摘要
为探讨胡杨种子出苗对沙埋和供水条件的响应,对其进行0 cm、0.2 cm、0.3 cm、0.5 cm4个沙埋深度和4.4 mm、8.8 mm、17.6 mm、22.1 mm、26.5 mm5个供水处理。结果表明:①沙埋深度、供水量及两者的交互作用对出苗率的影响均达到极显著水平(P<0.01);②供水条件一致时,种子出苗的适宜埋深为0～0.3 cm,埋深为0.5cm时出苗率为0;③埋深0 cm和0.3 cm时,每天供水量17.6 mm和每两天供水量22.1 mm下的出苗率均显著高于其他处理;埋深为0.2 cm时,每天供水量8.8 mm和每两天供水量26.5 mm下的出苗率显著高于其他供水量(P<0.05);④胡杨种子出苗较为适宜的沙埋深度和供水量条件是埋深0.3 cm、每天供水量17.6 mm或每两天供水量22.1 mm。
This paper explored the effects of sand burial and water supply conditions on seedling emergence of Populus euphratica Oliv.Four treatments of artificially sand burial at depths of 0 cm,0.2 cm,0.3 cm,0.5 cm and five treatments of watering quota at gradients of 4.4 mm,8.8 mm,17.7 mm,22.1 mm and 26.5 mm were designed.The effects of sand burial depth and water supply and their interaction on emergence rate were very significant（P0.01）.Under consistent water supply,the optimal sand burial depth was 0～0.3 cm,and the emergence rate was zero at the sand burial depth of 0.5 cm.At sand burial depths of 0 cm and 0.3 cm,the seedling emergence rates under two water supply treatments of 17.6 mm for every day and 22.1 mm for every two days were notably higher than those under other treatments;while at 0.2 cm sand burial depth,the seedling emergence rate under water supplies of 8.8 mm for every day and 26.5 mm for every two days were also more than those under other water quota（P0.05）.The feasible condition for seedling emergence of P.euphratica were sand burial depth of 0.3 cm and water supply amount of 17.6 mm for every day or 22.1 mm for every two days.
出处
《中国沙漠》
CSCD
北大核心
2011年第2期436-441,共6页
Journal of Desert Research
基金
新疆科技重大专项项目(200733144-2)
国家重点基础研究发展计划项目(2009CB421302)
国家科技支撑计划项目(2009BAC54B01)
新疆维吾尔自治区科技基础条件平台建设项目(PT0801)共同资助
关键词
胡杨
沙埋深度
水分
种子
出苗率
Populus euphratica
sand burial depth
water supply
seeds
emergence rate
