Growth, Yield and Nutritional Status of Egyptian Lupine in Sandy Soil in Relation to Bio and Non Conventional Potassium Fertilization

摘要

TWO fieid experiments were conducted in the experimental farm of the Salah El-Din, El-Bostan, Nobaria, El-Behera Governorate, Egypt which belongs to NRC during 2007and 2008 to evaluate K fertilization using some non- conventional products, i.e , K feldspar, compost of plant residues rich in their K content and their mixture with or without inoculation with the K dissolving bacteria (Bacillus circulans) (K.D.B) on growth, yield and nutritional status of Egyptian lupinus tennis L x.v Giza 2. Obtained results indicated the effective role of K.D.B. when combined with K-fertiiization using feldspars, composts and their mixtures. Growth parameters, yield and nutritional status of the plants were significantly increased by applying such types of non-conventional K-fertilizers particularly in the case of seeds inoculation with K.D.B. A conclusion was drawn that using such natural sources of K-fertilizers combined with K dissolving bacteria may become a suitable solution for reducing the heavy use of non- friendly chemical fertilizers.