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柑桔的几种缺素症及其防治措施建水县园艺站６５４３００王雪蓉一、缺氮：暂时性缺氮时，表现为叶色淡绿，如发生连续性缺氮，则表现为叶色黄而小，枝消弱而纤细，枝条生长受阻，外枝回缩，产量降低。防治措施是除增施有机质肥料外，春季用０．５％、夏秋季用０．３％的尿...
Several deficiencies of citrus and its prevention and control measures Jianshui Horticultural Station 654300 Wang Xuerong A, nitrogen deficiency: Temporary nitrogen deficiency, the performance of the leaf color light green, such as the occurrence of continuous nitrogen deficiency, the performance of the leaf color yellow The small, weak branches and slender, blocked growth branches, the outer branch retraction, reduce production. Control measures in addition to the addition of organic fertilizer, the spring with 0.5%, summer and autumn with 0.3% of urine ...