干旱荒漠绿洲区重盐碱地底层衬膜隔盐效果与优质草坪建植研究

Effect of Understratum-Film on Saline Partition and Establishment of High Quality Turf in Heavy Saline-Alkali Field of Arid Hungriness Oasis Region

为解决河西走廊重盐碱地园林绿化难度大的问题,采用抬高坪床底层衬膜隔盐等技术措施,并结合客土法种植草坪。结果表明:抬高坪床底层衬膜隔盐,即便不换客土也能建植出优质草坪;客土而没有底层衬膜隔盐,虽然草坪苗期生长较好,但随后由于受地下盐分上升的影响,土壤含盐量逐渐上升,草坪质量随之下降;通过相关性分析,草坪质量的各项指标与土壤含盐量呈极显著负相关;因此,重盐碱地底层衬膜隔盐技术可以在干旱荒漠绿洲区农业生产中推广应用。

Hexi Corridor is located in the arid hungriness oasis region where soil salinization is very serious and results in the difficulties of turf establishment and gardening. In order to solve such problems, technologies of lifting turf bed and paving film at understratum in combination to soil replacement were adopted to establish turf. The results show that treatment of lifting turf bed and paving film at understratum without replacement soil led to good-quality turf establishment. The treatment of soil replacement without paving film at understratum maintained good turf quality at seedling periods, but turf quality declined gradually with the increased soil saline-alkali content from underground caused by the action of soil capillarity. The correlative analysis indicates that all turf quality indices had significantly negative correlation with soil saline content. Therefore, the technology of saline partition by paving understratum film in high saline-alkali lands should be broadly applied in agricultural activities in the arid hungriness oasis regions.