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首页> 外文期刊>Archives of Agronomy and Soil Science >Soil management for raising crop water productivity in rainfed production systems in Lao PDR
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Soil management for raising crop water productivity in rainfed production systems in Lao PDR

机译：在老挝的雨养生产系统中通过土壤管理提高作物水分生产率

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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 (101 ha~(-1)), bentonite clay (101 ha~(-1)), compost (41 ha~(-1)), clay-manure compost (lOt ha~(-1)), rice husk biochar compost (10 t ha '), 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~(-3) in 2011 and from 0.1 to 0.4 kg m~3 in 2012, whereas differences at Veunkham varied between0.3 and 1.0 kg m~3 in 2011 and from 0.05 to 0.29 kg m~3 in 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 couldbe suitable options for improving agricultural productivity.
机译：这项研究使用玉米作为试验作物，研究了有机和粘土基土壤改良剂及其组合对作物水分生产率（CWP）的影响。连续两年在老挝的Naphok和Veunkham地点建立了现场试验。在每个部位，以三个重复重复的随机完整区组设计应用10种治疗方法。处理包括对照，稻壳生物炭（101 ha〜（-1）），膨润土（101 ha〜（-1）），堆肥（41 ha〜（-1）），粘土肥料堆肥（10t ha〜（ -1）），稻壳生物炭堆肥（10吨/小时），膨润土+生物炭，膨润土-粘土+堆肥，生物炭+堆肥以及膨润土+生物炭+堆肥。所有处理均在2011年进行。确定了CWP和生长期蒸散量的显着（p <0.05）处理效果。在纳福克（Naphok），2011年CWP的修正图和对照图之间的差异在0.1至0.6 kg m〜（-3）之间变化，在2012年从0.1至0.4 kg m〜3之间变化，而Veunkham的差异在0.3至1.0 kg m〜3之间变化2011年为〜3，2012年为0.05至0.29 kg m〜3。在这两个地点，2012年的CWP均显着低于2011年。我们的结果表明，基于有机和粘土的土壤改良剂可提高CWP，表明基于土壤的干预措施可能是提高农业生产率的合适选择。

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