Abstract: In order to solve the problem of turf establishment in soda-alkaline soil area,the study of growing grass and adding alkaline soil improvement materials (calciμm sulfate,hydrophobic materials (straw,lime,sand) and organic fertilizer) simultaneously was investigated under laboratory conditions to provide a theoretical basis for lawn production in alkaline soil area. After alkaline soil was added calcium sulfate and hydrophobic material (Straw,lime,sand) with applying organic fertilizer,a mixture of Tifdwarf Bermudagrass (Cynodon dactylon)，Tall fescue (Festuca elata Keng ex E. Alexeev) and Kentucky Bluegrass (Poa annua Linn) seeds was planted with plenty of water irrigation to achieve soil improvement and grass growing synchronously. The results showed that the pH,electrical conductivity and exchangeable sodium of alkaline soil decreased greatly after 28 days of grass growing，meanwhile soil microaggregates and other aspects had different changes. Adding calcium sulfate to alkaline soil decreased pH by 2.18 units at most,exchangeable sodium and alkalinity decreased by more than 90%，and soil saturated hydraulic conductivity increased. The effect of calcium sulfate on the growth of turfgrass in heavy soda-alkali soil was obvious,but the effect of organic fertilizer on the growth of turfgrass was not obvious. The results of this study provided a scientific basis for planting turfgrass in soda-alkali soil.

Key words: Alkaline soil, Improvement, Turfgrass, Calcium sulfate, Hydrophobic material, Straw

摘要： 针对苏打碱土区草坪建植困难，本文利用重度碱化苏打碱土加入硫酸钙、疏水材料(秸秆、石灰、沙子)和有机肥，研究实验室条件下种草生长与碱土改良同步进行的效果，为碱土地区草坪生产提供理论依据。在碱土中加入硫酸钙和疏水材料(秸秆、石灰、沙子)并混施有机肥后，播种矮生百慕大(Cynodon dactylon)、高羊茅(Festuca elata Keng ex E. Alexeev)和早熟禾(Poa annua Linn)混合种子，并用大量水淋洗，实现改良与生长同步。结果表明：经28 d生草后碱土pH值、电导率、交换性钠大幅降低，土壤微团聚体等方面均有所改变。碱土添加硫酸钙可使pH值最多下降2.18个单位，交换性钠及碱化度下降超过90%，土壤饱和导水率增加，结构明显改善，可满足草坪草的生长条件。硫酸钙改良重碱土对草坪草生长促进作用明显，加有机肥对生草促进作用不显著。本研究结果为利用苏打碱土种植草坪草提供了科学依据。

关键词: 碱土, 改良, 草坪草, 硫酸钙, 疏水材料, 秸秆