不同磷浓度对玉米生长及磷、锌吸收的影响

应用生态学报

不同磷浓度对玉米生长及磷、锌吸收的影响

张富仓¹；康绍忠^1,2；龚道枝¹；李志军¹

¹西北农林科技大学旱区农业水土工程教育部重点实验室，杨凌 712100;²中国农业大学水利与土木工程学院，北京 100083

收稿日期:2003-12-11 修回日期:2004-09-10 出版日期:2005-05-18

Maize growth and phosphorousand zinc uptake under different phosphorous supply levels

ZHANG Fucang¹,KANG Shaozhong^1,2,GONG Daozhi¹,LI Zhijun¹

¹Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas,Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100,China; ²College of Water Resources and Civil Engineering of China Agricultural University,Beijing 100083,China

Received:2003-12-11 Revised:2004-09-10 Online:2005-05-18

摘要/Abstract

摘要： 在不同磷水平（0.1、1.0、5.0、10和100 μmol·L^-1 P）的水培液中培养玉米苗，测定不同培养时期玉米的生长和玉米植株对P、Zn吸收和利用效率.结果表明，玉米在100 μmol·L^-1 P的溶液中生长速率最大，而根冠比在0.1 μmol·L^-1 P的溶液中为最大.随着水培液中P水平的增加，植株对P的吸收速率增加，而利用效率降低；玉米根系含Zn量增加，而冠层含Zn量变化不大，说明增P使Zn在根内富集，Zn向冠层转移速率较小，玉米幼苗根系中P和Zn的浓度呈正相关关系.

关键词: 生态农业模式, 管理信息, 决策支持系统, 中国生态农业

Abstract: By the method of solution culture,this paper studied the P and Zn uptake of maize at its growth stages under different P supply levels.The results showed that maize growth reached its maximum at the supply level of 100 μmol P·L^-¹,while the root/shoot ratio was the highest at 0.1 μmol·L^-1 P supply.Increase of P concentration in culture solution promoted the uptake of P,but decreased its utilization rate.The Zn content in root increased with increasing P supply,while that in shoot varied little,which meant that the Zn transportation rate from root to shoot had little change with increasing P concentration.There was a positive correlation between the concentrations of Zn and P in maize seedling roots.

Key words: Eco-agricultural model, Management information, Decision support system, Chinese eco-agriculture

张富仓¹；康绍忠^1,2；龚道枝¹；李志军¹. 不同磷浓度对玉米生长及磷、锌吸收的影响[J]. 应用生态学报.

ZHANG Fucang¹,KANG Shaozhong^1,2,GONG Daozhi¹,LI Zhijun¹. Maize growth and phosphorousand zinc uptake under different phosphorous supply levels[J]. Chinese Journal of Applied Ecology.

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