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年以来一直在马尼托巴省经营一家定向刨花板工厂，使用当地的杨木原木制造建筑板材。该工厂焚烧木材、废弃树皮和锯末，用于烘干木板，然后运往当地和国际市场。这个过程产生的木灰是一种废物，目前部分材料被用于农田，其余的用卡车运到当地的垃圾填埋场。木灰是强碱性的，只有当土壤pH值为6.5或更低(马尼托巴省25%的农田)时，才适合作为农业补充剂。添加高碱度灰分会减少生长植物可利用的土壤养分，因此低密度植物对灰分作为土壤改良剂的季节性需求有限。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常规市场。

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.