钠复合肥增强荒漠区梭梭抗旱性的研究

Sodium compound fertilizer improved drought resistance of Haloxylon ammodendron in desert area

本研究探讨了阿拉善右旗荒漠区梭梭(Haloxylon ammodendron)大田育苗时施用钠复合肥对植株生长及抗旱性的影响。与对照(不施任何肥料)和施NP肥(与钠复合肥等量的N、P)相比,施用钠复合肥的梭梭株高分别增加55%和77%,冠幅增加345%和229%,主茎直径增加57%和72%,主根直径增加63%和57%,主根长增加89%和51%,分枝数增加83%和99%,干质量增加343%和307%,植株地上部Na+浓度增加107%和110%,整株Na+含量增加80%和85%,K+含量差异不显著,而Na+/K+则提高79%和89%。以上结果表明,施用钠复合肥使得梭梭植株能够积累大量的Na+,增强其吸水能力,从而促进生长并提高其抗旱能力。

In this paper,the effects of sodium compound fertilizer on growth and drought tolerance of Haloxylon ammodendron seedlings in Alxa desert region,China,were investigated.Compared with control and N,P fertilizer,Na compound fertilizer increased plant height by 55% and 77%,crown diameter by 345% and 229%,main stem diameter by 57% and 72%,main root diameter by 63% and 57%,main root length by 89% and 51%,branch quantities by 83% and 99%,dry matter weight by 343% and 307%,shoot Na＋ content by 107% and 110%,whole plant Na＋ content by 80% and 85% and whole plant Na＋/K＋ by 79% and 89%,respectively;however,K＋ content maintained stable.Above interesting findings suggested that abundant Na＋ absorbed by root contributes to osmotic regulation and improved water uptake capability,hence growth and drought tolerance of H.ammodendron were improved by applying Na compound fertilizer.