单 位:
沈阳农业大学园艺学院;设施园艺省部共建教育部重点实验室;辽宁省设施园艺重点实验室
关键词:
汽雾法栽培;根系生长;农产品;网纹甜瓜;根际CO2浓度;根系活力
摘 要:
采用气雾法栽培方式,在开花结果期对网纹甜瓜进行不同浓度的根际CO2处理,探讨根际CO2浓度对网纹甜瓜根系生长及伤流中4种内源激素含量的影响。结果表明:随着处理时间的延长,根际CO2浓度为2500μL/L处理和5000μL/L处理与350μL/L处理相比,根系的生长受到了抑制,根系活力呈先升高后降低的趋势。同时伤流液体积、电导率、pH值以及促进生长类激素IAA(生长素)、ZT(玉米素)、GA3(赤霉素)含量显著降低,而ABA(脱落酸)含量升高。说明根际CO2浓度超过2500μL/L就会明显影响网纹甜瓜根系生长和根系合成生长类内源激素的能力,这可能也是土壤栽培和基质无土栽培较汽雾法栽培减产的重要原因之一。
译 名:
Effects of rhizosphere CO_2 concentration on root growth and activity of netted muskmelon
作 者:
Li Tianlai1,2,3, Chen Yadong1,2,3, Liu Yiling1,2,3, Qin Xing1 (1. College of Horticulture, Shenyang Agricultural University, Shenyang 110161, China; 2. Key Laboratory of Protected Horticulture, Ministry of Education, Shenyang 110161, China; 3. Key Laboratory of Protected Horticulture of Liaoning Province, Shenyang 110161, China)
关键词:
areoponic cultivation, root growth, agricultural products, netted muskmelon, rhizosphere CO2 concentration, root activity
摘 要:
In order to understand the effects of rhizosphere CO2 concentration on root growth and contents of fourhormones in xylem sap, areoponic cultivation experiments were conducted during anthesis and fruiting periods on root system of metted muskmelon with different CO2 concentrations. The results showed that in treatments of CO2 concentrations of 2500 and 5000 μL/L, root growth was inhibited and root activities were increased and then decreased compared with a treatment of CO2 concentration of 350 μL/L. At the same time, xylem sap volume,conductance, pH value and promoting hormone contents such as Indole acetic acid, Zeatin, Gibberellin A3, were decreased, but Abscisic acid content increased. The results show that the growth and hormone synthesis of root can be influenced when the rhizosphere CO2 concentration is greater than 2500 μL/L. It may be the important reason why areoponic cultivation advances the yield of plant compared with soil cultivation and substrate soilless cultivation.