保水剂对土壤含水量及黑麦草种子萌发的影响

目的]研究不同基质中添加不同剂量保水剂对土壤总含水量及黑麦草种子萌发的影响,以期为节水栽培提供理论依据。方法]在自然光照和遮阴条件下,比较添加不同剂量保水剂(0、3、6、9 g/m2)的基质对土壤总含水量及黑麦草种子萌发的影响。结果]保水剂在不同基质中对提高土壤总含水量和种子发芽率的影响效果由大到小依次为混合土、营养土、黄土。在保水剂施用量为6 g/m2、土壤基质为混合土时,土壤总含水量最大,黑麦草种子发芽率最高。结论]保水剂的施用对不同基质的土壤总含水量和黑麦草种子发芽率影响效果显著,以土壤基质为混合土、保水剂施用量为6 g/m2时效果最佳。

Effects of Water Retaining Agent on Total Soil Moisture Content and Seed Germination of Perennial Rye-grass

Objective] To research the effects of water retaining agent on seed germination and growth of perennial rye-grass and total soil mois-ture content, and to provide theoretical basis for the water-saving cultivation. Method] Under the condition of natural light and shading condi-tion, we compared the effects of different dosages of water retaining agents (0, 3, 6, 9 g/m2 ) on the seed germination growth and matrix water-holding capacity. Result] Effects of water retaining agent in different substrates on enhancing soil moisture content and seed germination rate were in the order of composite soil >nutrient soil >loess.When the application dosage of water retaining agent was 6 g/m2 , moisture content of composite soil was the greatest.Germination rate of rye-grass was the maximum.Conclusion] The application of water retaining agent has sig-nificant effects on the total soil moisture content of different substrates and seed germination of perennial rye-grass, and the effect is the best when the soil matrix is composite soil with 6 g/m2 water retaining agent.