Author Correction: Labile organic carbon pools and enzyme activities of Pinus massoniana plantation soil as affected by understory vegetation removal and thinning

A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.

The Article also contains errors in Table 2 where EOC was incorrectly given as ROC. In addition, Table 2 contains a typographical error in the fourth row of the 'Invertase' column where '+' is erroneously present.
This Article contains errors in the Materials and Methods section under subheading 'Soil analysis'.
"This subsample was used to determine NH 4 + -N, NO 3 − -N, DOC, MBC, EOC, and enzyme activities (cellulase, amylase, invertase, and catalase). The other subsample was air-dried and sieved before use for the analysis of SOC and other soil properties (TN, TP, TK, AK, AP, and pH). " should read: "This subsample was used to determine DOC, MBC, EOC, and enzyme activities (cellulase, amylase, invertase, and catalase). The other subsample was air-dried and sieved before use for the analysis of SOC and other soil properties (TN, NH 4 + -N, NO 3 − -N, TP, TK, AK, AP, and pH). " Also under the subheading 'Sample analyses'.
"Soil pH was determined from a soil water (1:5 w/v) suspension, prepared by shaking 30 min, using a conductivity meter. " should read: "Soil pH was determined from a soil water (1:2.5) suspension, prepared by shaking 30 min, using a conductivity meter. "  Table 1. Soil chemical properties at three soil depths in the four forest management treatments (mean value ± standard error; n = 3). Significant differences among different soil layers subjected to the same treatments are identified with A, B, and C (p < 0.05). Significant differences among different treatments of the same soil layer are identified with a, b, c, and d (p < 0.05), based on the analysis of variance. Finally, the authors neglected to cite a previously-published related paper. This is listed below as reference 1 .
As a result, in the Materials and Methods section under subheading 'Soil enzyme activity analysis' "Soil amylase activity was measured using 2 g of fresh soil incubated for 24 h at 37 °C according to Ebregt's method 74 . Soil invertase activity was measured as at 30 °C and pH 4.65 in Na-acetate buffer according to Gianfreda's method 75 . Soil cellulase activities were detected by an incubation according to Sharma's method 76 , and soil catalase activity was determined at pH 7.0, following the monitoring of the decomposition of H 2 O 2 at 240 nm with an extinction coefficient of 43.6 M −1 cm −1 according to Roggenkamp and Sahm 77 . " should read: "Soil amylase activity was measured using 2 g of fresh soil incubated for 24 h at 37 °C according to methods of Ebregt 74 and Guan 1 . Soil invertase activity was measured according to Guan's method 1 and Gianfreda's method 75 . The amylase and invertase activities were expreseed as mg glucose g −1 soil 24 h −1 . Soil cellulase activities were detected by an incubation according to Sharma's method 76 and Guan's method 1 , and the activity was expreseed as μmol p-nitrophenol g −1 soil h −1 . Soil catalase activity was determined at pH 7.0, following the monitoring of the decomposition of H 2 O 2 at 240 nm with an extinction coefficient of 43.6 M −1 cm −1 according to Roggenkamp 77 and Guan 1 , and the activity was expreseed as mg H 2 O 2 g −1 soil 20 min −1 . " Reference 1. Guan, S. Y. Soil enzymes and their research methods. Agriculture Press. Beijing (1986).

Figure 2.
Soil enzymes in the four forest management treatments. The three columns in each treatment represent the quantities of four soil enzymes at different soil depths. Significant differences among different soil layers subjected to the same treatments are identified with A, B, and C (p < 0.05). Significant differences among different treatments of the same soil layer are identified with a, b, c, and d (p < 0.05), based on the analysis of variance. Values are means ± standard error (n = 3).