Mazen, O. A. O. ( 2013). Effect of Mineral, Organic and Biological Fertilization on Nutrients and Heavy Metals Status in A Clay Soil Cultivated With Wheat Plants .Egypt. J. of Appl. Sci., 28 (6B)2013 174-195
Abstract: To study the effect of different rates of compost(0, 5, 10 and 15m3/fed.) and anhydrous ammonia (0, 25, 50 and75 kg N/fed) application under biofertilizer inoculation on nitrogen forms and availability of P, K, Fe, Mn, Zn, Pb and Ni at 30, 90 days from sowing and at harvest in soil cultivated with wheat plants, two successive field experiments carried out in the Experimental Farm of the Agriculture Research Station at Sakha, Kafr El-Sheikh, Governorate, (N 310oo, E 300 59- at an altitude 6 m.), Egypt, during 2008/ 2009 and 2009/ 2010 seasons. The obtained results indicated that:
1-Increasing anhydrous ammonia rate clearly increased nitrate and ammonium concentrations as well as total available nitrogen but insignificant effect was obtained for nitrite, P, K, Fe, Mn, Zn, Pb and Ni in soil at different periods compared with untreated plots.
2-Increasing compost rate clearly increased the amounts of nitrate, ammonium, total available nitrogen, P, K, Fe, Mn, Zn, Pb and Ni in the soil but these treatments obtained insignificant increase in nitrite in soil at different periods compared with untreated plots.
3-The inoculation with Bacillus Polymexa increased the amounts of ammonium and total available nitrogen, while an increase was noticed for nitrite, nitrate, P, K, Fe, Mn, Zn, Pb and Ni concentrations of the soil at different periods compared with untreated plots.
4-The lowest values of nitrite, nitrate, ammonium, total available nitrogen, P, K, Fe, Mn, Zn, Pb and Ni were obtained with untreated plots. While, the highest values of nitrite, nitrate, ammonium, total available nitrogen, P, K, Pb and Ni were obtained when compost at the rate of 15 m3/fed. + Biofertilizer inoculation +75 kg N/fed. Anhydrous ammonia was added. The highest amounts of Fe, Mn, and Zn were obtained at the application of compost at the rate of 15 m3/fed. + 25 kg N/fed. anhydrous ammonia without biofertilizer inoculation.
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