Paper Information

Journal:   IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES   2001 , Volume 15 , Number 2; Page(s) 0 To 0.
 
Paper: 

EFFECTS OF THE TYPE AND APPLICATION METHOD OF FERTILIZERS ON PREVENTING FRUIT DROPS IN ALMOND VAR. MAMAEI (PART 1)

 
 
Author(s):  KIANI SH., MALAKOUTI M.J.
 
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Abstract: 
Chahar Mahal Va Bakhtiari province with 3992 hectares of almond orchards is in the sixth position among other almond producing provinces of Iran. However, severe fruit drop, which reduces the total yield, is the major problem of almond production in this province.
This experiment was conducted in order to determine the effects of balanced nutrition on the prevention of almond fruit drop and increasing the yield of 10-year old almond cv. "Mamaei" during 1999-2000, in the Emamieh commercial orchard in Shahre Kord, Iran. Six treatments were arranged in a randomized block design with four replications. Treatments were: T1 - Fertilizer application based on the farmers` conventional method (control); T2 - Localized placement of chemical and organic fertilizer based on Soil and Water Research Institute (SWRI)
recommendation; T3 - T2 + foliar application of urea, boric acid and zinc sulfate in the autumn; T4 - T3 + foliar application of urea, boric acid and zinc sulfate in the spring; T5 - T2 + two additional spray of a liquid complete fertilizer and T6 was T2 + foliar application of urea, boric acid and zinc sulfate in the autumn and spring + two additional spray of liquid complete fertilizer.
The results revealed that there was a significant difference( at 5% level )between the percentage of final almond fruit formation from the treatments of localized placement of chemical and organic fertilizer compared with the control. At the early growing season, there was no difference in the percentage of initial fruit set among the treatments. However, the highest and lowest final fruit set were observed in the treatments T5 and T1 with 24 and 12 percent, respectively. Fruit drop in 30-days after full bloom was not affected by different treatments except in T3, although fruit drop in 45-days after full bloom decreased significantly (at 5% level) in localized placement of chemical and organic fertilizer treatments when compared with the control. Results demonstrated increase in the yield from 2.260 in the control to 5.860 kg/tree in the localized placement of chemical and organic fertilizer treatments.
 
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