Effect of legumes succession under different liming levels on the development and mycorrhizae of wheat

Triticum aestivum was cropped in a quartz sand soil, in the region of Assis, State of São Paulo, Brazil, following soil that was kept fallow or soil that was previously cropped with Glycine max, Crotalaria paulina, Crotalaria juncea or Stizolobium aterrimum. All the treatments were submitted to three different doses of lime (0, 2 and 4 t/ha). The plants were evaluated in relation to mycorrhizae; shoot and root dry weight: grain production: and, phosphorus content in the flag leaf. The soil was analyzed in relation to phosphorus and mycorrhizal fungi sporos number. At 21-day plant emergence, the treatments that had received lime and one cropped with C. paulina showed higher percentage of: mycorrhizal colonization in the roots; shoot dry matter; and, grain production when compared to those that were cropped with G. max or kept fallow. The soil phosphorus content and the root fungi colonization did not reflect the nutritional status of wheat in relation to the element.

mycorrhizae; wheat; liming; green manure; phosphorus

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