| 郭秀明，樊景超，周国民.苹果园中土壤水分空间分布特性初探[J].广东农业科学,2014,41(24):68-71 |
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苹果园中土壤水分空间分布特性初探 |
| Preliminary study on distribution characteristicsof soil moisture in apple orchard |
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| DOI： |
| 中文关键词: 土壤水分 分布 无线传感器 部署 |
| 英文关键词: soil moisture distribution wireless sensor networks (WSN) |
| 基金项目:院国家“863”计划项目（013AA102405） |
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| 摘要点击次数: 1436 |
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| 中文摘要: |
| 无线传感器（WSN）能通过互联网感知客体环境信息，已经广泛应用于农业生产环境监测。将WSN 应用
在苹果园中，监测果园环境信息，为苹果生产提供决策支持。土壤水分是影响苹果品质和产量的重要因素之一。研究
果园中土壤体积含水量的分布规律能为WSN 在果园应用中土壤水分传感器部署策略提供支持。在北京一个普通的
苹果园进行实地试验，采用土壤水分测量仪测量3 个典型子区域不同土壤深度及不同水平位置多个点的土壤体积
含水量，结果表明院总体上在果树周围土壤体积含水量随着树根距离的增加而增加曰计算了3 个典型子区域及整个
果园3 个土壤深度的均方差，91.7%的均方差均为2%~3%，在各个子区域及整个果园，土壤水分具有相似的分散程
度曰计算了每个子区域每个测量点的土壤水分均方差。1%~2%之间的均方根误差所占比例最大，为48.2%。当土壤深
度小于300 mm 时，水平层面的均方差大于垂直方向。根据试验结果，提出了一种“以单棵树为目标，着眼于整个果
园”的土壤水分传感器部署方法。 |
| 英文摘要: |
| Wireless sensor networks (WSN) can be used to sense the objectivity environmental information, and have
been applied in agriculture widely. When WSN are applied in apple orchards, the environmental information can be
monitored, then the right decisions can be made. Soil moisture is one of the most important factors that can affect apples爷
quality and yield. Research on the distribution characteristics of soil moisture in apple orchard can provide support for
WSN node deployment. Field tests were performed in a common apple orchard in Beijing, and the soil moisture at lots of
points at different soil depths in three typical sub-zones was measured. The results showed that the soil moisture content
increased with the increased distance to the root, mean square errors in three soil depths were computed in the three subzones
and in the whole orchard, and 91.7% of them were between 2% and 3%. So, the soil moisture had similar dispersion
degree at each sub-zone or at the whole orchard. The mean square errors of the soil moisture at different positions in each
sub-zone were computed, the values between 1% and 2% accounted for the largest proportion being 48.2%. The mean
square errors in the horizontal direction were bigger than that in the vertical direction on the whole. A soil moisture sensor
deployment strategy targeting one apple tree and focusing on the whole orchard冶was proposed based on the results. |
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