Potential use of DRIS for leaf nutrient diagnosis in Florida citrus

摘要

The Diagnosis and Recommendation Integrated System (DRIS) is an alternative method for the interpretation of mineral nutrient levels in plant tissues. DRIS was developed to overcome some of the limitations of traditional nutrient interpretation methods which rely on published leaf analysis standards. This article examines the weaknesses of traditional methods, how DRIS works, and how it could help Florida citrus growers to optimize their nutrient management programs. Leaf nutrient analysis is an important diagnostic tool for optimizing the mineral nutrition of citrus and other perennial crops. Soil sampling and analysis are less useful for diagnosing the nutrient requirements in perennial crops than in annual crops. Optimal nutrition will maximize fruit yield and quality while minimizing environmental impacts caused by inefficient utilization of nutrients.