Evaluating Mineral and Bio Phosphorus Fertilization on Orange Tree Productivity

Jenn Hoskins
15th November, 2024

Evaluating Mineral and Bio Phosphorus Fertilization on Orange Tree Productivity

Applying a combination of mineral and bio-phosphorus fertilizers significantly boosted the levels of essential macronutrients nitrogen, phosphorus, and potassium in the leaves of Valencia orange (Citrus sinensis) trees, underpinning the overall improvements in fruit yield and quality observed in the study.

Image adapted from: Elazazi et al. / CC BY (Source)

Key Findings

  • The study by Zagazig University evaluated the effects of different phosphorus fertilization treatments on Valencia orange trees
  • The combination of 50% Triple Phosphate (TP) and 50% Phosphate Rock (PR), supplemented with bio-phosphorus fertilizer phosphorin, resulted in the highest productivity and fruit quality
  • This treatment led to increased nutrient content in leaves, higher fruit yield, better juice quality, and improved vitamin C content
Phosphorus (P) is a crucial element in crop production, playing a significant role in plant growth and fruit quality. A recent study conducted by Zagazig University[1] aimed to evaluate the effects of different phosphorus fertilization treatments on the productivity and quality of Valencia orange trees (Citrus sinensis L. Osbeck). This study is particularly relevant as it explores both chemical and bio-phosphorus sources, emphasizing their impact on various quality parameters of orange trees. The study investigated three treatments of phosphorus fertilization: Triple phosphate (TP), phosphate rock (PR), and a combination of TP and PR in a 1:1 ratio. Each treatment was further supplemented with a bio-phosphorus fertilizer called phosphorin, applied at two different rates. The researchers measured various parameters, including the nitrogen (N), phosphorus (P), and potassium (K) content in leaves, the number of fruits, juice weight and volume, total soluble solids (T.S.S.), vitamin C (V.C), and acidity. The findings revealed that the treatment combining 50% TP and 50% PR, supplemented with phosphorin, resulted in the highest values across all measured parameters. For instance, the N content in tree leaves reached 2.61% and 2.69%, P content was 0.16% and 0.17%, and K content was 1.79% and 1.86% over the two seasons. Additionally, the number of fruits per tree, fruit weight, juice weight, and juice volume were significantly higher in this treatment compared to others. The T.S.S./Acid ratio and vitamin C content also showed notable improvements, indicating better fruit quality. These results align with previous studies that have highlighted the importance of phosphorus in enhancing fruit quality. For example, a study on Cara Cara navel oranges demonstrated that phosphorus fertilizer improved fruit quality by increasing soluble sugars and decreasing citric acid accumulations[2]. This was achieved through the regulation of sucrose metabolism and the inhibition of citric acid synthesis, which are crucial for the sensory characteristics of citrus fruits. Furthermore, the study's findings on the combined use of chemical and bio-phosphorus fertilizers are supported by earlier research on nutrient interactions in plants. Phosphorus, along with other essential nutrients like nitrogen and potassium, plays a vital role in plant growth and productivity. The interaction between these nutrients can significantly impact their availability and utilization by plants[3]. The use of bio-fertilizers, such as phosphorin, can enhance the bioavailability of phosphorus, leading to improved nutrient uptake and better crop performance. The study also builds on previous research that investigated the role of mobile colloids in phosphorus binding and transport in soils. Nano and fine colloids have been shown to contribute significantly to phosphorus lability and bioavailability in soils amended with organic fertilizers[4]. These findings suggest that the use of bio-phosphorus fertilizers can enhance the mobility and availability of phosphorus in the soil, thereby improving its uptake by plants. In conclusion, the study conducted by Zagazig University demonstrates that the combined application of chemical and bio-phosphorus fertilizers can significantly improve the productivity and quality of Valencia orange trees. The results highlight the importance of phosphorus in enhancing fruit quality and suggest that bio-fertilization can play a crucial role in sustainable agriculture. By improving our understanding of nutrient interactions and the role of bio-fertilizers, this study paves the way for more effective and environmentally friendly fertilization practices.

FruitsAgriculturePlant Science

References

Main Study

1) Comprehensive evaluation of using mineral and bio phosphorus fertilization on orange tree (Citrus sinensis) productivity.

Published 15th November, 2024

https://doi.org/10.1016/j.heliyon.2024.e39603

Related Studies

2) Effects of phosphorus on fruit soluble sugar and citric acid accumulations in citrus.

https://doi.org/10.1016/j.plaphy.2021.01.015

3) Interaction Between Macro- and Micro-Nutrients in Plants.

https://doi.org/10.3389/fpls.2021.665583

4) Nano and fine colloids suspended in the soil solution regulate phosphorus desorption and lability in organic fertiliser-amended soils.

https://doi.org/10.1016/j.scitotenv.2022.160195


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