Maize silage contributes to biogas production in Lombardy Region (400 anaerobic digestion plants) employing 47,000 Ha (Production Model – PM1). Reducing the area devoted to this energy crop is a goal to free soil for food production. Double cropping (PM2) and Arundo donax L. (PM3) have been proposed and tested to measure the impacts for the three Production Models by Life Cycle Assessment (LCA).

The impact category related to Climate Change remained stable for PM2 while it decreased by 17% for Arundo donax L. (PM3) in comparison with PM1. Impact categories related to nutrient management (acidification, particulate matter eutrophication) showed an increase in the range of 3–5% for PM2 in comparison with PM1, while Arundo donax L. allowed the same impact categories to be reduced by 31%, 24%, 17% and 33%, respectively.

玉米青贮饲料利用47,000公顷（生产模式– PM1）促进了伦巴第地区（400个厌氧消化厂）的沼气生产。减少专用于这种能源作物的面积是释放土壤用于粮食生产的目标。已经提出并进行了两次种植（PM2）和Arundo donax L.（PM3）的测试，以通过生命周期评估（LCA）来衡量这三种生产模型的影响。

与PM1相比，与PM2有关的气候变化影响类别保持稳定，而Arundo donax L.（PM3）减少了17％。与营养管理相关的影响类别（酸化，颗粒物富营养化）显示，与PM1相比，PM2的影响范围增加了3–5％，而Arundo donax L.使相同的影响类别分别减少了31％，24％ ，分别为17％和33％。