不同氮肥和基质类型对匍匐翦股颖草坪质量的影响

为了更好地了解不同氮肥和基质类型对高尔夫果岭草坪质量的影响，在温室里模拟果岭用PVC管建造4种基质类型的匍匐翦股颖Agrostis stolonifera cv.Prenncross草坪，出苗后施用Hoagland和Arnon营养液培育至成坪，成坪后选用速效氮尿素和控释肥丁异叉双缩脲进行氮肥类型处理。试验结果表明，基质类型对匍匐翦股颖的生长和坪用质量有着显著影响并表现出阶段性差异。4种基质类型的草坪成坪速度快慢顺序为：土壤基质>改良沙基质>半改良沙基质>纯沙基质，这也是表层有机质累积量的大小顺序；外观质量高低为：改良沙基质>半改良沙基质>纯沙基质>土壤基质；在播种建坪的初期施用速效氮肥有助于匍匐翦股颖的生长和快速成坪；缓释氮肥释放速率慢，更符合草坪成熟后对氮的需求规律。缓释氮肥起效慢，应在草坪逐渐成熟时与速效氮肥搭配施用。

Effects of nitrogen fertilizer and base on turf quality of creeping bentgrass

Simulated greens were established with PVC pipes filled with four base mixutre in greenhouse in order to understand effect on of fertilizer and base on creeping bentgrass turf quality.The seed was sowed in PVC pipes,which was fertilized with Hoagland and Arnon nutrient solution until the stand formed,then half of the pipes were fertilized with water-soluble fertilizer Co(NH4)2] and the other half were fertilized with controlled released fertilizer(IBDU) at the same rate.Analysis of root depth and organic matter accumulation indicated that the main effect of base mixtures and nitrogen sources were significantly different.As a result,the establishment speeds of greens with four bases ranked as sandy loam soil base > fully amended sand > partially amended sand > pure sand.Organic matter accumulation speed showed the same trend.The surface layer quality of greens with four bases ranked as fully amended sand > partially amended sand > pure sand > sandy loam soil base.During the turf establishment,urea could help to promote growth and establishing speed.The IBDU released N slower than urea,which adapt to the nutrient requirement of creeping bentgrass growth after establishment.In addition,IBDU was insoluble and function slowly,and should be applied together with urea when turf matured.