我国柑橘园“因土补肥”与化肥减施增效生态分区

Ecological region division of soil based supplementary fertilization and decrement fertilization in China citrus orchards

土壤养分始终是柑橘树体养分最直接、最主要的来源,其含量高低直接决定着树体养分积累和储备,是树体营养的基础,土壤养分缺乏必然导致树体养分缺乏。本文研究了柑橘园叶片分析与土壤分析诊断养分丰缺的关系、我国柑橘园土壤及其肥力“缺乏”因子,明确了柑橘钙、镁、硼、锌缺乏与土壤酸化及磷、铁、锰、铜过量是我国柑橘园树体营养的突出问题,提出了叶片-土壤分析联合诊断柑橘园养分丰缺状况以及我国柑橘园“因土补肥”与化肥减施增效生态分区,为我国柑橘绿色低碳施肥和绿色高效生产提供参考依据。

Soil nutrients are always the most direct and main source of nutrients for citrus trees.The level of soil nutrient content directly determines the nutrient accumulation and storage of trees,which is the basis of tree nutrition.The lack of soil nutrients will inevitably lead to the lack of tree nutrients.This article summarizes the relationship between leaf analysis and soil analysis in citrus orchards to diagnose nutrient status,soil and its fertility"deficiency"factors in Chinese citrus orchards.It is defined that the deficiency of calcium,magnesium,boron and zinc in citrus,soil acidification and excess of phosphorus,iron,manga-nese and copper are the prominent problems of tree nutrition in Chinese citrus orchards.The joint diagnosis of nutrient status in citrus orchards by leaf-soil analysis,as well as the ecological region division of soil based supplementary fertilization and decrement fertilization in Chinese citrus orchards were proposed.It will be of great significance to guide the fertilization and production of citrus with low-carbon and green and high efficiency in China.