植物营养与肥料学报2013，19(1)：20-25 Plant Nutrition and Fertilizer Science
doi: 10. 11674/zwyf. 2013. 0103
CO,浓度升高对不同水稻品种幼苗养分吸收和
根系形态的影响
李中阳，宋正国2·，樊向阳'，杜臻杰（1中国农业科学院农田灌溉研究所，河南新乡453003；
2农业部环境保护科研监测所生态毒理与环境修复研究中心，天津300191）
摘要：本文利用水培试验研究了CO，浓度升高对水霜幼苗生物量、养分含量和根形态的影响，探讨了CO，浓度升高下粤杂889(YZ)和荣优398(RY)幼苗养分吸收和根系形态的差异性。结果表明，与CO，浓度正常水平（对照）相比，C0，浓度升高显著增加了2个水品种幼苗根系、基叶和总生物量，YZ分别增加58.33%、27.96%、33.16%； RY分别增加45.87%、34.17%、36.07%。同时，CO，浓度升高增加了2个水稻品种的根冠比。C0，浓度升高显著降低了2个水稻品种基叶中的N、P、K、Ca、Mg和Fe含量，这是"稀释效应"的结果；但YZ幼苗中S含量显著增加， 2个品种幼苗Mn含量均显著增加。CO，浓度升高显著增加了2个水稻品种的幼苗根系根毛数、总根长、表面积，降低幼苗粗根比例，增加了细根比例。CO，浓度升高增加了细根在总根长中的比例，有利于水霜对养分的吸收，导致部分营养元索含量增加；但CO，浓度升高条件下水稻生物量的增加使大部分营养元素含量降低。同时，CO，浓度
升高对水霜幼苗生物量、养分吸收和根形态的影响存在显著的品种差异。关键调：CO,，浓度升高；水稽；品种；营养元素；根形态
中图分类号：S511.01；S181
文献标识码：A
文章编号：1008505X(2013)01002006
Effectsof elevatedCO,onnutrientelementuptakesandroot
morphologyofdifferentricevarieties
LI Zhong-yang' , SONG Zheng-guo'' , FAN Xiang-yang' , DU Zhen-jie
(I Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang, Henan 453003, China; 2 Censtre for Research in Ecotoxicology and Enwironmental Remedigtion, Agro-Entironmental Protection Institute,
Ministry of Agriculture, Tianjin 300191, China)
Abstract: A hydroponic experiment was conducted to study the effects of elevated CO, on the rice seedlings biomass, nutrient concentration and root morphology of rice Yueza-889(YZ) and Rongyou-398(RY). The results show that compared with the control, the root, shoot and total dry weights of YZ and RY are increased significantly under the elevated CO,, the weights are increased by 58. 33% , 27. 96% and 33. 16% for YZ and increased by 45. 87% , 34. 17% and 36. 07% for RY, respectively. The roots to shoot ratios of the two rice cultivars are also increased under the elevated CO,.The shoot N, P, K, Ca, Mg and Fe contents of the two rice cultivars are decreased under the elevated COz, while the Mn contents are increased. The shoot S concentration of YZ is increased, while the shoot S concentration of RY is decreased. The root tip numbers, length and surface area, the proportion of fine roots are also increased under the elevated. The elevated CO, increases the proportion of fine roots, and this is a favorable change for rice to uptake more nutrition elements which could be one of the main reasons for increases of some elements concentrations, but the elevated CO, dilutes most elements in this pot
收日期：2012-04-27
接受日期：201208-12
基金项目：中央级公益性科研院所基本科研业务费专项基金（0032012034）；国家自然科学基金（51209208，41071217）；国家高技术研究发展
计划（863计期）项目（2012AA101404）；科技部水体污染控制与治理项目(2009ZX07212-004）资助。
作者简介：率中阳（1980-），男，河南省确山县人，博士，助理研究员，主要从事污土壤生态修复及再生水利用的研究。
E-mail:; lizhongysang1980@163. com。
通信作者E-mail：forestman1218@163.com。
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