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Response of anna apple trees to number and time of boron and zinc foliar application [electronic resource].

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Marzouk, H. A

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Language: English Summary language: Arabic Description: p.715-733Other title:

أستجابة أشجار التفاح صنف أنا الى عدد وقت الرشات الورقية بالزنك والبورون [Added title page title]

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Journal of the advances in agricultural researches, 2003 v. 8 (4) [electronic resource].

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In: Journal of the Advances in Agricultural Researches 2003.v.8(4)Summary: The present study was conducted in the growing seasons 2000-2001 and 2001-2002. Anna apple trees were sprayed at different dates and number with borax at concentration of 200 ppm and zinc sulphate at concentration of 0.3% separate or in combinations with each other Spraying dates were as follow: after harvest (at the end of September of 2000 and 2001), before full bloom and at full bloom of both seasons. The effect on tree growth, leaf mineral contents, fruit set, yield , fruit quality and storability were investigated, Spraying boron alone once (AH or BFB) or spraying zinc alone twice (AH + BFB) or (AH + AFB) and three times (AH, BFB and AFB) had a great effect on fruit set. yield and fruit quality and storability. However, leaf N, K and Fe was not affected by any of the B and Zn sprays. Moreover, a great effect of the combined Zn and B sprays were obtained. In general, the double and triple sprays of zinc with one boron spray AH or BFB were the most effective treatments on tree growth, fruit set, fruit retention, yield, fruit quality and storability.

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The present study was conducted in the growing seasons 2000-2001 and 2001-2002. Anna apple trees were sprayed at different dates and number with borax at concentration of 200 ppm and zinc sulphate at concentration of 0.3% separate or in combinations with each other Spraying dates were as follow: after harvest (at the end of September of 2000 and 2001), before full bloom and at full bloom of both seasons. The effect on tree growth, leaf mineral contents, fruit set, yield , fruit quality and storability were investigated, Spraying boron alone once (AH or BFB) or spraying zinc alone twice (AH + BFB) or (AH + AFB) and three times (AH, BFB and AFB) had a great effect on fruit set. yield and fruit quality and storability. However, leaf N, K and Fe was not affected by any of the B and Zn sprays. Moreover, a great effect of the combined Zn and B sprays were obtained. In general, the double and triple sprays of zinc with one boron spray AH or BFB were the most effective treatments on tree growth, fruit set, fruit retention, yield, fruit quality and storability.

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