Accurate prediction of soil moisture for optimal timing of fertilizer and irrigation

准确预测土壤湿度，以优化施肥和灌溉时机

• 批准号: 492561-2015
• 负责人: Woodbury, Allan
• 金额: $ 1.82万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=587237
• 关键词: Accurate; prediction; soil; moisture; optimal

Optimal timing of fertilizer and irrigation, and defining their application rates are keys for crop growth and have a direct impact on crop yield. Timing, as well as application rate, depends on the soil moisture content. Thus, accurate prediction of soil moisture at seeding times and during the crop growth season is critical for Canadian farmers. Standard methods for prediction do not include actual weather behavior but rely on vegetation data from previous years. This method helps in the classification of yield potential zones but, unfortunately, cannot be used to predict soil moisture levels at seeding or during the crop growth period. In this proposed research, our main objective is to estimate the soil moisture based on actual weather forecasts and to convert the information to the size of an agricultural plot. To do this, we will develop a method that takes water flow and nutrient transport processes in the soil into account. In a second step, the result will be transferred to an agricultural plot. Thus, the soil moisture content will be available for the whole field and for the time of the available weather forecast. Farmers will be able to get information about the optimal timing of fertilizer and irrigation and on optimal application rates of fertilizer. This will reduce fertile costs and increase the crop yield.

施肥和灌溉的最佳时机及其施用量的确定是作物生长的关键，直接影响作物产量。时间和施用量取决于土壤含水量。因此，准确预测播种时间和作物生长季节的土壤湿度对加拿大农民至关重要。预测的标准方法不包括实际天气行为，而是依靠往年的植被数据。这种方法有助于产量潜力区的分类，但不幸的是，不能用于预测播种或作物生长期的土壤湿度水平。