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A Study of Mineral Deficiency Symptoms of Indian jujube
D. J. Yeh
|關鍵字:||症狀;Symptom;營養失調;印度棗;Mineral Deficiency;Indian jujube||Project:||興大園藝, Volume 12, Page(s) 39-48.
Horticulture NCHU, Volume 12, Page(s) 39-48.
Indian jujube is one of the important tropical fruits in Taiwan. The extreme rapidity in the growth rate of the tree usually result in nutrient deficiency. In this experiment, water culture was employed to induce the individual symptoms of 7 elements. Photographs were taken, characteristics recorded in order to provide the fruit grower with a simple and effective method of diagnosis of nutrient disorder, and thus the improvement of the orchard management. Result are as follows:
1. Nitrogen deficiency: Plant growth retarded, chlorosis of the lower leaves.
2. Potassium deficiency: Plant affected produces a stiff, upright growth pattern. Other symptoms include reduced growth rate of the side brances, small leaf area and relatively dark green leaves.
3. Potassium deficiency: Chlorosis of the margin of the lower leaves, extended into the areas between main leaf veins. Necrosis of leaf margin in severe cases.
4. Calcium deficiency: Browning of buds. Wilting of shoot tip; new leave twisted and dry, leaves fall in the sever case.
5. Magnisum deficiency: symptom first appeares in the areas betwween the veins of more mature leaves. Necrosis observed in the severe case.
6. Iron deficiency: Yellowing of the new leaves on shoot tip. The distribution of yellow color is rather even.
7. Boron deficiency: Plant growth arested. Stem shorten and expanded. Wilting of shoot tip at a later growth stage and finally leaf falls.
|Appears in Collections:||第12期|
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