Content difference and correlation analysis of leaf mineral element and fruit quality in different pomegranate cultivars
2019
Feng, L. | Yin, Y. | Yang, X.
In order to probe into the relationship between leaf mineral elements and fruit quality in pomegranate, the contents of nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), copper (Cu), zinc (Zn), and manganese (Mn) in leaves of 10 pomegranate cultivars were determined. The relationships between these mineral element contents and single fruit weight, total soluble solid, titratable acid and soluble sugar were investigated. The result indicated that the content of N, P, K, Ca and Mg was in the range of 15.49~22.07, 0.78~1.27, 7.31~12.69, 1.35~3.30 and 2.20~2.93 g kg(‑1). The content range of Fe, Cu, Zn and Mg respectively was 21.51~50.93, 3.87~9.37, 31.60~59.02 and 45.78~87.08 mg kg(‑1). The highest content of N, Mg, Fe and Cu was found in ‘Taishanhong’, ‘Qingpiruanzi’, ‘Mantianhong’ and ‘Taihanghong’, respectively. The content of P and Ca were highest in ‘Lanbaoshi’. The highest content of K and Zn both existed in ‘Qiuyan’. There was significant difference in the mineral elements contents of different pomegranate cultivars. The range of single fruit weight, soluble solid, titratable acid and soluble sugar was 286.54~524.24 g, 15.34~16.75%, 0.32~0.98%, and 119.36~179.56 g L(‑1), respectively. The single fruit weight and soluble solid content were highest in ‘Taishanhong’. The highest content of titratable acid and soluble sugar was in ‘Lanbaoshi’ and ‘Piyaman’, respectively. Correlation analysis showed that N had significantly negative correlation with Zn. Single fruit weight was significantly positively correlated with Cu. There was positive correlation between P and titratable acid. The result could provide theoretical basis for scientific nutrient management of pomegranate.
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