| 柑桔不同物候期叶片营养元素变化的研究 |
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| 引用本文： | 刘星辉,郑家基,赵玉钦,廖镜思.柑桔不同物候期叶片营养元素变化的研究[J].福建农林大学学报(自然科学版),1985(1). |
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| 作者姓名： | 刘星辉 郑家基 赵玉钦 廖镜思 |
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| 作者单位： | 福建农学院园艺系，福建农学院园艺系，福建农学院园艺系，福建农学院园艺系 |
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| 摘 要： | 柑桔叶片主要营养元素含量在年周期中是有波动的。南丰蜜桔、福桔、芦柑和雪柑四个柑桔品种的三个主要物候期叶片分析表明,氮素含量以花芽生理分化期(9～10月)最高,幼果期(5月)次之,花芽形态分化期(1月)最低。磷、钾素含量5月份最高,随着叶龄的增长而逐渐降低。叶片含钙量随着叶龄增长而增加,至9月份以后含量变化不明显。叶片含镁量以5月份新叶最低,后逐渐升高,9月份达到高峰,以后又逐渐降低。各物候期营养元素含量与产量相关性分析表明,花芽形态分化期叶片氮素营养与当年产量相关显著,而花芽生理分化期叶片氮素营养与翌年产量相关不显著。无论是1月份或是9月份叶片含镁量对当年产量均有显著或极显著的相关性。叶片含钾量与产量呈负相关。磷、钙等营养元素与产量相关不显著。
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A STUDY ON THE NUTRIENT ELEMENTS VARIATION OF CITRUS LEAVES IN THE DIFFERENT PHENOLOGICAL PERIODS |
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| Abstract: | Seasonal fluctuations of the major nutrient elements do exist in the citrus leaf contents.Our foliar analyses from four species of citrus,nam- ely,C.nobilis,C.sinensis,C.tangerina,and C.reticulata showed that there were three distinct phenological periods.The nitrogen contents ap- peared highest in the period of physiological flower bud differentiation, from Sept.to Oct..Next came to May as the period of young fruit deve- lopmental stage.The lowest in nitrogen contents was Jan.,the stage of flower bud morphological differentiation.As to phosphorus and potassium contents,the month of May showed the highest amount and de- creased with the development of citrus leaves.Conversely,the calcium contents increased with the age of the leaves but stopped increasing after the month of Sept..While magnesium contents appeared the lowest in May when new flushes developed.Then the amount of magnesium increased gra- dually and reached the peak in Sept..After that,the magnesium gradually decreased. The analyses of correlation between the contents of nutrient elements and the fruit yield in separate phenological periods showed that:morpho- logical floral bud differentiation stage had significant correlation between the leaf nitrogen contents and the fruit yield.As to the physiological ftoral bud differentiation stage,there was no significant correlation between the leaf nitrogen and the fruit yield of the next coming year.Leaf magnesium contents significantly or very significantly correlated with yield of the same year no matter the appearance happened in Jan.or as late as in the month of Sept..Leaf potassium contents were negatively correlated with fruit yields.The contents of phosphorus and calcium were not significant- ly correlated with fruit yields. |
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