【摘要】 试验用3种植物生长延缓剂(多效唑、烯效唑、缩节胺)及其两两组合对留茬4,6和8cm的多年生黑麦草德比Loliumperennecv.Derby进行喷施试验,结果表明,留茬6cm时,多年生黑麦草在-20和50℃时的电解质相对外渗率较低,可溶性糖含量较高,其抗寒性和抗热性能比留茬4和8cm强。各植物生长延缓剂处理可有效增强多年生黑麦草的抗寒性和抗热性。更多还原

【Abstract】 The electric conductivity rate on -20 ℃ and 50 ℃ of perennial ryegrass under mowing with 6 cm stubble treatment were lower while dissoluble sugar content were higher than that of 4 cm and 8 cm stubble. The drought resistance and cold resistance of the 6 cm stubble treatment were better than that of 4 cm and 8 cm. Plant growth retardants improved drought resistance and cold resistance of perennial ryegrass.更多还原