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Reasonable planting density and depth are the common cultivation techniques to increase sugarcane yield per unit area. However, the effect on sugarcane lodging is often neglected when the yield is increased. Sugarcane variety Zhongtang 3 was used as the experimental material to determine the effect of different planting density and depth on the yield and lodging. Four planting density 3.0, 4.5, 6.0 and 7.5 buds/m2 and two planting depth of shallow planting (30 cm) and deep planting (40 cm) were designed in the experiment. The agronomic characters, lodging related index (root lodging and stalk lodging) and yield of sugarcane were measured. The results showed that as the growth period of sugarcane continued to advance, the safety factor of sugarcane root and stem gradually decreased, and the risk of root lodging and stem lodging of sugarcane was higher at 180 days after planting, which was in a sensitive period. When the planting density increased from 3 buds/m2 to 6 buds/m2, sugar yield (+32%) and yield (+36%) of sugarcane were significantly increased, and the stem lodging resistance of sugarcane was also increased. However, when the planting density was further increased to 7.5 buds/m2, the sugar yield and yield did not increase significantly, but the risk of root lodging was increased. Compared with planting depth of 30 cm, planting depth of 40 cm had a tendency to increase sugar yield (+2.8%) and yield (+4.8%), although there was no significant difference between them. Therefore, considering sugar yield, yield and lodging resistance of sugarcane, we believe that planting depth of 40 cm and planting density of 6 buds/m2 can improve lodging resistance of sugarcane while ensuring yield and sugar yield.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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