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Recent trends in soil fertility across the farms of East Gippsland
Soil Research ( IF 1.6 ) Pub Date : 2020-01-01 , DOI: 10.1071/sr19246
D. M. Crawford , B. Mitchard , W. R. Burton

Current data are needed to manage our soil resources but there are few recent purpose-built surveys of soil fertility, a critical asset for natural resources management. Instead, data collected for other purposes are re-used as has been the case in our area of interest here: managing the threat of soil erosion on farm land in East Gippsland. The dynamic nature of soil fertility challenges this approach, so we conducted a new survey using 234 paddocks selected at random. These new data were compared to re-purposed legacy data. Plant tissue samples from a selected subset were used to assess micronutrients. Separately, 27 paddocks that had been sampled during 1975–89 were re-tested to examine temporal changes. We concluded that many paddocks are now strongly or very strongly acidic and deficient in molybdenum (Mo) and boron (B). More specifically, those under dairying, cropping and horticulture are likely to have adequate phosphorus (P) while those grazed for meat and wool are likely to be deficient in P. We concluded that grazing enterprises need to either re-adopt soil testing and fertiliser treatment or adopt management practices suitable for acid soils deficient in P, Mo and B, if their paddocks are to support sustainable productive agriculture. Data from the re-tested paddocks suggest that, in general, many were once less acidic, highlighting the difficulties in using legacy data. Also, contrasts in soil pH and available P between paddocks under different management regimes, highlighted the difficulties in using re-purposed data. We concluded that a statistically designed survey is a preferable basis for natural resource management.

中文翻译:

东吉普斯兰农场土壤肥力的最新趋势

管理我们的土壤资源需要当前的数据,但最近很少有专门针对土壤肥力进行的调查,土壤肥力是自然资源管理的重要资产。相反,为其他目的收集的数据被重新使用,就像我们感兴趣的领域一样:管理东吉普斯兰农田土壤侵蚀的威胁。土壤肥力的动态性质对这种方法提出了挑战,因此我们使用随机选择的 234 个围场进行了一项新调查。这些新数据与重新利用的旧数据进行了比较。来自选定子集的植物组织样本用于评估微量营养素。另外,对 1975-89 年采样的 27 个围场进行了重新测试,以检查时间变化。我们得出的结论是,许多围场现在呈强酸性或极强酸性,并且缺乏钼 (Mo) 和硼 (B)。进一步来说,奶业、种植业和园艺业的磷(P)可能充足,而肉食和羊毛的放牧可能缺乏磷。 我们得出结论,放牧企业要么重新进行测土配方施肥,要么采取管理措施。适用于缺乏 P、Mo 和 B 的酸性土壤的做法,如果他们的围场要支持可持续的生产性农业。来自重新测试的围场的数据表明,一般来说,许多围场的酸性较低,这突显了使用旧数据的困难。此外,不同管理制度下围场之间土壤 pH 值和有效磷的对比,突出了使用重新利用数据的困难。我们得出的结论是,统计设计的调查是自然资源管理的首选基础。种植业和园艺业可能有足够的磷(P),而放牧的肉类和羊毛可能缺乏磷。 我们得出的结论是,放牧企业需要重新采用测土配方施肥或采用适合酸的管理措施缺乏 P、Mo 和 B 的土壤,如果他们的围场要支持可持续的生产性农业。来自重新测试的围场的数据表明,一般来说,许多围场的酸性较低,这突显了使用旧数据的困难。此外,不同管理制度下围场之间土壤 pH 值和有效磷的对比,突出了使用重新利用数据的困难。我们得出的结论是,统计设计的调查是自然资源管理的首选基础。种植业和园艺业可能有足够的磷(P),而放牧的肉类和羊毛可能缺乏磷。 我们得出的结论是,放牧企业需要重新采用测土配方施肥或采用适合酸的管理措施缺乏 P、Mo 和 B 的土壤,如果他们的围场要支持可持续的生产性农业。来自重新测试的围场的数据表明,一般来说,许多围场的酸性较低,这突显了使用旧数据的困难。此外,不同管理制度下围场之间土壤 pH 值和有效磷的对比,突出了使用重新利用数据的困难。我们得出的结论是,统计设计的调查是自然资源管理的首选基础。
更新日期:2020-01-01
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