Heba M.A. Khalil and Rokaya M. Hassan( 2015). Raising the productivity and fiber quality of both White and colored cotton using eco- friendly fertilizers and rice strawInternational Journal of plant Research .5(5) :122-135
Abstract: This study was performed at Giza station, Cotton Res. Inst., Agric. Res. Center, Egypt, during 2012 and 2013 seasons. To decrease the chemical pollution of soil and underground water and study the effect of applying clay soil with rice straw as organic wastes, and the inoculation with some bacterial strains as biofertilizer (PGPR) (Trichoderma reesei, richoderma viride, Pseudomonas putida, Bacillus polymexa, Bacillus megaterium). Together with or without rice straw using eco-friendly crop such as, colored cotton because of the lack need for chemicals during bleaching and dyeing processes. As well as, study their effect on soil chemical and biological properties and their impact on the green and brown colored cotton fiber quality comparing to the chemical fertilizers, and cotton yield and some yield components and cotton fiber properties comparing to the control. Green cotton (mutation from G.89), brown cotton (mutation from G.83) and G.86 as white cotton as 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 compost in the presence of rice straw increased the soil content of N, P, K elements along with the soil softness, soil total fungi, total counts of bacteria, as well as boll weight (g), lint percentage (%) and seed cotton yield (Kentar/fed.), and fiber structure and physical properties under the study. Also, the white cotton surpassed the green and brown cotton for all factors under the study as well as, the soil biological activity in terms of increasing the total bacterial, total Fungi counts, CO2 evolution. So, we can use this treatment safely to produce bio organic colored cotton. Generally, it could be concluded that the use of the treatment of spraying mixed of bacterial strains (PGPR) and compost in the presence of rice straw is useful for the colored cotton, and enhancement of soil chemical and biological properties. On the other hand, the pervious treatments decreased the degree of pH and EC of the soil. While, influence of cotton rice straw and fertilizers treatment were not significant on fiber cross section perimeter. Also, influence of fertilizers treatment and interaction between genotypes x fertilizer treatments were not significant on upper half mean and uniformity index.
Keywords: (Rice straw, Cotton, Fertilizer, Organic, Compost, PGPR, Fiber)
