| 低磷胁迫对不同水稻品种根系形态和养分吸收的影响 |
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| 引用本文： | 李锋,潘晓华,刘水英,李木英,杨福孙. 低磷胁迫对不同水稻品种根系形态和养分吸收的影响[J]. 作物学报, 2004, 30(5): 438-442 |
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| 作者姓名： | 李锋 潘晓华 刘水英 李木英 杨福孙 |
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| 作者单位： | 江西农业大学农学院，江西南昌330045 |
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| 基金项目： | 江西省跨世纪学术和技术带头人培养计划 |
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| 摘 要： | 以耐低磷品种大粒稻、莲塘早3号和低磷敏感品种沪占七、新三百粒为材料，采用砂培，测定常磷（10 mg/L）和低磷（0.5 mg/L）两个磷水平下，根系形态、同化物分配、矿质元素吸收、离子吸收耗能的品种差异。实验结果表明，低磷胁迫下，耐低磷品种的总根数、总根长、总根表面积、侧根长、侧根数及侧根密度均明显增加，而低磷敏感
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| 关 键 词： | 水稻 低磷 根系形态 根/冠比 同化物分配 离子耗能 |
| 收稿时间： | 2002-11-19 |
| 修稿时间： | 2002-11-19 |
Effect of Phosphorus Deficiency Stress on Root Morphology and Nutrient Absorption of Rice Cultivars |
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| LI Feng,PAN Xiao-Hua,LIU Shui-Ying,LI Mu-Ying,YANG Fu-Sun. Effect of Phosphorus Deficiency Stress on Root Morphology and Nutrient Absorption of Rice Cultivars[J]. Acta Agronomica Sinica, 2004, 30(5): 438-442 |
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| Authors: | LI Feng PAN Xiao-Hua LIU Shui-Ying LI Mu-Ying YANG Fu-Sun |
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| Affiliation: | College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, Jiangxi |
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| Abstract: | With sandy culture, the difference of the root morphology, assimilation product distribution, mineral nutrient absorption and energy requirement of anion absorption were investigated among the low phosphorus tolerant rice (Oryza sativa L.) cultivars (Dld and Ltz 3) and the low phosphorus sensitive cultivars (Hzq and Xsbl) at 10 mg/L and 0.5 mg/L phosphorus (P). The results showed that under low phosphorus condition, the root number, length, surface, and lateral root length, number and density for the tolerant rice cultivars increased obviously, while those for the sensitive cultivars were on verse except lateral root density; compared with the sensitive cultivars, more assimilation products were distributed to root in the tolerant cultivars; the ratio of root to shoot in all cultivars increased, but the tolerant cultivars increased more significantly; less energy requirement of anion absorption might contribute to the more mineral nutrient in the tolerant cultivars. |
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| Keywords: | Rice Low phosphorus deficiency Root morphology Ratio of root to shoot Distribution of assimilation (pro-)(ducts) Energy requirement of anion absorption |
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