The Effect of Macronutrient Availability on Pomegranate Reproductive Development

Area of Science:

• Horticulture
• Plant Physiology
• Agricultural Science

Background:

• Pomegranate cultivation has seen significant expansion globally.
• Fertilization requirements, especially macronutrient impacts on reproductive development, are not well-documented.

Purpose of the Study:

• To investigate the effects of nitrogen (N), phosphorus (P), and potassium (K) fertigation on pomegranate reproductive development.
• To determine the influence of macronutrient availability on andromonoecy, fruit set, and aril number.

Main Methods:

• Two pomegranate cultivars ('Wonderful', 'Emek') were grown in containers with varying N, P, and K levels via fertigation over three years.
• Development and reproduction indices were systematically measured.

Main Results:

• Elevated N and P levels increased the proportion of hermaphroditic flowers in the first year.
• Phosphorus (P) positively influenced the total number of hermaphrodites per tree.
• Nitrogen (N) concentration positively affected fruit set and aril number.

Conclusions:

• Severe deficiencies in N and P impact pomegranate andromonoecy.
• Potassium (K) had negligible effects on pomegranate reproduction within the tested levels.