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在含氮量相同前题下，氮肥品种为硫酸铵、硝酸铰、尿素、磷酸氢二铵以及氮磷钾以Ｎ：Ｐ２Ｏ５：Ｋ２Ｏ＝５：３：２配施这５种肥料作为黑麦草的追肥材料，分析记录草坪草的叶绿素、密度、盖度、频度、分蘖数、越冬率、含Ｎ量、生长率，利用草坪质量品质评定方法及灰色系统理论中的关联分析方法进行分析评估，结果表明：ＮＰＫ配施草坪草达优等，氮肥品种中硝酸铵肥料肥效最好，尿素、磷酸氢二铵次之，硫酸铵最差。关键词：
Under the same nitrogen content, the five nitrogen fertilizers were N, P2O5: K2O = 5: 3: 2 as ammonium sulfate, nitrite hinge, urea, diammonium hydrogen phosphate and NPK as the ryegrass Topdressing materials, analysis and recording of chlorophyll, density, coverage, frequency, tillering number, overwintering rate, N content and growth rate of turfgrass, evaluation methods of quality and quality of turfgrass and correlation analysis method of gray system theory, The results showed that NPK combined with turfgrass reached the highest level, and the fertilizer with the best NH4NO3 fertilizer was the best in the nitrogenous fertilizer. Urea, diammonium hydrogen phosphate was the second, ammonium sulfate was the worst. Key words: