摘要
在有限水分条件下,对盆栽石楠苗木的生长率和存活期、叶片和土壤水分水势动态变化进行研究。结果表明:(1)保水剂能提高土壤田间持水量10.8%～93.2%;(2)在停止供水后,有保水剂处理的土壤含水量、水势下降缓慢,保水剂用量越大,效果越好;(3)苗木叶片相对含水量、叶片水势下降延迟,苗木的生长受到抑制的时间延后,保水剂用量越大,效果越好;(4)保水剂处理延长苗木的生存期3.5～38.5d。
Under limited water condition,the study was carried out on survival time and growth efficiency of Photinia serrulata seedlings and dynamics of water content and water potential of soil and leaves in the pot experiment. The following results were obtained:(1)The hydrogel increased the full field water content by 10.8%~93.2%;(2)Water content and potential of soil with hydrogel reduced slowly and the effect increased with the increase of hydrogel content under no water supply condition;(3)Relative water content and water potential of leaves decreased slowly and the seedling growth was retarded later with the increase of hydrogel;(4)Seedlings survival time was prolonged by 3.5~38.5 d by the application of hydrogel.
出处
《水土保持研究》
CSCD
2004年第2期121-124,共4页
Research of Soil and Water Conservation
基金
昆明市科技局计划项目
德国DEGUSS公司
国家科委推广项目
关键词
保水剂
石楠
水分水势
干旱
动态变化
hydrogel
Photinia serrulata
water content and potential
drought
dynamics
