Table 4.
Effects of extracts and root exudates on growth of barnyardgrass in greenhouse.
| Sample | Shoot Height | Root Length | Dry Weight | AI |
|---|---|---|---|---|
| (cm) | (cm) | (g) | (%) | |
| Extracts (1 mg/mL) | ||||
| K10 | 45.9 a (−5.4) | 18.2 b (−39.7) | 1.7 bc (−23.0) | −22.7 |
| J10 | 43.5 a (−10.3) | 24.3 ab (−19.4) | 1.7 bc (−20.2) | −16.6 |
| K25 | 42.8 a (−11.7) | 26.4 a (−12.6) | 1.4 c (−33.8) | −19.4 |
| J25 | 43.8 a (−9.8) | 25.2 a (−16.6) | 1.6 bc (−28.6) | −18.3 |
| K32 | 44.7 a (−7.8) | 26.4 a (−12.6) | 1.8 ab (−15.7) | −12.0 |
| J32 | 45.5 a (−6.2) | 24.3 ab (−19.4) | 1.7 bc (−23.2) | −16.3 |
| K37 | 42.3 a (−12.9) | 24.9 ab (−17.6) | 1.5 bc (−30.0) | −20.2 |
| J37 | 44.9 a (−7.4) | 24.6 ab (−18.4) | 1.7 bc (−23.7) | −16.5 |
| Control | 48.5 a (0.0) | 30.2 a (0.0) | 2.2 a (0.0) | |
| AI (%) | −8.9 | −19.5 | −24.8 | |
| P Variety | ns | ns | ns | |
| P Temperature | ns | * | * | |
| P Variety*Temperature | ns | * | ns | |
| Exudates (50%) | ||||
| K10 | 42.6 bc (−11.3) | 20.0 abc (−8.4) | 3.3 a (+3.8) | −5.3 |
| J10 | 42.4 c (−11.8) | 19.0 bcd (−13.4) | 3.0 e (−5.2) | −10.1 |
| K25 | 44.6 abc (−7.2) | 17.3 cd (−20.9) | 2.5 g (−23.0) | −17.0 |
| J25 | 48.0 a (−0.2) | 16.2 d (−25.9) | 3.0 e (−5.1) | −10.4 |
| K32 | 43.5 bc (−9.5) | 18.8 cd (−14.1) | 3.2 c (−0.7) | −8.1 |
| J32 | 46.9 ab (−2.4) | 17.3 cd (−20.9) | 2.7 f (−17.1) | −13.5 |
| K37 | 46.1 abc (−4.0) | 18.4 cd (−16.2) | 3.1 d (−3.8) | −8.0 |
| J37 | 42.0 c (−12.6) | 22.4 a (+2.5) | 3.2 c (−0.8) | −3.6 |
| Control | 48.1 a (0.0) | 21.9 a (0.0) | 3.2 b (0.0) | |
| AI (%) | −7.4 | −14.7 | −6.5 | |
| P Variety | ns | ns | * | |
| P Temperature | * | * | * | |
| P Variety*Temperature | * | * | * | |
Means within a column followed by the different letters are significantly different at p < 0.05. Numbers in parentheses are the rates in comparison with control; “+” symbol shows promotion percentage over control, “−” symbol shows inhibition percentage over control. AI: Average Inhibition. *: significantly different (p < 0.05), ns: not significantly different.