University of Khartoum

Fate of Fertiliser N Applied to A Guar-wheat Rotation System as Influenced by Crop Residue Incorporation in A Semi-arid Vertisol

Fate of Fertiliser N Applied to A Guar-wheat Rotation System as Influenced by Crop Residue Incorporation in A Semi-arid Vertisol

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Title: Fate of Fertiliser N Applied to A Guar-wheat Rotation System as Influenced by Crop Residue Incorporation in A Semi-arid Vertisol
Author: Salih, Nazar Omer Hassan; Abdalla, Mubarak Abdelrahman; Hassabo, Ali Ahmed
Abstract: N recovery from inorganic fertiliser in the crop/soil systems was monitored for five seasons in a guar-wheat crop rotation. N15 recoveries in straw, head and total recovery in crop residue and residue removal plots were 22.46, 15.55, 38.01 and 21.16, 15.55, 36.71, respectively. It was observed that continuous incorporation of fertiliser with crop residue improved, over the inorganic fertiliser without crop residue by 20.46 %. In the 2nd, 3rd, 4th, 5th and 6th crops in the cycle, incorporation of inorganic fertiliser with crop residue had increased N retention of the topsoil, over the inorganic fertiliser without crop residue, by 4.6, 10.1, 3.4, 11.9 and 1.6%, respectively. At the end of the 6th crop, total N recovery in inorganic fertiliser with crop residue treated plots was 38.17% and 36.91% in the inorganic fertiliser without crop residue plots. It could be concluded that continuous application of crop residues along with fertilisers improved chances of N recoveries and reduces losses. N derived from fertiliser (Ndff)in the seeds or pods through all seasons except the 2nd season in crop residue with inorganic fertiliser was higher than inorganic fertiliser without crop residue by 8.98 %, 7.77 %, 33.33% and 1.37% for the, 3rd ,4th ,5th and 6th season respectively, also ndff fertiliser N (%) in the seeds or pods through all seasons in crop residue with inorganic fertiliser and without crop residue was higher than ndff fertiliser N (%) in the straw.It could be concluded that continuous application of crop residues along with fertilisers improved chances of N recoveries and reduces losses.
URI: http://khartoumspace.uofk.edu/123456789/22362


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