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首页> 外文会议>2003 Conference of the Australian Society of Sugar Cane Technologists: Abstracts >THE EFFECT OF ROTATIONAL BREAKS FROM CONTINUOUS SUGARCANE ON SOIL PHYSICAL PROPERTIES
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THE EFFECT OF ROTATIONAL BREAKS FROM CONTINUOUS SUGARCANE ON SOIL PHYSICAL PROPERTIES

机译：连续甘蔗旋转断裂对土壤物理性质的影响

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摘要

This paper reports on the effect of various breaks from continuous sugarcane on soilrnphysical properties as part of the sugar yield decline joint venture. Field trials werernconducted at Tully, Bundaberg, and in the Burdekin valley to examine the impact ofrnvarious types of breaks from continual sugarcane on soil physical properties. The breaksrnconsisted of a pasture, a break crop and a bare fallow, and were designed to generaterndifferences in soil conditions before planting back to sugarcane. Soil physical propertiesrnwere assessed during the breaks as well as at the end of the break period, to quantifyrnboth the rate and extent of change in soil properties. Soil bulk density decreased withrnthe frequency of soil disturbance, the amount of root activity and increased in the arearntrafficked by tractors, harvesters and haulouts. However, soil bulk density is notrnnecessarily a good indicator of soil hydraulic properties, with pastures, although havingrnhigh bulk density also, containing large numbers of macro pores resulting highrnhydraulic conductivity. Compacted inter-rows in continuous cane, and to a lesser extentrnalternate crops, resulted in very low hydraulic conductivity. Crop and bare fallowrntreatments were less able to infiltrate incident rainfall, unless surface cover was present,rndue to lower aggregate stabilities and a greater tendency to develop surface crusts.rnLowest infiltration capacity was generally in the continuous cane treatments ? duernprimarily to the high proportion of the ground surface area that was compacted. Breaksrnalso resulted in small but significant increases in soil water holding capacity, relative torncontinuous cane. Data presented in this study show that sugarcane culture can providernrelatively good soil physical conditions (at least in the crop rows), provided wheelrntraffic and resultant compaction can be avoided in future farming systems.
机译：本文报道了连续甘蔗的各种中断对土壤物理特性的影响，这是合资企业糖产量下降的一部分。在班德堡的塔利和伯德金山谷进行了田间试验，以研究连续甘蔗产生的各种断裂对土壤物理特性的影响。中断包括牧场，中断作物和裸露的休耕地，旨在在播种回甘蔗之前在土壤条件下产生差异。在休耕期和休耕期末评估土壤物理性质，以量化土壤性质变化的速率和程度。土壤容重随土壤扰动频率，根系活动量的增加而下降，而在拖拉机，收割机和农作物运种的区域中，土壤容重增加。然而，尽管草场也具有高的堆密度，但包含大量的大孔隙导致高的水力传导率，尽管如此，对于草场来说，土壤的堆密度并不是良好的指示。连续甘蔗行间密实，行间较稀疏，导致交替耕作的水力传导率非常低。除非有表层覆盖，否则作物和裸露的降雨处理方法无法渗透到降雨中，除非骨料的稳定性较低，而且有更大的发展结皮的趋势。主要是由于被压实的地面面积比例高。 Breaksrn还导致相对于连续甘蔗而言，土壤持水量小幅但显着增加。这项研究提供的数据表明，如果可以在未来的耕作系统中避免轮流和由此造成的压实，甘蔗栽培可以提供相对良好的土壤物理条件（至少在作物行中）。

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