng |
| Subjects: | H10 - Ravageurs des plantes, F04 - Fertilisation, Radopholus similis, technique de culture, pouvoir pathogène, aptitude à coloniser, dose d'application, azote, fertilisation, http://aims.fao.org/aos/agrovoc/c_24799, http://aims.fao.org/aos/agrovoc/c_24396, http://aims.fao.org/aos/agrovoc/c_5629, http://aims.fao.org/aos/agrovoc/c_36703, http://aims.fao.org/aos/agrovoc/c_16113, http://aims.fao.org/aos/agrovoc/c_5192, http://aims.fao.org/aos/agrovoc/c_10795, |
| Online Access: | http://agritrop.cirad.fr/401109/ http://agritrop.cirad.fr/401109/1/401109.pdf |
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| Summary: | A flowing solution culture technique was used to study the effects of N nutrition on banane root infestation by the burrowing nematode #Radopholus similis#. Paired groups of banana plants were grown in separate compartments containing coarse sand (2-5 mm diameter). Input nutrient solutions had fixed compositions and identical total N concentrations. The two compartments differed in their NH4+/total N concentrations, one receiving 0% NH4+/total N (100% NO3-/total N) and the other 60% NH4+/total N (40% NO3-/total N). The compartments were connected by a inverted T-shaped tube containing fine sand (200-250 um diameter) through which nematodes were inoculated. The pH and N concentrations of the output solution were determined at regular intervals. The pH of the output solution differed markedly between the two compartments, with values of 6 8 and 3 6 in the 0% and 60% NH4+ compartments, respectively. In the compartment receiving 0% NH4+, the number of nematodes in the roots and the growth of banane plants was significantly higher than in the compartment receiving 60% NH4+. Even though they were more infested by nematodes, banane plants receiving 100% NO3- developed better than the less infested plants grown in the medium containing 40% NO3-. |
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