亚热带地区野生草地早熟禾夏季休眠特性研究

对4份草地早熟禾在亚热带地区的夏季休眠特性进行初步研究,结果表明:从生长速度、生物量、草坪质量等方面综合判断,不同草地早熟禾在夏季进入休眠的时间和程度不同,其中P07和PCK进入了完全休眠,休眠时间分别在7月27日和8月6日;P03仅进行了半休眠,时间为9月5日;P06在整个夏季都未进入休眠状态;休眠期草地早熟禾主要表现为:生长速度几乎停滞,生物量出现较大幅度程度的降低,草坪质量下降严重,并且出现较大的枯黄率;相关分析表明,生长速度、生物量、草坪质量是判断草地早熟禾夏季休眠的有效指标性特征.

Summer Dormancy in Wild Poa pratensis L. in Subtropical Regions

Summer dormancy in 4 Poa pratensis L.was studied in subtropical regions.As a result: 1) Estimating by the growth rate,biomass,turf quality and so on,the timing and degree of dormancy were different in Poa pratensis L.P07 and Pck were in complete dormancy,the timing of dormancy were on July 27th and June 8th respectively;P03 was in incomplete dormancy,the timing was on September 5th;P06 had no dormancy in the whole summer.2) In dormant period,Poa pratensis L.represented that cessation of growth,reduction of biomass,low turf quality and high rate of drying;3) The correlation indicated that growth rate,biomass and turf quality were the effective indexing characters for judging summer dormancy in Poa pratensis L.