根际通气对盆栽玉米生长与根系活力的影响  

Effects of rhizosphere ventilation on growth and root activity of potted maize

作　　者：郭超[1] 牛文全[1,2] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,杨凌712100 [2]中国科学院水利部水土保持研究所,杨凌712100

出　　处：《中国生态农业学报》2010年第6期1194-1198,共5页Chinese Journal of Eco-Agriculture

基　　金："十一五"国家高技术研究发展计划(863计划)项目(2006AA100214)资助

摘　　要：针对盆栽作物生长空间有限且通气不良的生长环境问题,为改善根际气体环境,试验设每隔2d通气1次(T1)、每隔4d通气1次(T2)两个通气处理,以不通气(CK)为对照,研究根际通气对盆栽玉米生长及根系活力的影响。结果表明,T1和T2处理均能提高玉米株高、叶面积、叶绿素含量,促进地上部分和地下部分干物质的积累。T1、T2处理有利于提高玉米根冠比和根系活力,拔节期T1和T2处理的根冠比分别是CK的1.27倍、1.18倍,根系活力分别为CK的1.26倍和1.54倍;抽穗期根冠比分别为CK的1.18倍、1.09倍,根系活力分别为CK的1.22倍和1.40倍。同时,通气处理能够促进作物吸收土壤内的养分。研究结果表明,根际通气能够增强盆栽玉米的根系活力,促进植株的生长发育。To aim at the problems of limited and defective aeration environment of potted crops, we conducted an experiment with three ventilation treatments （T1： ventilating root zone every three days; T2： ventilating root zone every five days; CK： no ventilation） to investigate the effects of different rhizosphere aeration environments on growth and root activity of potted maize. The results show that T1 and T2 treatments improve plant height, leaf area, chlorophyll content, dry matter accumulation of aboveground and under-ground parts of potted maize. T1, T2 treatments increase root-shoot ratio （RSR） and root activity （RA） compared with CK. RSR, RA of T1 and T2 are 1.27, 1.18 times, and 1.26, 1.54 times of those of CK in elongation stage. In heading stage, they are 1.18 and 1.09 times, 1.22 and 1.40 times. Rhizosphere ventilation also promotes absorption of nutrient of soil. The results mean that rhizosphere ventilation enhances root activity and increases crops growth.

关 键 词：根际通气 盆栽玉米 生长状况 生理指标 根系活力 

分 类 号：S154.37[农业科学—土壤学]