摘要
采用盆栽试验的方法,研究了秋末冬初不同灌水量下限[分别占田间持水量(FC)的80%、70%、60%、50%]对高羊茅绿期及抗寒性生理指标的影响.结果表明:在冬季低温条件下,80%和70%FC灌水处理使高羊茅叶片相对含水量、保护酶(SOD、POD和CAT)活性、叶绿素、可溶性糖和游离脯氨酸含量维持在较高水平,丙二醛含量和电解质外渗率降低,高羊茅的抗寒性增强.80%FC灌水处理分别较70%、60%和50%FC处理的草坪草绿期延长4、22和28d,到达枯黄休眠的时间最晚,完成返青的时间最早.综合考虑节水和提高水分利用效率等多种因素,70%FC灌水处理为高羊茅秋末冬初季节最佳的灌水下限.
A pot experiment was conducted to study the effects of different irrigation minima [80% field capacity （FC）, 70% FC, 60% FC and 50% FC] from late autumn to early winter on the green period and cold-resistance of Festuca arundinacea. Under the low temperature in winter, treatments 80% FC and 70% FC made the leaf relative water content, POD, CAT, and SOD activities, and chlorophyll, soluble sugar, and free proline contents of F. arundinacea maintained at a higher level, but made the MDA content and electrolyte leakage decreased, resulting in an increased cold-resistance of F. arundinacea. Treatment 80% FC made the green period of F. arundinacea prolonged by 4, 22 and 28 days, as compared with treatments 70% FC, 60% FC, and 50% FC, respectively, and made F. arundinacea have the shortest time to wither in winter and to turn green in spring, with the longest green period. Taking water-saving and water use efficiency into consideration, 70% FC would be the optimum irrigation low limit from late autumn to early winter for F. arundinacea.
出处
《应用生态学报》
CAS
CSCD
北大核心
2012年第1期38-44,共7页
Chinese Journal of Applied Ecology
基金
国家环保公益性行业科研专项(200809047)资助
关键词
灌水下限
高羊茅
绿期
抗寒性
水分利用效率
irrigation low limit
Festuca arundinacea
green period
cold resistance
water use efficiency.
作者简介
刘立军，男，1984年生，硕士研究生．主要从事草坪草抗逆性研究．E-mail：liulj2014@Yahoo．cn
通讯作者．E-mail：chwf@sdau．edu．cn
