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本文总结了广西桂北农场１９９１～１９９３年开展营养诊断指导柑桔施肥工作。通过营养诊断指导桔园施肥，使Ｎ素利用率由１９８８—１９９０年３年的１８．１１％提高至１９９１年、１９９３年２年的２５．９９％，吨果施Ｎ量由前３年的２２．０９ｋｇ，降至１８．２７ｋｇ；单产由前３年的１０８０．３ｋｇ／亩·年，提高至１７７３．７ｋｇ／亩·年。
This article summarizes Guangxi farm in 1991 ~ 1993 in Guangxi nutrition diagnosis and guidance of citrus fertilization. Through the nutrition diagnosis and guidance of orange orchard fertilization, the utilization rate of N increased from 18.11% in three years from 1988 to 1990 to 25.99% in two years in 1991 and 1993, 22.09kg, down to 18.27kg; yield increased from 1080.3kg / mu · the first three years to 1773.7kg / mu · year.