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水分、抗旱剂BGA耦合对大叶黄杨抗寒性的影响 被引量:1

Coupling effects of soil moisture and BGA, a drought resistant agent, on cold resistance of Euonymus japonicus
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摘要 为了探索北方城市绿化常绿阔叶灌木抵御冬季冻害能力的水分、有机抗旱剂BGA的最佳耦合环境,在中国农业大学试验基地内,用电导法和冻害调查法测定了小区、盆栽大叶黄杨的抗冻害能力随土壤水分和BGA用量的变化规律.结果显示:土壤水分、BGA用量以及它们之间的交互作用对大叶黄杨的抗冻害能力有极显著的影响.当土壤含水量在60%~75%FC(田间持水量)时,大叶黄杨的抗冻害能力与BGA用量的关系为开口向下的二次抛物线关系,其他水分水平,呈线性下降关系;施用BGA时,大叶黄杨的抗冻害能力与土壤含水量的关系亦为开口向下的二次抛物线关系,在60%~75%FC时最大.最后,提出了适宜于大叶黄杨抗寒性的土壤水分、BGA用量的大致耦合范围. Beijing Green Angle (BGA) is a new organic drought resistant agent. In order to investigate the effective coupling range of soil moisture and BGA dosage to improve the cold resistance of evergreen broadleaved shrubs that were planted in the cities of northern China, cold resistance was measured in field and pot experiments at China Agricultural University for Euonymus japonicus under various soil moisture and BGA dosage by an electric conductivity meter and field investigation. Results indicated that soil moisture, BGA dosage and their interaction all had significant impacts on frost tolerance of E. japonicus. When soil moisture ranged between 60% and 75% of field water capacity (FC), the frost tolerance of E. japonicus increased with an increase of BGA dosage, but decreased after BGA dosage reached the maximum value. The frost tolerance decreased linearly when soil moisture was less than 65 % or higher than 75 % of FC. When BGA was applied, frost tolerance of E. japonicus also increased with an increase of soil moisture. It decreased when soil moisture reached its maximum at 65 %-75 % of FC. Finally, we recommended an approximate coupling range of soil moisture and BGA dosage, which was suitable to cold resistance of E. japonicus.
出处 《北京林业大学学报》 CAS CSCD 北大核心 2006年第4期112-117,共6页 Journal of Beijing Forestry University
基金 "863"国家高新技术项目(2002AA2Z428106).
关键词 常绿阔叶灌木 抗寒性 土壤含水量 BGA用量 耦合范围 evergreen broadleaved shrub, cold resistance, soil moisture, BGA dosage, coupling range
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