Effects of arbuscular mycorrhiza fungi on growth and yield of cotton

Effects of arbuscutar mycorrhiza fungi(AMF)including gaspora rosea，glomus mosseae and glomus versiforme on growth and yield of cotton in fertilized and non-fertilized fields with Phosphorus(3Ca(H₂PO₄)₂·H₂O+7Ca SO₄)are studied．The results show that the AMF is gble to increase the photosynthetic rate，improve water status，promote cotton growth and increase its yield．especially the yield hefore frost season．Glomus versiforme is the most efective species in increasing cotton yield．