Abstract: Studies were conducted for one year at Fishlike mountain Farm, Chengde District to de-temine the effect of nitwn, phosphate, potassiurn fertilizer and clipping boency on the yteld of hay ofRussian wilthe grass.Mathemaics medels were established for yield with the betments of N, P, K fertil-izer and clipping frequency in this paper.The dynamic relationship between enyriment factors and vieldwere analyzed by computer and showed by graphs.The results show that:There are interactions among thenitrogen, phosphae, potassiurn fertilizer and clipping boency.The interactions between nitrogen andphosphate fertilizer, nitrogen fertilizer and clipping frequency are large.The interaction between potassiumfertilizer and clipping times is small.The best combine of nitrogrn, phosphate, potassium fertilizer andclipping boency are nitrogen 312kg, phosphate 171kg, potassiurn 125kg, clipping 2 times per hectareper year.The frequency analysis method gives the manipulation of which can keep yield of Russianwildrye grass in a given level.

Key words: Russian wildrye grass, Nitrogen, phosphate, potassium fertilizers, Clipping frequency, Yield

摘要： 本文研究氮肥、磷肥、钾肥和刈割次数的交互作用与新麦草人工草地产草量的动态关系。结果表明,氮肥、磷肥、钾肥和刈割次数间存在-定的交互作用。其中以氮肥与磷肥、氮肥与刈次间的交互作用较大;而钾肥与刈次间的交互作用较小。在试验范围内,氮肥、磷肥、钾肥和刈次的最佳组合为：每公顷施氮312千克,磷171千克,钾125千克,刈割2次。利用频数分析法给出产草量维持在-定水平的具体调控措施。

关键词: 新麦草, 氮磷钾肥, 刈割次数, 产草量