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首页> 外文学位 >Chemical, physical, and moisture release characteristics of compost based potting media.
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Chemical, physical, and moisture release characteristics of compost based potting media.

机译：基于堆肥的灌封介质的化学，物理和水分释放特性。

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摘要

A commercially available composted cow manure was used as a potting media amendment. A common base mix for woody ornamentals of 8 parts pine bark and 1 part sand was compared with 3 other mixes that contained 20%, 30%, and 40% compost (v/v). The remaining fraction of these three mixes was the base mix (bark and sand). Samples of the pine bark and compost were analyzed to determine the following plant nutrients and mineral concentrations: nitrogen (organic and soluble), carbon, P2O5, K2O, Ca, S, Mg, Mn, Cu, Zn, Na, Fe, and Al. The chemical characteristics of the three compost-based potting media mixes were calculated on a mass basis. The aeration porosity, total porosity, volumetric water holding capacity and bulk density of the four mixes were measured using a chamber that was constructed to facilitate measurement of the physical properties of potting media. The results indicated that increasing the percentage of compost in potting media caused the desired decrease in aeration porosity, and total porosity. The data of moisture release curve was obtained using the pressure plate and dew point methods. The results indicated that the 20% compost potting media mix had the lowest refill point, the 30% compost potting media mix could hold most water at the wilting point, and the 40% compost potting media mix had the largest range of readily available water. Including compost in potting media created a substantial increase in valuable plant nutrients and minerals. It was concluded that adding 20% to 30% compost to a screened bark base mix would provide the majority of the improvements in fertilizer value, physical properties, and mass of water in a container for a growing plant.
机译：使用市售的堆肥牛粪作为盆栽培养基改良剂。比较了木质装饰物的普通基础混合物（8份松树皮和1份沙子）与其他3种包含20％，30％和40％堆肥（v / v）的混合物。这三种混合物的其余部分是基础混合物（树皮和沙子）。分析了松树皮和堆肥样品，以确定以下植物养分和矿物质浓度：氮（有机和可溶性），碳，P2O5，K2O，Ca，S，Mg，Mn，Cu，Zn，Na，Fe和Al 。以质量为基础计算了三种基于堆肥的灌封培养基混合物的化学特性。使用腔室测量四种混合物的通气孔隙率，总孔隙率，持水量和堆积密度，该腔室的结构便于测量灌封介质的物理性能。结果表明，增加堆肥在堆肥介质中的百分比会导致所需的通气孔隙率和总孔隙率降低。水分释放曲线的数据是使用压板和露点法获得的。结果表明，20％堆肥盆栽混合料的补水点最低，30％堆肥盆栽混合料可以将大部分水保持在枯萎点，40％堆肥盆栽混合料的可用水范围最大。将堆肥包括在盆栽培养基中可大大增加宝贵的植物营养和矿物质。得出的结论是，向经过筛选的树皮基料混合物中添加20％至30％的堆肥将为生长植物的容器提供肥料价值，物理特性和水量方面的大部分改善。

著录项

  • 作者

    Wang, Tianzhen.;

  • 作者单位

    Clemson University.;

  • 授予单位 Clemson University.;
  • 学科 Environmental engineering.
  • 学位 M.S.
  • 年度 2013
  • 页码 79 p.
  • 总页数 79
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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