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자료유형
학술저널
저자정보
저널정보
한국토양비료학회 한국토양비료학회지 한국토양비료학회지 제56권 제4호
발행연도
2023.11
수록면
291 - 299 (9page)

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Phosphorus (P) is an essential mineral nutrient, which is easily precipitated and/or absorbed in the soil, and thus P use efficiency (PUE) of crops is relatively low. The spilt application of P through fertigation is considered an alternative method to improve the PUE. To evaluate the possibility, we grew upland green onions under different levels of P fertigation [no P, P100 (basal):F0 (fertigation), P50:F50, and P0:F100] and analyzed green onion growth, soil available P₂O5 concentration, and PUE. Fertigation rate was adjusted based on soil diagnosis (N-P₂O<SUB>5</SUB>-K₂O = 182-40-166 kg ha<SUP>-1</SUP>), and green onions were grown from May to early November 2022. Dry weight of green onion at harvesting stage responded positively to increasing fertigation rates (e.g., P50:F50 and/or P0:F100). Soil available P₂O<SUB>5</SUB> was the highest at early growth stage in the P100:F0, and showed a trend of gradual decrease throughout the experiment. Interestingly, soil available P₂O5 from the P0:F100 remained consistent during the whole growing season. P uptake of green onion was significantly greater in the P0:F100 than the basal fertilization, and the PUE of P0:F100 was 61.5%. Taken the results together, the fertigation of P for green onion production was effective not only in increasing crop yield but also in supplying crop-available P. In conclusion, this work suggests that the fertigation of P can be a better method to ensure yield of green onion through improved PUE.

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ABSTRACT
Introduction
Materials and Methods
Results and Discussion
Conclusions
References

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