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- W2762956066 abstract "Aluminum (Al) toxicity and phosphorus (P) deficiency are two crucial factors limiting the production of Camellia oleifera , which is grown commercially in red acidic soils in Southern China. The current study characterized the different forms of P and Al in the red acidic soils of C. oleifera plantations. Soil and plant tissue samples taken from 32 Camellia plantations across Hunan province were analyzed. Furthermore, a pot experiment with nutrient solutions of different Al and P contents was carried out to investigate P and Al uptake and their effect on C. oleifera growth. The results showed that the P content extracted by NaOH (Fe-P) was the highest in all types of soil samples (rhizosphere, 0–20 cm, and 20–40 cm zones), followed by P extracted by NH 4 F (Al-P), H 2 SO 4 (Ca-P), and Na 3 C 6 H 5 O 7 (O-P). HCl (In-Al), NH 4 Ac (Ha-Al), and Na 4 P 2 O 7 ·10H 2 O (Or-Al) extracted Al were the main forms and accounted for 22.8%, 23.1%, and 23.8% of total Al, respectively. KCl extracted Al (Ex-Al) contents in the rhizosphere, 0–20 cm, and 20–40 cm soil zones were 4.78, 4.86, and 4.59 mg·kg −1 , respectively. P contents in roots, young leaves, and old leaves were 0.80, 0.82, and 0.64 mg·kg −1 , respectively. The highest Al content of 11.35 g·kg −1 was found in the old leaves, followed by roots and young leaves. Correlation analyses revealed that P in roots was positively associated with available P (AP) and Al-P in rhizosphere. P in roots and young leaves also had a positive correlation with Ex-Al, whereas Al in old leaves was positively correlated with In-Al and total Al. Significant correlations between Al-P, Ex-Al, and AP were detected. The pot experiment indicated that adding Al or P alone increased plant growth and Al or P uptake, respectively. When adding both Al and P, significant synergistic effect was found. These results suggest that Al is beneficial to C. oleifera , which may be the adaptive mechanism of C. oleifera to use insoluble Al-P in red acidic soil." @default.
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- W2762956066 date "2017-09-01" @default.
- W2762956066 modified "2023-09-27" @default.
- W2762956066 title "Fractionation of Inorganic Phosphorus and Aluminum in Red Acidic Soil and the Growth of Camellia oleifera" @default.
- W2762956066 doi "https://doi.org/10.21273/hortsci12189-17" @default.
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