Impact of soil spatial variability on young almond trees: A case study on heavy clay soils

IF 1.3 Q3 AGRONOMY
Carlos Ballester, Rodrigo Filev-Maia, John Hornbuckle
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Abstract

The viability of modern horticulture heavily relies on adopting sustainable practices. Understanding soil spatial variability on heavy clay soils and its impact on young trees is crucial to design suitable soil and water management strategies that guarantee the sustainability of orchards. The objective of this study was to assess in an orchard with heavy clay soils of the Riverine Plain, NSW, the impact of soil spatial variability on the development of young almond (Prunus dulcis (Mill.) D. A. Webb) trees and evaluate the use of remote and proximal sensing tools for identifying threatening factors for the sustainability of the crop. Soil and aerial surveys were used to assess the soil and crop spatial variability in an 8.3-ha irrigation block. The site was divided into five areas based on apparent electrical conductivity (ECa) measurements where soil samples were collected. Tree growth, soil, and plant water status were monitored in two contrasting areas in ECa. In the first year of study, a significant and positive correlation was found between ECa and percentage of ground canopy cover. Soil analysis and soil moisture monitoring revealed that high values of exchangeable sodium percentage, which are indicative of sodic soils prone to dispersion, and limited water infiltration were the cause of the reduced tree growth in areas with low ECa. The impact of soil spatial variability on tree growth decreased in the second growing season due to weather and water management factors that influenced soil water content. This study showcases the usefulness of remote and proximal sensing in assessing potential soil-spatial-related issues in newly established orchards as well as the impact soil spatial variability can have on tree development in the first years after planting.

Abstract Image

土壤空间变化对杏树幼苗的影响:重粘土案例研究
现代园艺的生存在很大程度上依赖于采用可持续的实践方法。了解重粘土的土壤空间变异性及其对幼树的影响,对于设计合适的水土管理策略以保证果园的可持续性至关重要。本研究的目的是评估新南威尔士州河岸平原重粘土果园中土壤空间变异性对杏仁(Prunus dulcis (Mill.) D. A. Webb)幼树生长的影响,并评估遥感和近距离传感工具的使用情况,以确定威胁作物可持续性的因素。在一个 8.3 公顷的灌溉区,利用土壤和航空勘测来评估土壤和作物的空间变异性。根据表观电导率(ECa)测量结果将灌溉区划分为五个区域,并采集了土壤样本。在 ECa 值对比强烈的两个区域监测树木生长、土壤和植物水分状况。第一年的研究发现,ECa 与地面树冠覆盖率之间存在显著的正相关关系。土壤分析和土壤水分监测结果表明,可交换钠百分比值高(表明土壤含钠量高、易流失)和水分渗透受限是导致低 ECa 地区树木生长量下降的原因。在第二个生长季,由于天气和水管理因素影响了土壤含水量,土壤空间变化对树木生长的影响有所减弱。这项研究展示了遥感和近距离传感在评估新建果园中潜在的土壤空间相关问题方面的实用性,以及土壤空间变异性在种植后最初几年对树木生长的影响。
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来源期刊
Agrosystems, Geosciences & Environment
Agrosystems, Geosciences & Environment Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
2.60
自引率
0.00%
发文量
80
审稿时长
24 weeks
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