摘要
通过额济纳荒漠绿洲草坪引种与建植试验，初步筛选出越冬保存率较高的草坪草１０个品种；优选出适于本区建植的草坪混播配方：草地早熟禾８０％＋高羊茅１０％＋紫羊茅１０％，其播量为１２～２４ｇ／ｍ２；草坪播种以春播为主。
The climate in the Ejin desert oasis is extremely arid, which has only 43 9 mm annual average precipitation, but over 3 413 1 mm evaporation. There, the annual average air temperature is 8 7℃, the highest and the lowest air temperature are 41 2℃ and -34℃ respectively, and the highest ground surface temperature rises over 70℃. So the land saline-alkalinization and land desertification develop violently. Soil for experiment is salinized meadow soil in which coarse grain (grain diameter between 0 25￣1 mm) consists 55 82%￣75 97% of all size grains, and organic matter content is 1 18%￣2 33% in 0￣20 cm layer. For establishing high quality greensward in such environment, experiment on species introduction has been conducted for two years. The 21 introduced species are all belong to cold tolerant types. The measured contents in experiment mainly include speeds of seedling growing and grassplot becoming, green period, pruned mass and survival rate after Winter. Meanwhile, greenswards under different mixed seeding formula and different seeding rate are evaluated according to survival rate, pruned mass and weeds proportion. The results are as follows: The seedlings of 21 introduced species all grow very slowly but with obvious difference 45 days after sowing. Viewed from individual growing height, Lolium L. and Tall festuca are fast growing type species, which followed by Agrostis L. and Poa L. in order. Relatively, the period of grassplot becoming are 45 days, 55￣60 days and 70￣90 days respectively. \ \ There are 13 species that have returned green after one winter with lowest air temperature of -30℃, in which only 10 species have longer green period. They are Kenturke, Wabash, Flyking, Hent, Nassan, Ikone, Hult, Snow of Poa L. as well as Tall festuce and Festuca rubra of Festuca L.. The survival rates after Winter of them are 45%￣95%. The last sifted out formula of greensward are that of Festuca L. as protection specie and Poa L. as edificator: Kenturke (80%)+ Tall festuce (10) + Festuca rubra (10). The principal sowing season is in Spring.
出处
《中国沙漠》
CSCD
北大核心
1998年第4期385-389,共5页
Journal of Desert Research
关键词
引种
草坪
荒漠绿洲
羊茅
Specices introduction\ Greensward\ Desert oasis
