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Original Articles

Seasonal variation of soil enzyme activities in relation to nutrient and carbon cycling in Senna alata (L.) Roxb invaded sites of Puducherry region, India

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Pages 155-168 | Received 27 Sep 2017, Accepted 03 Mar 2018, Published online: 09 Apr 2018

Figures & data

Table 1. Different sites in geographical coordination and soil physical parameters of six study sampling sites in Puducherry, India.

Table 2. Weather report of Puducherry, India.

Figure 1. Study area. Source: Author.

Figure 1. Study area. Source: Author.

Figure 2. Cassia alata L.

Figure 2. Cassia alata L.

Figure 3. Relationship between soil enzyme activity and TOC during in different season post-monsoon, summer, pre-monsoon, monsoon in the unit of enzyme activity in of β-glucosidase (μg p-NP g−1dwt h−1) cellulase (glucose equivalent μg g−1dwt 24 h−1), saccharase (glucose equivalent μg g−1dwt 3 h−1), Xylanase (glucose equivalent μg g−1dwt 24 h−1), TOC (g/kg) in six sites in Puducherry, India.

Figure 3. Relationship between soil enzyme activity and TOC during in different season post-monsoon, summer, pre-monsoon, monsoon in the unit of enzyme activity in of β-glucosidase (μg p-NP g−1dwt h−1) cellulase (glucose equivalent μg g−1dwt 24 h−1), saccharase (glucose equivalent μg g−1dwt 3 h−1), Xylanase (glucose equivalent μg g−1dwt 24 h−1), TOC (g/kg) in six sites in Puducherry, India.

Table 3. Soil physico-chemical properties in post-monsoon and summer season six study sites in Puducherry, India.

Table 4. Soil physico-chemical properties inpre-monsoon and monsoon seasons of six study sites in Puducherry, India.

Table 5. Soil enzyme activities in post-monsoon and summer six study sites in Puducherry, India.

Table 6 Soil enzyme activities in pre-monsoon and monsoon six study sites in Puducherry India.

Figure 4. (a,b,c,d). Principal component analysis with three sets of variables: enzymes, nutrients measured the symbols indicate the corresponding score group means ± SE and the arrows represent variable eigenvectors in the space plotted by the first two PCA axes. The projection of the lines along each axis indicates their relative importance.

Figure 4. (a,b,c,d). Principal component analysis with three sets of variables: enzymes, nutrients measured the symbols indicate the corresponding score group means ± SE and the arrows represent variable eigenvectors in the space plotted by the first two PCA axes. The projection of the lines along each axis indicates their relative importance.

Table 7. Correlation between soil enzymes and physico-chemical properties six study sites in Puducherry, India.