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Title: | Denitrification and total N losses from an irrigated sandy-clay loam under maize–wheat cropping system |
Authors: | Mahmood, T. Malik, Dr. Kauser .A. Shamsi, S.R.A. Sajjad, M.I. |
Keywords: | denitirification crop system |
Issue Date: | Feb-1998 |
Publisher: | springer link |
Citation: | Mahmood, T., Malik, K., Shamsi, S. et al. Denitrification and total N losses from an irrigated sandy-clay loam under maize–wheat cropping system. Plant and Soil 199, 239–250 (1998). https://doi.org/10.1023/A:1004335132617 |
Series/Report no.: | Plant and Soil 199, 239–250 (1998).; |
Abstract: | Denitrification and total N losses were quantified from an irrigated field cropped to maize and wheat, each receiving urea at 100 kg N ha-1. During the maize growing season (60 days), the denitrification loss measured directly by acetylene inhibition-soil cover method amounted 2.72 kg N ha-1 whereas total N loss measured by 15N balance was 39 kg ha-1. Most (87%) of the denitrification loss under maize occurred during the first two irrigation cycles. During the wheat growing season (150 days), the denitrification loss directly measured by acetylene inhibition-soil cover and acetylene inhibition-soil core methods was 1.14 and 3.39 kg N ha-1, respectively in contrast to 33 kg N ha-1 loss measured by 15N balance. Most (70-88%) of the denitrification loss under wheat occurred during the first three irrigation cycles. Soil moisture and NO -3-N were the major factors limiting denitrification under both crops. Higher N losses measured by 15N balance than C2H2 inhibition method were perhaps due to underestimation of denitrification by C2H2 inhibition method and losses other than denitrification, most probably NH3 volatilization. |
Description: | https://doi.org/10.1023/A:1004335132617 |
URI: | http://localhost:8080/xmlui/handle/123456789/1355 |
Appears in Collections: | School of Life Sciences |
Files in This Item:
File | Description | Size | Format | |
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Denitrification and total N losses from an irrigated sandy-clay.pdf | 3.82 MB | Adobe PDF | View/Open |
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