eprintid: 1923
rev_number: 15
eprint_status: archive
userid: 14
dir: disk0/00/00/19/23
datestamp: 2011-09-26 03:38:11
lastmod: 2013-09-17 11:07:01
status_changed: 2011-09-26 03:38:11
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@cgiar.org
item_issues_count: 0
creators_name: Buerkert, A
creators_name: Bationo, A
creators_name: Dossa, K
icrisatcreators_name: Bationo, A
affiliation: Institute of Crop Science(Witzenhausen)
affiliation: ICRISAT(Niamey)
affiliation: IFDC-Africa(Lome)
country: Germany
country: Niger
country: Togo
title: Mechanisms of Residue Mulch-Induced Cereal Growth Increases in West Africa
ispublished: pub
subjects: S1.5
subjects: s1.4
full_text_status: restricted
note: The authors are grateful to A. Moussa, M. Bachir, A. Thiombiano, and I. Oumarou for their technical help at sampling and sample analysis, to H. Traore´ (INERA, Burkina Faso) and ICRISAT Sahelian Center for logistical support and to F. Graef for his help with soil classification. They also thank  B. Buerkert, B. Ge´ rard, S. Alvey, V. Roemheld, N. van Duivenbooden, E.A. Kirkby, and three anonymous reviewers for their constructive comments on earlier versions of this paper.
abstract: The use of crop residues (CR) has been widely reported as a means of increasing crop yields across West Africa. However, little has been done to compare the magnitude and mechanisms of CR effects systematically in the different agro-ecological /ones of the region. To this end. a series of field trials with millet (Pennisetam glaacam L.), sorghum \Sorgham bicolor (L.) Moenchj, and mai/e (Zea mays L.) was conducted over a 4-yr period in the Sahclian, Sudaiiian. and Cuinean /ones of West Africa. Soils ranged in pi I from 4.1 to 54 along a rainfall gradient from 510 to 13011 mm. Treatments in the factorial experiments were three CR rates (0. 500. and 2000 kg ha"1) and several levels of phosphorus and nitrogen. The results showed CR-induced total dry matter (TDM) increases in cereals up to 73% for the Sahel compared with a maximum of 16% in the wetter Su-danian and Guinean /ones. Residue effects on weakly buffered Sahel-ian soils were due to improved P availability and to a protection of seedlings against wind erosion. Additional effects of CR mulching on topsoil properties in the Sahel were a decrease in peak temperatures by 4 °C and increased water availability. These mulch effects on soil chemical and physical properties strongly decreased from North to South. Likely explanations for this decrease are the decline of dust deposition and wind erosion hazards, the higher soil clay content, lower air temperature, and a faster decomposition rate of mulch material with increasing! rainfall from the Sahel to the Sudanian and Ciiin-ean /ones.
date: 2000
date_type: published
publication: Soil Science Society of America Journal
volume: 64
number: 1
publisher: Soil Science Society of America
pagerange: 346-358
refereed: TRUE
issn: 1435-0661
official_url: http://dx.doi.org/10.2136/sssaj2000.641346x
related_url_url: http://scholar.google.co.in/scholar?as_q=Mechanisms+of+Residue+Mulch-Induced+Cereal+Growth+Increases+in+West+Africa&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&as_sdt=1.&as_sdtp=on&as_sdtf=&a
related_url_type: pub
citation:   Buerkert, A and Bationo, A and Dossa, K  (2000) Mechanisms of Residue Mulch-Induced Cereal Growth Increases in West Africa.  Soil Science Society of America Journal, 64 (1).  pp. 346-358.  ISSN 1435-0661     
document_url: http://oar.icrisat.org/1923/1/SSAJ64_1_346-358_2000.pdf