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Soil management for raising crop water productivity in rainfed production systems in Lao PDR.
- Source :
- Archives of Agronomy & Soil Science; Jan2016, Vol. 62 Issue 1, p53-68, 16p
- Publication Year :
- 2016
-
Abstract
- This study investigated the impacts of organic- and clay-based soil amendments, and their combinations on crop water productivity (CWP) using maize as a test crop. On-station field trials were established over two consecutive years at the Naphok and Veunkham sites in Laos. At each site, 10 treatments were applied in a randomized complete block design with three replications. The treatments were control, rice husk biochar (10 t ha−1), bentonite clay (10 t ha−1), compost (4 t ha−1), clay-manure compost (10 t ha−1), rice husk biochar compost (10 t ha−1), bentonite clay + biochar, bentonite-clay + compost, biochar + compost, and bentonite clay + biochar + compost. All treatments were applied in 2011. Significant (p < 0.05) treatment effects in CWP and growing period evapotranspiration were determined. At Naphok, differences between the amended and control plots in CWP varied between 0.1 and 0.6 kg m−3in 2011 and from 0.1 to 0.4 kg m−3in 2012, whereas differences at Veunkham varied between 0.3 and 1.0 kg m−3in 2011 and from 0.05 to 0.29 kg m−3in 2012. At both sites, CWP in 2012 was significantly lower than 2011. Our results illustrate that organic- and clay-based soil amendments improve CWP, indicating that soil-based interventions could be suitable options for improving agricultural productivity. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 03650340
- Volume :
- 62
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Archives of Agronomy & Soil Science
- Publication Type :
- Academic Journal
- Accession number :
- 110838469
- Full Text :
- https://doi.org/10.1080/03650340.2015.1037297