Table 6.
Allelochemicals in the root extracts of sugarcane ratoons of different ages.
| Retention time (min) |
Chemical compound | Relative content(%) | ||
|---|---|---|---|---|
| J1-3 | J2-3 | J3-3 | ||
| 4.253 | 3-Methoxy-2-methyl-Phenol | – | 2.08 | 5.01 |
| 4.317 | 2-Chloro-3-hydroxy-butyric acid | – | – | 0.71 |
| 4.394 | 4-(Methoxymethyl)phenol | 0.67 | – | – |
| 4.585 | O-xylene | – | 1.52 | 2.10 |
| 5.183 | Isopropanol | 3.19 | – | 1.57 |
| 5.383 | 1,3-Dihydroxyacetone | 6.42 | 9.76 | 2.07 |
| 5.973 | 4-Methyl-2-hexanol | 7.72 | 1.16 | 1.23 |
| 6.634 | Ethyl butanoate | 2.78 | 4.86 | 0.87 |
| 7.160 | 3-Nitropropanoic acid | 1.73 | 0.85 | – |
| 7.382 | Isosorbide dinitrate | – | 0.28 | – |
| 7.667 | 2,6-Dimethylpyridin-4-amine | 3.12 | 0.95 | 0.61 |
| 9.060 | (2S)-3-(Acetylsulfanyl)-2-methylpropanoic acid | 1.23 | 1.97 | 0.87 |
| 9.419 | Furaneol | 0.52 | 0.81 | – |
| 10.109 | Undecane | 2.67 | 4.03 | 11.49 |
| 11.267 | N-Methyl-N-nitroso-2-propanamine | 1.09 | – | – |
| 11.497 | Spermine tetrahydrochloride | 6.39 | 1.18 | – |
| 11.980 | Benzoic acid | 1.13 | – | 4.22 |
| 12.441 | 4,5-Diamino-5-oxopentanoic acid | 0.25 | – | – |
| 13.006 | 2-Dodecenoic acid | – | 0.86 | 0.70 |
| 13.454 | Isosorbide | 1.00 | 0.52 | – |
| 13.856 | 3-Hydroxydodecanoic acid | 1.76 | 0.70 | 0.73 |
| 14.250 | Hexyl benzeneacetate | – | – | 0.68 |
| 14.645 | DL-mevalonolactone | – | 0.23 | 1.15 |
| 14.922 | Hydroquinone | – | – | 1.03 |
| 15.522 | Erythritol | – | 4.94 | – |
| 16.057 | 3-Butanolal | 1.29 | 1.36 | 1.94 |
| 17.043 | Syringol | – | 1.94 | – |
| 17.733 | 3-Hydroxybutyric acid | 1.48 | – | 1.42 |
| 18.966 | 3,4-Dimethoxyphenol | 1.04 | 4.03 | 2.68 |
| 19.652 | Pterin-6-carboxylic acid | – | 2.52 | 0.97 |
| 19.940 | Dihydroeugenol | 5.00 | 4.03 | |
| 20.970 | 3,5-Di-tert-butylphenol | – | – | 1.15 |
| 21.240 | N-butanoyl-DL-homoserine lactone | – | 1.48 | – |
| 21.672 | 2,6-Dimethoxyhydroquinone | 1.31 | 4.23 | 2.70 |
| 22.271 | 3-Hydroxy-4-methoxybenzoic acid | 0.30 | 1.17 | 3.38 |
| 23.378 | 3,4,5-Trimethoxyphenol | 0.71 | 1.49 | 0.71 |
| 24.219 | Hydroconiferyl Alcohol | 1.03 | 3.80 | – |
| 24.542 | Adipic acid divinyl ester | 1.15 | 1.12 | 0.74 |
| 25.059 | 2-Hexyl-1,1-bicyclopropane-2-octanoic acid methyl ester | – | 0.85 | 0.64 |
| 26.150 | Dihydroferulic acid | 8.72 | 7.98 | 5.49 |
| 26.664 | 1-(4-methoxyphenyl)-1,4-butanediol | 0.97 | 0.76 | 1.05 |
| 27.396 | 2-Amino-3-(5-nitro-3H-imidazol-4-yl)propanoic acid | 0.44 | 0.90 | 0.67 |
| 27.919 | 2,6-Dimethyl-4-nitrophenol | – | 0.86 | 1.49 |
| 28.314 | 2-(5-hydroxy-1,1,5-trimethylhexyl)-3-methylcyclopropenyl, methyl ketone | 0.41 | – | – |
| 29.613 | Diisobutyl phthalate | – | 0.61 | 0.65 |
| 31.435 | Methyl palmitate | 1.33 | 0.25 | 0.41 |
| 33.086 | Palmitic acid | 2.54 | 0.58 | 1.28 |
| 33.242 | (4-Hydroxy-3,5-dimethoxy-phenyl)-acetic acid methyl ester | 0.92 | – | – |
| 34.428 | Trans-sinapyl alcohol | 0.87 | 1.19 | – |