In:
Applied and Environmental Soil Science, Hindawi Limited, Vol. 2016 ( 2016), p. 1-13
Abstract:
Due to anaerobic conditions that develop in soils under flooded-rice ( Oryza sativa L.) production, along with the global extent of rice production, it is estimated that rice cultivation is responsible for 11% of global anthropogenic methane (CH 4 ) emissions. In order to adequately estimate CH 4 emissions, it is important to include data representing the range of environmental, climatic, and cultural factors occurring in rice production, particularly from Arkansas, the leading rice-producing state in the US, and from clay soils. The objective of this study was to determine the effects of previous crop (i.e., rice or soybean ( Glycine max L.)) and cultivar (i.e., Cheniere (pure-line, semidwarf), CLXL745 (hybrid), and Taggart (pure-line, standard-stature)) on CH 4 fluxes and emissions from rice grown on a Sharkey clay (very-fine, smectitic, thermic Chromic Epiaquerts) in eastern Arkansas. Rice following rice as a previous crop generally had greater ( p 〈 0.01 ) fluxes than rice following soybean, resulting in growing season emissions ( p 〈 0.01 ) of 19.6 and 7.0 kg CH 4 -C ha −1 , respectively. The resulting emissions from CLXL745 (10.2 kg CH 4 -C ha −1 ) were less ( p = 0.03 ) than those from Cheniere or Taggart (15.5 and 14.2 kg CH 4 -C ha −1 , resp.), which did not differ. Results of this study indicate that common Arkansas practices, such as growing rice in rotation with soybean and planting hybrid cultivars, may result in reduced CH 4 emissions relative to continuous rice rotations and pure-line cultivars, respectively.
Type of Medium:
Online Resource
ISSN:
1687-7667
,
1687-7675
DOI:
10.1155/2016/9542361
Language:
English
Publisher:
Hindawi Limited
Publication Date:
2016
detail.hit.zdb_id:
2467232-4
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