地膜覆盖对重度盐碱地土壤水盐状况及羊草移栽效果的影响

Effects of Plastic Film Mulching on Soil Water and Salt Status and Transplanting Effect of Leymus chinensis in Heavy Saline-alkali Land

在松嫩平原西部地区重度盐碱地上,连续2年研究了地膜覆盖措施对土壤水分、盐碱程度和移栽羊草成活率与生产力的影响。结果表明:地膜覆盖能够有效提高土壤含水量,降低土壤p H和电导率,尤其是对0~10 cm土壤水盐状况影响更为明显;经过2年试验后,与对照的羊草移栽零成活率相比,2017年地膜覆盖处理C、E和F样点羊草成活,同时各样点地膜覆盖处理生物量均显著或极显著高于对照。这说明地膜覆盖是改良重度盐碱化土壤的有效措施。

The effects of film mulching on soil moisture,salinity,survival rate of transplanting and productivity of Leymus chinensis have been studied for two years in the heavy saline-alkali soil of the Western Songnen Plain. The results showed that plastic mulching could effectively increase soil water moisture,and reduce soil pH and electrical conductivity. The effects of film mulching on 0 ~ 10cm soil water and salt status were especially more obvious. After two years of experiment,survival rate of C,E and F plots in the mulching treatment and biomass of different plots were significantly or extremely significantly higher than those of the ck in 2017,compared with the zero survival rate of the transplanting Leymus chinensis in ck. Therefore,plastic film mulching is an effective measure for the amelioration of heavy saline-alkali soil.