Abstract: Eperimental plots were established using United States Golf Association specifications. An extreme vertex design was used with medium-coarse, very fine silt and clay, peat as mixing ingredients. Soil microbes (bacteria, fungi and actinomyces), enzyme activities, bermudagrass performances and mutual relationships were studied on six different newly established golf green rootzones mixtures. Results were as follows: the number of soil microbes and enzyme activities in newly established bermudagrass rootzone increased dramatically after planting, but were still obviously lower than the average level for natural soil. Microbial quantity, enzyme activity, biomass and visual turf quality in mixtures with peat were significantly higher than in pure sandy mixtures. There was a close relationship between pH value, the content of medium-coarse peat, microbial quantity, enzyme activities, and turfgrass performances. Increases of soil microorganisms and enzyme activities could promote the aboveground biomass, the total underground biomass, the underground biomass in 0～5 cm, 10～20 cm soil layers and the visual turf quality of turfgrass, but couldn't promote the underground biomass in 5～10 cm soil layers. The interaction between soil microbial and enzyme activities could improve turfgrass growth healthily.

Key words: Golf green rootzone mixtures, Microbial, Enzyme activity, Turfgrass performance, Relationships

摘要： 以中粗沙、极细沙和粉粘粒、泥炭为配材,采用极端顶点配方试验设计,参照美国高尔夫协会(USGA)规范建立高尔夫果岭试验小区,对6种不同配方土壤的微生物数量(细菌、真菌、放线菌)、酶活性、狗牙根(Cynodon dactylon)草坪性状及其相关关系进行研究,以了解不同基质对新建果岭土壤微生物、酶活性及草坪性状的影响。结果表明:新建狗牙根果岭成坪后微生物数量、酶活性均较植草前显著增加;含泥炭的基质中微生物数量和酶活性水平、地上地下生物量、草坪质量显著高于全沙基质(P<0.05)。中粗沙、泥炭的含量及pH值与微生物数量、酶活性和草坪性状关系密切。各种土壤微生物数量和酶活性的增加能促进新建高尔夫果岭草坪的地上、地下0～5 cm、10～20 cm及地下生物总量和草坪表观质量的增加,而对地下5～10 cm生物量的影响较小。土壤微生物和酶的共同作用能促进高尔夫果岭草坪健康生长。

关键词: 基质配方, 微生物, 酶活性, 草坪性状, 相关关系