Quantifying greenhouse gas emission reduction potential of a novel manure additive

全球农业占温室气体排放的12%，主要来自动物粪便储存和土壤施用以及肥料的使用。在全国范围内，粪肥和农田土壤的排放占加拿大农业每年5900万吨二氧化碳当量温室气体排放的一半以上。牲畜生产产生的粪便，如果在土地上施用适量，可以成为作物生产的重要资源，使关键养分循环并提供维持土壤健康的有机物。然而，目前世界上许多地方的粪便生产远远超过了当地的土地能力，并已成为一个主要的环境威胁。不列颠哥伦比亚省弗雷泽河谷下游地区是过度施用养分的一个重要例子，因为该地区动物生产密度大，而农业用地基数相对较小。人们研究了各种商业肥料添加剂对改变粪便成分、减少温室气体排放和气味的潜在作用，但结果并不一致。不列颠哥伦比亚大学的可持续农业景观实验室正在与Ocion Water Sciences合作，评估他们开发的一种新型肥料添加剂的效益。本项目将量化该产品在实验室条件下与乳禽粪便储存和土地利用结合使用时的温室气体减排潜力。该项目的结果将用于确定有意义的温室气体减排所需的施用量。

Globally agriculture accounts for 12% of greenhouse gas (GHG) emission largely from animal manure storage and soil application and the use of fertilizers. Nationally, emissions from manure and farmland soils makes up more than half of agriculture's 59 Mt carbon dioxide equivalents of annual GHG emission in Canada. Manure from livestock production, when land applied in appropriate amounts, can be an important resource for crop production, cycling key nutrients and providing organic matter to sustain soil health. Currently however, manure production, in many parts of the world far exceeds local land capacity, and has become a key environmental threat. The lower Fraser Valley region of British Columbia (BC) is an important example of nutrient over application because of its density of animal production and relatively small agricultural land base. Various commercial manure additives have been studied for their potential effect of changing manure composition and reducing GHG emission and odor but the results have been inconsistent. The Sustainable Agricultural Landscapes lab at University of British Columbia is collaborating with Ocion Water Sciences to evaluate the benefits of a novel manure additive they have developed. The project will quantify the GHG emission reduction potential of this product when used with dairy and poultry manure storage and land application under laboratory conditions. Results of this project will be used to identify the application rates required for meaningful GHG reduction.