Recent developments in diagnosis and management of nutrients constraints in acid lime

Acid lime is considered highly nutrient responsive crop. Occurrence of multiple nutrient deficiencies makes the redressal of such nutrient deficiencies all the more complex exercise. Site specific nutrient management studies find a greater weight age over conventional but classical progressive fertilization response studies, if constraint specific fertilization is to be worked out. Simultaneously use of integrated strategies viz., soil application of macronutrients (NPKS) and foliar application of micronutrients (Fe, Mn, Zn, B); and INM using rationale of organic manures fortified with microbial consortium based microbial reactor through isolation and characterization of native and dual purpose microbes and inorganic fertilizers have produced encouraging responses to improve production dividends underlying their undeniable utility. But, fertilizer requirement experiments have generated a vast variation in their recommendations depending upon orchard age, soil type and climatic features besides very limited information on micronutrients requirement. There is a still a bigger constraint in form of non-availability of reproducible nutrient diagnostics to determine frequency distribution of nutrient constraints duly verifiable at orchard level. Countrywide studies on development of nutrient diagnostics have suggested optimum range of nutrients based on leaf and soil analysis. For the optimum yield using DRIS (diagnosis and recommendation integrated system) based interpretation tool. Development of morphological descriptors and juice nutrient norms have further aided in defining the nutrient constraint more precisely. Such studies strongly warrant refining diagnostics at regional, and still finer at orchard level, so that once the correct diagnosis of nutrient constraint is made, management becomes a comparatively easier task.

کلیدواژه ها:

Acid lime ، ، Nutrient deficiencies ، Fertilization ، Micronutrients ، ، Isolation