Effects of foliar sprays on iron deficient jackfruit (Artocarpus integrus Merr.) growing in calcareous soils
2000
Grange, Ian | Kriesing Choodee
Calcareous soils commonly fix nutrients, including nutrient amendments, in a form unavailable to plants, resulting in deficiencies. Foliar fertilizer applications offer an alternative from of nutrient supply to plants. A trial was conducted to determine the effects of different Fe-foliar sprays, applied at 2 and 4-week intervals, on the growth of young jackfruit trees (Artocarpus integrus Merr.). The foliar sprays were Fe-sulphate, Fe-lignosulphonate and Fe-EDTA together with a control. The deficiency symptoms in trees for the control treatment increased for both application times. The Fe-sulphate treatment applied every 2-weeks reduced the deficiency symptoms significantly, but not completely, and increased the growth rate. This effect began to occur after about 6 weeks application of Fe-sulphate and no significant effect. For the Fe-EDTA and Fe-lignosulphonate treatments, the deficiency symptoms remained at the same initial level for both application times. These treatments may possibly have been effected by the high pH irrigation waters reducing their efficiency.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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