Figures (8)  Tables (0)

    • Figure 1. 

      (a) Location of the study area, and (b) test design site.

    • Figure 2. 

      (a) Correlation analysis among soil physical and chemical properties. (b) Linear relationship between acid phosphatase and total phosphorus, (c) acid phosphatase and available phosphorus, (d) phytase and total phosphorus, (e) phytase and available phosphorus. TN: total nitrogen, TP: total phosphorus, TK: total potassium, AN: available nitrogen, AP: available phosphorus, AK: available potassium. * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001.

    • Figure 3. 

      (a) Effect of phosphorus based on organic fertilizer on 100-bud weight of one bud of tea plant and (b) bud density per 0.04 m2. Different * indicates the level of difference between treatments: * p < 0.05, ** p < 0.01, *** p < 0.001.

    • Figure 4. 

      Effect of phosphorus on root growth in Camellia sinensis. (a) Root phenotype before phosphorus treatment, (b) root phenotype after phosphorus treatment.

    • Figure 5. 

      Effect of phosphorus based on organic fertilizer on metabolites of different leaf positions in C. sinensis. (a) Water extract, (b) free amino acid, (c) total polyphenols, (d) caffeine.

    • Figure 6. 

      (a) Effect of phosphorus based on organic fertilizer on chlorophyll content in C. sinensis chlorophyll fluorescence of different leaf positions in C. sinensis. Relationship between total phosphorus and chlorophyll a/b content on (b) bud, (c) first leaf and (d) second leaf in C. sinensis.

    • Figure 7. 

      Effect of phosphorus based on organic fertilizer on hydrogen peroxide and superoxide anion contents in C. sinensis. hydrogen peroxide content on (a) bud, (b) first leaf, and (c) second leaf, (d) DAB staining in first leaf, (e) superoxide anion content on bud, (f) first leaf, and (g) second leaf, (h) NBT staining in first leaf. Different * indicates the level of difference between treatments: * p < 0.05, ** p < 0.01, *** p < 0.001.

    • Figure 8. 

      Principal components analysis of phosphorus based on organic fertilizer on antioxidant enzymes of different leaf positions in C. sinensis.