Seasonal variation in denitrification in a clay soil under a cultivated crop and a permanent pasture

K.L.Weier K.L.WeierK.L.Weier K.WeierK. L.https://api.elsevier.com/content/author/author_id/6602759381 (1991) Seasonal variation in denitrification in a clay soil under a cultivated crop and a permanent pasture. Soil Biology and Biochemistry, 23 7: 629-635. doi:10.1016/0038-0717(91)90075-U


Author K.L.Weier K.L.WeierK.L.Weier K.WeierK. L.https://api.elsevier.com/content/author/author_id/6602759381
Title Seasonal variation in denitrification in a clay soil under a cultivated crop and a permanent pasture
Journal name Soil Biology and Biochemistry   Check publisher's open access policy
ISSN 0038-0717
Publication date 1991-01-01
Sub-type Article (original research)
DOI 10.1016/0038-0717(91)90075-U
Open Access Status Not yet assessed
Volume 23
Issue 7
Start page 629
End page 635
Total pages 7
Language eng
Subject 2404 Microbiology
1111 Soil Science
Abstract Biological denitrification in a clay soil was measured under the annual crop black gram (Vigna mango) and the perennial pasture grass green panic (Panicum maximum var trichoglume). The soil treatments were: water, water plus CH, or water plus CH plus glucose applied down brass tubes to depths of 7.5, 22.5, 52.5 and 112.5 cm. Soil gas samples were taken just before and 24 h after treatments were applied. Treatments and samplings were repeated every 3 months for 2 years. In untreated soil, the amounts of NO from crop and pasture were highest in spring and summer with approximately 75% of the total amount being measured. For black gram, this represented equal amounts in spring and summer (approx. 34g NO-N ha) whereas for green panic, 25.9g NO-N ha was found in spring and 9.2g NO-N ha in summer. Soil water was correlated with NO concentration beneath black gram (r = 0.87, d.f. = 6, P < 0.01) and CO concentration under green panic (r = 0.69, d.f. = 6, P < 0.05). Multiple regression analysis showed that 87.8% of the variation in NO concentration from beneath black gram was associated with monthly rainfall and NOconcentration. Gas samples collected 24 h after the application of the treatments showed that NO and CO concentration did not vary between treatments. However, treatment application did increase the NO found beneath black gram. A mean increase of 29 g NO-N ha was observed in January, 1986. Concentration of NO changed little after the application of the treatments to green panic. NO due to microsite activity represented 11% of the measured loss of nitrate from the subsoil in the field.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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