摘要
研究了添加不同比例AXIS硅藻土的坪床对杂交狗牙根草坪耐旱能力的影响。结果表明,与纯砂对照相比,添加5%,10%和15%的AXIS硅藻土能够提高干旱胁迫条件下草坪的生长速率、叶片的光化学效率、叶绿素含量、叶片的相对含水量,维持较低的叶片电导率,而且其改善效应随添加比例的增加而提高。添加硅藻土后草坪耐旱性能的提高可能与根际层土壤能够维持较高的含水量以及较大的根系生物量有关。
The water holding capacity of soil in root zone of sport turf could be improved by adding diatomite into the sand in turf bed.This study was conducted to evaluate the improvement of drought tolerance of ber-mudagrass by adding diatomite in different rates.The results showed that the growth rate,phytochemical effi-ciency,chlorophyll content,leaf relative water content could be increased by adding 5%,10% and 15% of diat-omite into the sand in root zone and maintained the lower electrolyte leakage compared to the pure sand control under drought stress.The improvement of drought tolerance was correlated to the application rate of diatomite. These results indicated that the improvement of drought tolerance by adding diatomite could result from the higher soil water content and the large root biomass under the drought stress.
出处
《草原与草坪》
CAS
2013年第5期6-9,14,共5页
Grassland and Turf
基金
国家农业科技成果转化项目(2011GB23600007)
上海市科委重大科技攻关项目(11231200900)资助
关键词
硅藻土
狗牙根
耐旱性
根系生物量
diatomite
bermudagrass
drought tolerance
root biomass
