CONTROL OF EXCESSIVE FRUIT DROP AND IMPROVEMENT IN YIELD AND JUICE QUALITY OF KINNOW (CITRUS DELICIOSA X CITRUS NOBILIS) THROUGH NUTRIENT MANAGEMENT
CONTROL OF EXCESSIVE FRUIT DROP AND IMPROVEMENT IN YIELD AND JUICE QUALITY OF KINNOW (CITRUS DELICIOSA X CITRUS NOBILIS) THROUGH NUTRIENT MANAGEMENT
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通过营养管理控制 KINOW (CITRUS DELICIOSA X CITRUS NOBILIS) 过多落果并提高产量和果汁品质
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
G. Ebert
中科院分区：
文献类型：
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作者：
M. Ashraf;M. Yaqub;J. Akhtar;M. Khan;M. Khan;G. Ebert
巴基斯坦柑橘的产量和质量，特别是KINNOW（香橙x柑橘）与其他国家相比没有竞争力，这主要是由于柑橘园缺乏适当的营养管理。柑橘的产量损失主要是由于过度落果造成的。在巴基斯坦旁遮普的费萨拉巴德、托巴·泰克·辛格、张和萨戈达地区的四个不同地点进行了克服这些问题的试验。土壤和叶片的化学分析表明，严重缺乏锌在金诺。研究了叶面喷施锌、钾和水杨酸（SA）对苹果产量、落果率和果汁品质的影响。果树预处理与选定的NPK水平。在春梢期、果实形成期和果实着色期分别喷施锌（0.25%ZnSO_4溶液）、钾（0.25%K_2SO_4溶液）和水杨酸（10 μM）。总体而言，施用锌、钾和水杨酸或锌+钾+水杨酸对提高柑橘产量和品质参数是有效的。叶面喷施Zn、K、SA或Zn+K均能降低落果率，但喷施3次10μM SA +0.25%Zn、K的叶面喷施，可使落果率降低30%，并改善果汁品质。根据立地条件，合理施用营养素和激素，可有效提高金露果的产量和果汁品质。
Fruit yield and quality of citrus, especially KINNOW (Citrus deliciosa x Citrus nobilis) in Pakistan is not competitive with that of other countries which could be attributed mainly to the lack of appropriate nutrient management for citrus orchards. The yield losses in citrus occur mainly due to excessive fruit drop. Experiments to overcome these problems were conducted at four different sites one each in Faisalabad, Toba Tek Singh, Jhang and Sargodha districts of Punjab, Pakistan. The soil and leaf chemical analysis showed severe deficiency of Zn in Kinnow. In the present studies, effect of foliar application of Zn, K and salicylic acid (SA) alone or in combination was investigated on fruit yield, excessive fruit drop and juice quality. The fruit trees were pretreated with a selected NPK level. Zinc (0.25% ZnSO4 solution), K (0.25% K2SO4 solution) and salicylic acid (10 μM) were sprayed at three different stages, i.e. the onset of spring/flush of leaves or flowers, fruit formation and color initiation on fruit. Overall, application of Zn, K and SA or Zn+K+SA was effective in improving the yield and quality parameters of citrus fruit at all sites. Although fruit drop was reduced by the foliar spray of Zn, K, SA or Zn+K but three foliar sprays of 10μM SA + 0.25% each of Zn and K reduced the citrus fruit drop by 30% and also improved the juice quality. Kinnow fruit yield and juice quality can be effectively enhanced with proper nutrient and hormone applications depending on site conditions.