乙烯利、多效唑及修剪处理对盆播早熟禾的影响

为寻求减少草坪修剪次数以节约人力、物力的可行措施,本研究采用乙烯利和多效唑两种生长延缓剂对盆播早熟禾进行分别处理,并同时设修剪试验进行对照研究。结果是:在本试验所采取的剂量范围内,乙烯利使盆播早熟禾叶片枯死脱落,再生叶片窄小挺立,节间伸长和整株早衰;多效唑具有延缓盆播早熟禾生长的功能,且随着用量加大,延缓生长作用增强,多效唑还有使叶片变窄变小、绿色加深和更加鲜柔的作用。在本试验所选择的留茬高度和修剪频率条件下,修剪促进盆播早熟禾的生长,并抑制其分蘖和草皮层发育。与修剪试验对比,多效唑处理确可减少修剪次数。

RESPONSE OF POTTED FYLKING BLUEGRASS TO ETHEPHON, PP333 AND MOWING

For exploring the way of reducing the mowing frequency of lawn to save manpower and material resources, two growth retardants, ethephon and pp333, were adopted to treat potted Fylking bluegrass, and mowing trial was also done for comparison. The results of this study are as follows. The effects of ethephon (800 to 4000ppm) on potted Fylking bluegrass made the leaf blades withered and dropped, the regenerated leaf blades were narrower, smaller and stood upright, the stems elongated, the plants withered early. pp333 retarded the growth of potted Fylking bluegrass, and with increasing dose for the treatment the growth rate decreased more intensitively. In addition, pp333 also made the leaf blades narrower, smaller, greener and softer. Mowing accelerated the growth of potted Fylking bluegrass and retarded its tillering and sod developing. In comparison with mowing trial, pp333 can really reduce the mowing frequency of lawn.