灌水量对民勤干旱沙区骏枣生长和产量的影响

Effect of Irrigation Amount on Growth and Yield of Jujube in Arid Desert Area of Minqin

为民勤干旱沙区红枣栽培探索科学合理的灌溉制度,以4年生密植骏枣为研究对象,通过田间试验,研究生育期滴灌条件下充足灌水、80%轻度调亏、60%中度调亏和40%重度调亏4种灌溉措施对枣树生长和产量的影响。结果表明:在民勤干旱沙区,供水量在425.7~545.7 mm之间枣树均能正常生长,株高、新梢长和茎粗增量均随着灌水量的增加而增大;轻度调亏灌溉可提高骏枣果实的纵、横径和单果质量,产量增加7.8%,水分利用效率提高16.3%。采取轻度调亏灌溉措施可以有效提高民勤干旱沙区枣树产量和水分利用效率。

To explore a scientific irrigation system for the cultivation of jujube in arid desert area of Minqin,the effects of four irrigation measures(adequate irrigation, 80% mild regulated deficit irrigation, 60% moderate regulated deficit irrigation and 40% severe regulated deficit irrigation) on growth and yield of 4-year-old and densely planted jujube in the growth period were studied in field using drop irrigation. The results showed that the jujub trees could normally grow under water supply ranging from 425.7 to 545.7 mm, their plant height,shoot length and stem diameter increased with the increase of irrigation amount. Mild regulated deficit irrigation could improve the longitudinal diameter, transverse diameter and single fruit mass of jujube, increase the yield by 7.8% and the water use efficiency by 16.3%. Mild regulated deficit irrigation could effectively improve the yield and water use efficiency of jujube in arid desert area of Minqin.