Table 3.
Effect of precipitation levels and cropping system of invasive and native weeds on plant height and biomass
| Treatment | Chlorophyll | Plant Height | Wet Biomass | Dry Biomass | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Precipitation level (P) | Aug | Oct | Dec | Aug | Oct | Dec | Shoot | Root | Shoot | Root | |
| PL | 36.0B | 36.4B | 33.6B | 7.18B | 16.6B | 23.8B | 18.5B | 21.7B | 6.36 C | 6.55 C | |
| PN | 35.7 C | 37.8 A | 35.4 A | 8.25 A | 21.3 A | 30.0 A | 20.9 A | 26.4 A | 11.5 A | 14.3 A | |
| PH | 37.3 A | 35.8 C | 34.7 A | 5.01 C | 15.8 C | 23.0 C | 9.77 C | 9.04B | 10.5B | 13.3B | |
| Cropping system (CS) | |||||||||||
| SC | 38.9 A | 37.0B | 36.4 A | 8.80 A | 26.5 A | 35.4B | 18.7B | 28.8 A | 13.0 A | 20.5 A | |
| WC | 34.8D | 37.8 A | 34.0 C | 5.68 C | 11.5 C | 16.6 C | 28.6 A | 23.2B | 11.4B | 11.7B | |
| I-SC | 35.2 C | 36.1 C | 34.7B | 7.41B | 23.9B | 36.3 A | 8.55D | 10.52 C | 6.81 C | 8.18 C | |
| I-WC | 36.5D | 35.7D | 33.0D | 5.36 C | 9.63D | 14.1D | 9.61 C | 8.06D | 6.59 C | 5.04D | |
| Interaction (P × CS) | |||||||||||
| PL | SC | 38.6b | 35.5e | 34.4c | 9.89ab | 25.9c | 32.7d | 26.3b | 26.2c | 9.09e | 13.0d |
| PL | WC | 34.4 g | 38.8b | 33.4d | 5.82de | 9.30i | 15.3 h | 24.9c | 20.7d | 6.14 h | 3.85j |
| PL | I-SC | 34.9 fg | 35.8e | 34.7c | 7.64c | 23.7d | 35.4c | 9.97 g | 12.13f | 5.18i | 5.39i |
| PL | I-WC | 36.2d | 35.4e | 32.0e | 5.38ef | 7.30j | 11.7j | 12.98e | 10.83 g | 5.03i | 3.90j |
| PN | SC | 38.4b | 40.6a | 38.5a | 10.6a | 27.6b | 38.2b | 17.0d | 44.1a | 17.2a | 22.0b |
| PN | WC | 33.7 h | 36.8d | 34.6e | 6.90 cd | 14.1f | 21.5f | 50.2a | 42.3b | 12.0d | 20.2c |
| PN | I-SC | 34.9f | 36.8d | 34.8e | 9.10b | 31.2a | 42.1a | 7.55ij | 12.10f | 7.90f | 9.85f |
| PN | I-WC | 35.7e | 36.8d | 33.7d | 6.40cde | 12.3 g | 18.0 g | 8.78 h | 7.15hi | 8.99e | 5.09i |
| PH | SC | 39.6a | 35.0e | 36.4b | 5.90de | 25.9c | 35.2c | 13.0e | 16.1e | 12.8c | 26.4a |
| PH | WC | 36.3d | 37.7c | 34.1c | 4.33f | 11.1 h | 13.1i | 10.86f | 6.50ij | 16.1b | 11.2e |
| PH | I-SC | 35.6e | 35.6e | 34.7c | 5.50ef | 16.9e | 31.3e | 8.13hi | 7.32 h | 7.34 g | 9.31 g |
| PH | I-WC | 37.6c | 34.8f | 33.4d | 4.30f | 9.30i | 12.5ij | 7.08j | 6.19j | 5.73 h | 6.11 h |
| ANOVA | DF | P | P | P | P | P | P | P | P | P | P |
| P | 2 | 416*** | 93.0*** | 68.9*** | 37.0*** | 1708*** | 768*** | 2232*** | 3100*** | 1376*** | 3011*** |
| CS | 3 | 781*** | 101*** | 130*** | 42.5*** | 4914*** | 3880*** | 5031*** | 5880*** | 811.6**** | 3851*** |
| P × CS | 6 | 14.4*** | 102*** | 20.6*** | 2.84* | 215*** | 31.5*** | 2019*** | 2084*** | 152.0*** | 480.2*** |
Lowercase letters indicate significant for the interaction of precipitation levels and cropping system variability (p < 0.05). Uppercase letters indicate variability between nutrient levels and cropping system (p < 0.05). Precipitation (P), cropping system (CS), Precipitation × cropping system (P × CS), low precipitation (PL), normal precipitation (PN) and high precipitation (PH); control (CK); pot having no plant, invasive S. canadensis mono-cropping (SC), native Wedelia chinesis mono-cropping (WC), invasive intercropping (I-SC), native intercropping system (I-WC)