Research Institute of Forests and Rangelands, Tehran, Iran

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Jahanian Amin; TABATABAEI SEYED JALAL; NAJAFI NOSRATOLLAH

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Journal: HORTICULTURAL PLANT NUTRITION Year:2018 | Volume:1 | Issue:1 Page(s): 41-48

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Title

Research Institute of Forests and Rangelands, Tehran, Iran

Author(s)

Jahanian Amin | TABATABAEI SEYED JALAL | NAJAFI NOSRATOLLAH | Issue Writer Certificate

Keywords

Broccoli

Phosphite

Phosphate

Abstract

Introduction: Phosphorus (P) is an important nutrient for the plant affecting many physiological functions in plants. Phosphite (PO33; Phi; valence of +3), a reduced form of Phosphate (PO43; Pi; valence of +5), that are being widely marketed either as an agricultural fungicide or as a superior source of plant phosphorus (P) nutrition. Furthermore, pH of both nutrient and soil solution alter the availability of P by the plants. There is insufficient information concerning the use of Phosphite in plant. It could be possible to use of Phosphite and Phosphate to improve the P nutrition of plants. Materials and Methods: An experiment was conducted to investigate the effect of Phosphite and Phosphate in different pH on yield, growth and P status in Broccoli (Brassica oleracea var. italicacv. Fiorentino). The experiment was conducted with three pH levels (5. 5, 7, 8. 5) factorially combined with three P source levels (Pi, Phi and Pi& Phi). The plants were grown in black buckets containing 8 L of aerated nutrient solution for 10 weeks. At the end of experiments the plant were harvested to measure the agronomical and physiological characteristics. The concentration of P was measured in the recently matured expanded leaves. Results and Discussion: Results indicated that the growth of Broccoli plants was affected by the form of P. Phosphite significantly reduced the yield of plant. In Phosphite treated plants immature heads (button-like flower heads) was observed. Likewise, Phosphite increased phosphorus and potassium concentration in the leaves, roots, Stems and heads. Both P and K concentration were significantly reduced by the increase pH level. The highest yield was observed in Pi& Phi with pH (5. 5) at 237 g plant-1. Phosphate (pH=5. 5) compare to Phosphite (pH=5. 5) increased by 75% in yield. The increase in Pi uptake in the Phi treatment plant caused increased in P concentration in leaves and growth reduction and phytotoxicity. The negative effects application of only Phosphite was strong inhibiting effect in fresh weight head. Despit of increased P concentration in Phosphite treated plant, it seems that P from Phosphite source has no effect on P functional in plants. Conclusion: The findings this experiment indicted that Phosphite alone could not be used as a phosphorus fertilizer for the plants. however, the combination of Phosphite and Phosphate improves the growth of Broccoli plants.

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APA: Copy

Jahanian, Amin, TABATABAEI, SEYED JALAL, & NAJAFI, NOSRATOLLAH. (2018). Research Institute of Forests and Rangelands, Tehran, Iran. HORTICULTURAL PLANT NUTRITION, 1(1 ), 41-48. SID. https://sid.ir/paper/268536/en

Vancouver: Copy

Jahanian Amin, TABATABAEI SEYED JALAL, NAJAFI NOSRATOLLAH. Research Institute of Forests and Rangelands, Tehran, Iran. HORTICULTURAL PLANT NUTRITION[Internet]. 2018;1(1 ):41-48. Available from: https://sid.ir/paper/268536/en

IEEE: Copy

Amin Jahanian, SEYED JALAL TABATABAEI, and NOSRATOLLAH NAJAFI, “Research Institute of Forests and Rangelands, Tehran, Iran,” HORTICULTURAL PLANT NUTRITION, vol. 1, no. 1 , pp. 41–48, 2018, [Online]. Available: https://sid.ir/paper/268536/en

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