对交替灌溉、改良型交替灌溉在大白菜上的应用效果进行了初步研究。试验结果表明,交替灌溉、改良型交替灌溉在比常规灌溉减少用水31.0～49.6m3/667m2的情况下,根系长度比常规管灌分别提高7.5%、9.9%,单株根干重提高26.5%、32.4%;水分生产效率提高19.4%、11.9%,差异达显著水平。采取交替灌溉技术,对大白菜的生育进程无影响,而植株的株高、叶片长势虽比对照略有降低,但差异不明显;收获时产量有所减少,但差异不显著。 The effects of alternate irrigation and improved alternate irrigation on Chinese cabbage were studied. The results showed that the root length of alternate irrigation and improved alternation irrigation were increased by 7.5% and 9.9%, and the root dry weight per plant increased by 26.5% and 31.0 ~ 49.6m3 / 667m2 respectively compared with conventional irrigation. 32.4%; water production efficiency increased 19.4%, 11.9%, the difference reached a significant level. Alternate irrigation technique had no effect on the growth of Chinese cabbage. However, the plant height and leaf growth of the plants were slightly lower than those of the control, but the difference was not obvious. The yield decreased at harvest, but the difference was not significant.