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دور المستخلصات المائية لبعض النباتات في تحولات النتروجين ونمو نبات الذرة الصفراء L. Zea mays في تربة معاملة بالمخلفات العضوية == Role of Some Plant Aqueous Extract on Nitrogen Transformation and Growth of Corn (Zea mays L .) in Soil Treated With Organic Residues
Author name:
مؤيد ابراهيم علي
Supervisor name:
عبد المهدي صالح حسين الانصاري
General topic:
Agricultural sciences
Specific topic:
Soil and Water
Degree:
Master
University:
University Of Basrah - Faculty Of Agriculture
Language:
Arabic
University location:
Basrah
First pages:
31T1867 - p.pdf
Abstract:
Series of incubation and pots experiments were conducted in laboratories and green house of the college of agriculture university of Basrah , to study the role of plants aqueous extracts of Caper seeds, pomegranate peels , date palm fiber and blady grass rhizomes and chemical nitrification inhibitor dicyandiamide (DCD) on nitrogen mineralization , nitrification inhibition, ammonia volatilization addition to growth and N,P,K conc. of corn plant grown in soil sandy loam treated with organic residues of poultry manure, cow manure, alfalfa residue and corn cubs.aqueous extracts were prepared at ratio of 1 : 10 ( plant material : water)and added at conc. of 0.25 ml gm - 1 soil to soil treated with 5% organic residue. Above experiments were repeated by addition of 500 mg N kg - 1soil as (NH4)2SO4 . Soils were incubated at 35 °C for 15,30,45,60 and 75 days . After each incubation period set of samples was withdraw and NH4+, NO3¯ were measured then nitrification inhibition was calculated . Ammonia volatilization was measured at 2,7,14,21,28,35,42,49 and 56 days of incubation. Dry weight, N, P and K conc. in plant was measured after 60 days of corn growth.Results of the study showed : 1 - Application of water extracts of caper seeds, date palm fiber and DCD significantly increased NH4+ - N release from organic residues . Highest increased obtained with caper extract .2 - Higher N mineralization (NH4+, NO3¯ ) was associated with poultry manure as compared with other organic sources.3 - Application of N fertilizer significantly increased of organic N release (NH4+, NO3¯ ) and decreased nitrification inhibition for all treatments.4 - Increasing incubation time significantly increased NO3¯ amount release, but decreased NH4+ amount release and nitrification inhibition .
