The effect of raised beds on soil structure, waterlogging, and productivity on duplex soils in Western Australia
The effect of raised beds on soil structure, waterlogging, and productivity on duplex soils in Western Australia
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DOI：
10.1071/sr03118
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发表时间：
2005-01-01
影响因子：
--
通讯作者：
Spann, C
中科院分区：
文献类型：
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作者：
Bakker, DM;Hamilton, GJ;Spann, C
长期以来，西澳大利亚州双重土壤根区的水涝和土壤结构不良一直被认为是农作物和牧场生产的主要制约因素。研究了复合土壤中垫高对土壤结构、生产力和淹水的影响。建立了五个实验点，监测和运行超过5年，以及3个更大规模的示范点，运行超过4年或3年。处理包括提高床和作为对照的正常免耕苗床。这些苗床是在土壤深耕后用造床机铺成的。体积密度和稳态渗透率的观察表明显着和持久的改善土壤结构的床。积水的发病率在提高床减少，这是伴随着增加径流从提高床。在各种气候条件和双重土壤下，各种作物的平均谷物产量增加了18%。在西澳大利亚州引入大面积耕作的高架床七年后，估计现在有超过30000公顷的作物生长在高架床上。
Waterlogging and poor soil structure in the root-zone of duplex soils in Western Australia has long been recognised as a major constraint to the production of agricultural crops and pastures. The effect of raised beds on waterlogging, soil structure, and productivity of duplex soils was investigated. Five experimental sites were established, monitored, and operated over 5 years as well as 3 larger scale demonstration sites which were operated over 4 or 3 years. Treatments consisted of raised beds and a normal no-till seed bed as the control. The beds were made with a bed former after the soil had been deep cultivated. Bulk density and steady-state infiltration rate observations indicated significant and lasting improvements in soil structure in the beds. The incidence of waterlogging in raised beds was reduced and this was accompanied by an increase in runoff from the raised beds. The average grain yield increase from the beds was 18% for a variety of crops across a range of climatic conditions and duplex soils. Seven years after the introduction of raised beds for broad-acre farming in Western Australia, more than an estimated 30 000 ha of crops is now grown on raised beds.