Abeer S. Arafa, Heba M.A. Khalil and Sana G. Gebaly( 2013). Impact of eco- friendly fertilizers and rice straw on cotton yield and fiber physical propertiesInternational Science and Investigation Journal Vol 8(2) 2251-2264.
Abstract: This investigation was conducted at Cotton Research Institute, Agric. Res. Center, Egypt , during 2012and 2013 seasons to study the effect of applying clay soil with rice straw as organic wastes , and the inoculation with some bacterial strains as biofertilizer (PGPR) and Humic acid both separately or together with or without rice straw on (soil chemical and biological properties) , (cotton yield and some yield components, (leaf chemical analysis) and (cotton fiber properties )compared to the control.
The most important results can be summarized as follows: Adding rice straw achieved the highest content of soil organic matter compared to the rest of the transactions under study .Adding bacterial strains led to increase soil biological activity compared to the rest of the transactions, as well as the control treatments. This reflected directly on all the characters under study. The treatment of mixed bacteria strains (PGPR) and Humic acid in the presence of rice straw increased the soil content of N, P, K elements along with the soil softness, soil total fungi, bacteria actinomycetes counts, as well as, boll weight (gm), lint percentage, seed index and seed cotton yield (Kentar/fed.), the Leaf chemical analysis (mg/g dry weight), and fiber physical properties under the study. On the other hand the pervious treatments decreased the degree of pH and EC of the soil and the fiber yellowness characters which followed an opposite situation than the rest of fiber characters .While, influence of main factors were not significant on fiber elongation percentage.
Keywords: (cotton-fertilizer-organic-humic-PGPR-fiber-increase)
