Mahmoud Y.I., El-Akshar Y.S., Abd Elgwad Sh. A. and Afifi M.M.I.( 2020). Impact of Mature Compost Derivatives and Inorganic Fertilizers on the Growth and
Productivity of Pea Plants
Middle East J. Agric. Res., 9(2): 455-467, 2020 EISSN: 2706-7955 ISSN: 2077-4605
Abstract: The rice straw was composted with cattle dung, as a raw material, and inoculated with a mixture of Trichoderma viride and Phanerochaete chrysosporium. The humic substances (HS) and compost tea (CT) were prepared after the compost maturation phase. The study aimed to evaluate the biostimulant activity of HS and CT, as organic fertilizer integrated with synthetic inorganic fertilizers (NPK), on the rhizosphere biological activity, growth and productivity of pea (Pisum sativum L.) plants in clay soil. The data revealed that addition of organic fertilizers at different forms or rates
stimulated high microbial count as compared with mineral fertilizers. As the rate of mineral fertilizers increased (50, 75 to 100% of NPK) the biological status revealed a depletion either in the total microbial count or the enzyme activities. The absolute addition of a full dose of mineral fertilizers has prohibited the nodulation on pea plants while that organic fertilizers at different forms (CT or HS) or two rates (50 or 100%) have fostered the nodulation on the base of nodules number or nodules dry
weight. The combined addition of compost tea and humic substances with half dose or 75% of NPK revealed improvement in the nutrition status, in seed and straw of pea plants, against the full dose of NPK or individual treatments of compost tea or humic substances. Furthermore, a half dose of NPK in combined addition of 50% of humic substances and compost tea yielded the highest seed and straw yield as well as total protein percent in seeds. It could be concluded that the combination treatment between compost tea and humic substances with half quantity of NPK fertilizer which contributes to lowing pollution of NPK fertilizers, and decreased the costs by using friendly organic and bioorganic fertilizer with the environment, and to compensate NPK fertilizer for Peas Plants.
Keywords: (Pisum sativum, Humic substances, compost tea, compost derivatives )
