Sampling Size Required for Determining Soil Carbon and Nitrogen Properties at Early Establishment of Second Rotation Hoop Pine Plantations in Subtropical Australia

首页> 外文期刊>土壤圈（英文版） >Sampling Size Required for Determining Soil Carbon and Nitrogen Properties at Early Establishment of Second Rotation Hoop Pine Plantations in Subtropical Australia

【24h】

Sampling Size Required for Determining Soil Carbon and Nitrogen Properties at Early Establishment of Second Rotation Hoop Pine Plantations in Subtropical Australia

机译：亚热带澳大利亚第二个旋转箍松人工林的早期建立中确定土壤碳和氮属性所需的采样大小

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

页面导航

摘要
著录项
相关主题

摘要

Investigations into forest soils face the problem of the high level of spatial variability that is an inherent property of all forest soils. In order to investigate the effect of changes in residue management practices on soil properties in hoop pine (Araucaria cunninghamii Aiton ex A. Cunn.) plantations of subtropical Australia it was important to understand the intensity of sampling effort required to overcome the spatial variability induced by those changes. Harvest residues were formed into windrows to prevent nitrogen (N) losses through volatilisation and erosion that had previously occurred as a result of pile and burn operations. We selected second rotation (2R) hoop pine sites where the windrows (10-15 m apart) had been formed 1, 2 and 3 years prior to sampling in order to examine the spatial variability in soil carbon (C)and N and in potential mineralisable N (PMN) in the areas beneath and between (inter-) the windrows. We examined the implications of soil variability on the number of samples required to detect differences in means for specific soil properties,at different ages and at specified levels of accuracy. Sample size needed to accurately reflect differences between means was not affected by the position where the samples were taken relative to the windrows but differed according to the parameter to be sampled. The relative soil sampling size required for detecting differences between means of a soil property in the inter-windrow and beneath-windrow positions was highly dependent on the soil property assessed and the acceptable relative sampling error. An alternative strategy for soil sampling should be considered, if the estimated sample size exceeds 50 replications. The possible solution to this problem is collection of composite soil samples allowing a substantial reduction in the number of samples required for chemical analysis without loss in the precision of the mean estimates for a particular soil property.

机译：对森林土壤的调查面临着高度空间变异性的问题，而空间变异性是所有森林土壤固有的特性。为了调查残留管理措施的变化对亚热带澳大利亚的环松（Araucaria cunninghamii Aiton ex。A. Cunn。）人工林土壤特性的影响，重要的是要了解克服由空间变化引起的空间变化所需的抽样工作强度这些变化。收获的残留物会形成成堆成堆的草料，以防止氮和氮通过挥发和侵蚀而损失，而氮的挥发是以前由于堆放和焚烧操作而发生的。我们选择了第二个旋转（2R）箍松林地，在采样之前的1年，2年和3年形成了成排的稻草（相距10-15 m），以便研究土壤碳（C）和氮以及潜力的空间变异性。在草料堆下方（之间）之间的区域中的可矿化氮（PMN）。我们研究了土壤变异性对在特定年龄，特定精度水平下检测特定土壤特性均值差异所需样品数量的影响。准确反映均值之间差异所需的样本大小不受样本相对于行的位置的影响，但根据要采样的参数而有所不同。检测中间行和下层行的土壤性质的平均值之间的差异所需的相对土壤取样大小高度取决于所评估的土壤性质和可接受的相对取样误差。如果估计的样本量超过50次重复，则应考虑采用另一种土壤采样策略。该问题的可能解决方案是收集复合土壤样品，从而大大减少化学分析所需的样品数量，而不会损失特定土壤性质的平均估算精度。

著录项

来源
《土壤圈（英文版）》 |2007年第6期|706-711|共6页
作者

展开▼
作者单位

Centre for Forestry and Horticultural Research, Nathan Campus, Griffith University, 170 Kessels Road, Nathan, Queensland 4111 Australia;

Faculty of Science, Griffith University, Nathan Campus, Griffith University, 170 Kessels Road, Nathan, Queensland 4111 Australia;

Centre for Forestry and Horticultural Research, Nathan Campus, Griffith University, 170 Kessels Road, Nathan, Queensland 4111 Australia;

Faculty of Science, Griffith University, Nathan Campus, Griffith University, 170 Kessels Road, Nathan, Queensland 4111 Australia;

Centre for Forestry and Horticultural Research, Nathan Campus, Griffith University, 170 Kessels Road, Nathan, Queensland 4111 Australia;

Faculty of Science, Griffith University, Nathan Campus, Griffith University, 170 Kessels Road, Nathan, Queensland 4111 Australia;

展开▼
收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
hoop pine, nitrogen, potential mineralisable nitrogen, residue management, soil spatial variability;

机译：箍松;氮;潜在可矿化氮;残留物管理;土壤空间变异性;

Sampling Size Required for Determining Soil Carbon and Nitrogen Properties at Early Establishment of Second Rotation Hoop Pine Plantations in Subtropical Australia

摘要

著录项

相关主题

期刊订阅