Pedosphere 3(4): 341--347, 1993
ISSN 1002-0160/CN 32-1315/P
©1993 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Soil Micronutrients and Citrus Growth
Institute of Soil Science. Academia Sinica, P. O. Box 821, Nanjng 210008
      By using nutritional diagnosis of citrus leaves and determining soil micronutrients, the relationship between soil micronutrients and citrus growth in southern China has been studied.Studies showed that there was a significant positive correlation between available micronutrients (such as Zn, Mo, Cu) in the soil and the corresponding nutrients in citrus leaves. Thus, one can roughly learn of the sufficiency or deficiency of certain nutrients in soils by analyzing citrus leaves. Rational spray of Zn B or Mo fertilizer not only improved citrus yields but also increased the total sugar of Satsuma mandarin and of Xinhui orange by 2.9 and 17.2% respectively compared with the control. Spraying Mo fertilizer increased the vitamin C content of Satsuma mandarin juice by 4.7%-8.4%, maturated fruits 7-10 days earlier and gave the peel a brighter color.The ultramicroscopic characteristics of Zn-deficient citrus leaves were investigated under an electron microscope.
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Citation: Ouyang, T. 1993. Soil Micronutrients and Citrus Growth. Pedosphere. 3(4): 341-347.
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