Effect of zinc, iron and manganese on yield and yield components of green beans

Peyman Sharifi, Mohammad Paymozd

Abstract


Micronutrients are just as important in plant nutrition as macronutrients. This experiment was conducted in field of Shaft, Guilan province, Iran, during 2013-14 growing season. The experimental treatments were arranged on a randomized complete block design (RCBD) with three replications. Ten treatments including control and combinations of 50 kg ha-1 Fe SO4, 40 kg ha-1 Zn SO4 and 40 kg ha-1 Mn SO4. Analysis of variance indicated that the effect of fertilizer treatments was significant on plant height, pod length, number of pods per plant, pod yield, biological yield and harvest index. The maximum values of plant height, pod length, pod yield and biological yield were 45 cm, 13.73 cm, 5543.33 kg ha-1 and 5950 kg ha-1, respectively, when plants untreated with any micronutrients (control). The maximum values of number of pods per plant (21) were obtained when plants received 50 kg ha-1 Fe SO4 + 40 50 kg ha-1 Zn SO4. The minimum values of pod yield (470 kg ha-1) and biological yield (560 kg ha-1) were obtained in tenth treatment (50 kg ha-1 Fe SO4 + 40 kg ha-1 Zn SO4 + 40 kg ha-1 Mn SO4 + one foliar application at the rate of 0.6 % before flowering). The results indicated toxicity effects of micronutrients in the present study condition on common bean yield and yield components. It could be concluded that under the conditions of the present experiment, it is not recommended to use of micronutrient fertilizers.


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