Evaluating wood ash for phosphorus removal from livestock manure

路易斯安那太平洋公司（LP）是一家建筑产品公司，自1996年以来，该公司在曼尼托巴省经营了一家定向刨花板工厂，使用当地的杨木原木制作建筑板材。在运往当地和国际市场之前，该工厂会燃烧木材、废树皮和锯末来烘干纸板。从这个过程中产生的木灰是一种废物，目前一部分材料用于农田，其余的材料用卡车运到当地的垃圾填埋场。木灰呈强碱性，仅在土壤pH值为6.5或更低时（<马尼托巴省农田的25%）才适合作为农业补剂。添加高碱性灰分会减少土壤养分对生长植物的可用性，因此LP植物对灰分作为土壤改进剂的需求有限且季节性。从养分可持续性和废物利用的角度来看，LP希望为其稳定的木灰供应找到一个固定的市场。

Louisiana Pacific (LP) is a building products company that has operated an oriented strand board plant in Manitoba since 1996 using local poplar logs to make construction sheeting. The plant burns wood, waste bark and sawdust for drying the board before shipping to local and international markets. Wood ash produced from this process is a waste product and currently a portion of the material is applied to farmland with the rest trucked to the local landfill. Wood ash is strongly alkaline, and as an agricultural supplement it is only appropriate when soil pH is 6.5 or lower (<25% of Manitoba farmland). Addition of a highly alklaine ash makes soil nutrients less available to growing plants, thus the LP plant has limited and seasonal demand for ash as a soil amendment. From a perspective of nutrient sustainability and waste utilization, LP would like to find a regular market for its steady supply of wood ash.