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| 不同施磷量对大豆苗期根系形态性状的影响 | |
| 引用本文： | 金剑,王光华,刘晓冰,陈雪丽,李兴国.不同施磷量对大豆苗期根系形态性状的影响[J].大豆科学,2006,25(4):360-364. |
| 作者姓名： | 金剑 王光华 刘晓冰 陈雪丽 李兴国 |
| 作者单位： | 1. 中国科学院东北地理与农业生态研究所黑土重点实验室,哈尔滨,150040;中国科学院研究生院,北京,100039 2. 中国科学院东北地理与农业生态研究所黑土重点实验室,哈尔滨,150040 3. 东北农业大学,哈尔滨,150030 |
| 基金项目： | 哈尔滨市青年科学基金项目（2005AFQ-Y-J-011）;国家自然科学基金项目（40541004）;中国科学院知识创新项目（KZCX3-SW-NA-04）. |
| 摘 要： | 通过盆栽试验，对不同磷施用量条件下的大豆根系形态进行研究。结果表明，磷显著增加根系干重、根长、根表面积和根体积，在低磷P50（50mg／kg）处理下，根干重、根长、根表面积和根体积分别比P0（0mg／kg）处理增加88．0％、97．1％、101．7％和104．9％。适量的磷可促进根系的生长，增大根系在土壤中的养分吸收空间。磷对大豆根系形态性状的影响主要表现在根量及根长的增加上，而与不同粗细的根系分布比例关系不大。在不同施磷处理间，高磷P100（100mg／kg）处理的根系性状弱于低磷PSO处理。磷对根系的促生长作用是有一定范围的，过高的磷不但不会进一步改善根系性状，反而对其生长产生抑制作用。 |
| 关 键 词： | 大豆 磷 根系形态 |
| 文章编号： | 1000-9841（2006）04-0360-05 |
| 收稿时间： | 2006-03-08 |
| 修稿时间： | 2006-03-08 |
EFFECT OF DIFFERENT PHOSPHORUS REGIMES ON ROOT MORPHOLOGICAL CHARACTERISTICS OF SOYBEAN SEEDLING |
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| Jin Jian,Wang Guanghua,Liu Xiaobing,Chen Xueli,Li Xingguo.EFFECT OF DIFFERENT PHOSPHORUS REGIMES ON ROOT MORPHOLOGICAL CHARACTERISTICS OF SOYBEAN SEEDLING[J].Soybean Science,2006,25(4):360-364. | |
| Authors: | Jin Jian Wang Guanghua Liu Xiaobing Chen Xueli Li Xingguo |
| Institution: | 1. Key lab of black soil, Northeast Institute of Geography and Agro-ecology, Chinese Academy of Science, Harbin 150081 ; 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039;3. Northeast Agricultural university, Harbin 153000 |
| Abstract: | The response of soybean root morphology to different phosphorus regimes was researched by a pot experiment.The results showed that phosphorus significantly increased root dry weight,root length,root surface area and root volume.In the treatment of low phosphorus,i.e.P50(50 mg/kg),root dry weight,root length,root surface area and root volume were 88.0%,97.1%,101.7% and 104.9% higher than P0(0 mg/kg) treatment.This indicated that suitable phosphorus may accelerate root growth resulting in root exploring more soil space for nutrient absorption.The variation of root morphology by phosphorus was root mass and root length,rather than root percentage at different ranges of root diameters.The root morphology in P_100(100 mg/kg) treatment was worse than that in P50 treatment,suggesting that there was a threshold for phosphorus application to stimulate root growth,therefore,too much phosphorus may limit root growth but enhance it as expect. |
| Keywords: | Soybean Phosphorus Root morphology |
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