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首页> 外文期刊>Acta Horticulturae >The involvement of Fusarium spp. and toxins in the asparagus replant problem
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The involvement of Fusarium spp. and toxins in the asparagus replant problem

机译：镰刀菌属的参与。和毒素在芦笋再植问题

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In a pot trial, seedling asparagus was exposed to two species of Fusarium inoculum (F. moniliforme [Gibberella fujikuroi] and F. oxysporum) in virgin soil and soil with a history of asparagus production. Both soils were either fumigated with chloropicrin or non-fumigated. Dry matter production was approximately 50% higher in the virgin soil than the replant soil and in the virgin soil fumigation with chloropicrin resulted in bigger plants. The suppression of asparagus seedlings in the replant soilcompared with virgin soil was not reduced by fumigating the soil and therefore could be attributed to phytotoxic material in the replant soil rather than soilborne pathogens. In both replant and virgin soils oatseed Fusarium inoculum increased the numbers of Fusarium lesions on the asparagus seedling roots and reduced seedling growth more than conidial suspensions. Both types of inoculum had increased effect at the higher rate (20 000 vs. 80 000 conidia/pot). Root lesion scores were as useful as plant dry weights for indicating suppression of asparagus seedlings grown with different rates or forms of Fusarium inoculum. Crown rot scores were not as sensitive as either root lesion scores or shoot and root dry weights to the suppression caused by either inoculum form of the phytotoxic material in replant soil.
机译：在盆栽试验中，将芦笋幼苗暴露于原始土壤和有芦笋生产史的土壤中的两种镰刀菌接种菌（F. moniliforme [Gibberella fujikuroi]和oxysporum）。两种土壤都用氯仿熏蒸或不熏蒸。在原始土壤中，干物质产量比在重新种植的土壤中高约50％，并且在原始土壤中用氯化苦熏蒸产生了更大的植物。与原始土壤相比，熏蒸土壤并不能减少对芦笋幼苗的抑制作用，因此，可以归因于种植土壤中的植物毒性物质，而不是土壤传播的病原体。在再种植和原始土壤中，燕麦种子镰刀菌接种物比分生孢子悬浮液增加了芦笋幼苗根部的镰刀菌病斑数量，并减少了幼苗的生长。两种类型的接种物均以较高的比率（2万对分生孢子/ 80 000分生孢子/盆）产生了更高的效果。根部病变评分与植物干重一样有用，可表明抑制了不同比例或形式的镰刀菌接种的芦笋幼苗的生长受到抑制。冠腐分数不如根病变分数或枝条和根干重对接种土壤中任何形式的植物毒性物质引起的抑制敏感。

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