Système de diagnostic de l'acidité, de la qualité des amendements et de recommandation d'applications calcique (DAQARA) dans les sols agricoles

为了提高土壤生产力和酸性土壤的健康，钙改良剂通常用于提高肥力和pH(石灰材料)，而非石灰改良剂仅用于提高肥力。然而，现行的土壤酸度诊断系统(DA)、土壤改良剂质量诊断系统(QA)和土壤改良剂应用推荐系统(RA)却受到越来越多的批评。许多主要参与者(农民、工业、农学家和政策制定者)长期以来一直要求调整这三个组成部分：DA、QA和RA。我们的研究项目旨在建立一个新的DAQARA系统，确保在保护土壤生产力所需的石灰改良剂的需求和行业提供的钙改良剂的特点之间取得平衡，以便各种农业系统能够以充分和可持续的方式从该田间应用中受益。这个系统，DAQARA，将通过考虑材料类型、性质、成分、传播特性和特性(适量、选择正确的传播方法、频率和时刻)来改进石灰改良实践。该项目得到了三家跨国公司的支持：力拓、格雷蒙特和奥米亚加拿大公司，由于它们在世界各地的活动及其分销网络，它们将通过加入这一项目来提高加拿大专有技术的知名度。

To improve soil productivity and health of acidic soils, calcium amendments are often used to increase fertility and pH (liming materials), and non-liming amendments to increase fertility only. However, the actual system for soil diagnostic of acidity (DA), for the quality of amendments (QA), and that for the recommendation of amendments application (RA) is more and more criticized. Many key players (farmers, industrials, agronomists and policy makers) have, for a long time, asked for an adjustment of these three components: DA, QA, and RA. Our research project aims to build a new DAQARA system that guarantees a balance between the need for lime amendments adequate for the soil productivity protection, and the characteristics of the calcium amendments provided by the industry, so that various agricultural systems can benefit of that field application in an adequate and sustainable way. This system, DAQARA, will lead to improvements in the practices of lime amendment by taking into account material type, nature, composition, and spreading characteristics and specificities (adequate amount, choice of the right spreading application method, frequency and moment). This project is supported by three multinational corporations: Rio-Tinto, Graymont and Omya Canada who, because of their activities around the world and to their distribution network, will contribute by joining this project to increase the visibility of Canada know-how.