1 材料与方法
1.1 材料
1.2 方法
1.3 数据分析
2 结果与分析
2.1 磷素对不同品种甘蔗生长的影响
表1 不同供磷量下2个甘蔗品种的生物量Tab. 1 The plant biomass of two sugarcane cultivars for different P rate condition g |
| 供磷量 P quantities | ROC22 | YT236 | ||
|---|---|---|---|---|
| 鲜重Fresh weight | 干重Dry weight | 鲜重Fresh weight | 干重Dry weight | |
| P0 | 16.83±3.26c | 3.88±0.45c | 15.37±0.78c | 4.48±0.44c |
| P0.1 | 205.87±68.68b | 45.51±16.94b | 147.53±14.93b | 36.91±4.43b |
| P1 | 395.93±62.83a* | 82.65±10.31a* | 247.07±6.31a | 60.20±2.47a |
Note: Number in the table is mean±SD. Different lowercase letters in the same column meant significant differences among different phosphorus rate treatments. “*” in the same line meant significant differences between sugarcane varieties treatments (DMRT, P<0.05, n=3). | |
注:表中数据为均值±标准差;同列不同小写字母表示施磷量处理间差异显著;同行“*”表示甘蔗品种处理间差异显著(DMRT,P<0.05,n=3)。 |
2.2 磷素对不同品种甘蔗光合作用的影响
表2 不同供磷量下2个甘蔗品种的叶绿素含量Tab. 2 The chlorophyll content of two sugarcane cultivars for different P rate condition mg∙g-1 |
| 供磷量 P quantities | ROC22 | YT236 | ||||
|---|---|---|---|---|---|---|
| 叶绿素a Chl a | 叶绿素b Chl b | 叶绿素总量 Chl | 叶绿素a Chl a | 叶绿素b Chl b | 叶绿素总量 Chl | |
| P0 | 13.18±0.64c | 3.47±0.36b | 16.65±0.56c | 12.34±0.93a | 4.55±0.26b | 16.89±1.18b |
| P0.1 | 14.50±0.65b* | 4.43±0.59ab | 18.93±1.23b* | 11.90±0.56a | 4.42±0.31b | 16.31±0.85b |
| P1 | 16.20±0.36a* | 5.40±1.00a | 21.60±1.06a* | 13.32±0.73a | 5.57±0.20a | 18.89±0.93a |
Note: Number in the table is mean±SD. Different small letters in the same column meant significant differences among different phosphorus rate treatments. “*” in the same line meant significant differences between sugarcane varieties treatments (DMRT, P<0.05, n=3). | |
注:表中数字为均值±标准差;同列小写字母不同表示施磷量处理间差异显著;同行“*”表示甘蔗品种处理间差异显著(DMRT,P<0.05,n=3)。 |
图2 不同供磷量下2个甘蔗品种的净光合速率柱上不同小写字母表示同品种的不同施磷量处理间差异显著;“*”表示相同施磷量下甘蔗品种处理间差异显著(DMRT,P<0.05,n=3)。 Fig. 2 The net photosynthetic rate of two sugarcane cultivars for different P rate condition Different small letters indicate significant differences among phosphorus rate treatments for the same varieties condition. “ * ” meant significant differences between the two sugarcane varieties treatments for the same phosphorus rate condition (DMRT, P<0.05, n=3). |
图3 不同供磷量下2个甘蔗品种的细胞间隙CO2浓度柱上不同小写字母表示同品种的不同施磷量处理间差异显著;“*”表示相同施磷量下甘蔗品种处理间差异显著(DMRT,P<0.05,n=3)。 Fig. 3 The intercellular CO2 concentration of two sugarcane cultivars for different P rate condition Different small letters indicate significant differences among phosphorus rate treatments for the same varieties condition. “ * ” meant significant differences between the two sugarcane varieties treatments for the same phosphorus rate condition (DMRT, P<0.05, n=3). |
图4 不同供磷量下2个甘蔗品种的气孔导度柱上不同小写字母表示同品种的不同施磷量处理间差异显著;“*”表示相同施磷量下甘蔗品种处理间差异显著(DMRT,P<0.05,n=3)。 Fig. 4 The stomatal conductance of two sugarcane cultivars for different P rate condition Different small letters indicate significant differences among phosphorus rate treatments for the same varieties condition. “ * ” meant significant differences between the two sugarcanevarieties treatments for the same phosphorus rate condition (DMRT, P<0.05, n=3). |
图5 不同供磷量下2个甘蔗品种的蒸腾速率柱上不同小写字母表示同品种的不同施磷量处理间差异显著;“*”表示相同施磷量下甘蔗品种处理间差异显著(DMRT,P<0.05,n=3)。 Fig. 5 The transpiration rate of two sugarcane cultivars for different P rate condition Different small letters indicate significant differences among phosphorus rate treatments for the same varieties condition. “ * ” meant significant differences between the two sugarcane varieties treatments for the same phosphorus rate condition (DMRT, P<0.05, n=3). |
