为提高滴灌条件下紫花苜蓿的生产性能及营养品质，对北疆绿洲区滴灌条件下两个品种紫花苜蓿开展施磷的研究。设置一次性施180 kg／hm2磷肥（L1）、一次性施360 kg／hm2磷肥（H 1）、分次施180 kg／hm2磷肥（L2）、分次施360 kg／hm2磷肥（H2）及不施肥（CK）5个处理，通过对其生产性能和营养品质进行测定。结果表明，不同施磷模式对新牧2号第1茬干草产量、生长速度、叶茎比及第3茬株高有显著影响（P ＜0．05），对三得利第3茬干草产量、生长速度有显著影响（P ＜0．05），对其余各生产性能相关指标均无显著影响（P ＞0．05）。不同施磷模式对新牧2号各茬次粗蛋白、粗纤维及第1茬粗灰分有显著影响（P ＜0．05），对三得利第1，3茬粗灰分有显著影响（P ＜0．05），对其余各营养品质相关指标均无显著影响（P ＞0．05）。采取模糊相似优先比分析法综合生产性能及品质的各项指标，得到新牧2号和三得利的最佳施磷模式，按优劣排序为 H 1＞L1＞H2＞L2＞CK。%In order to improve the productivity and nutritional value of alfalfa under drip irrigation,this study compared two varieties of alfalfa (Xinmu No.2,Sanditi)with different patterns of phosphorus application un-der drip irrigation in oasis area of northern Xinjiang.Five fertilizer treatments were established,180 kg/ha phosphate fertilizer (L1 ),360 kg/ha phosphate fertilizer (H 1 ),180 kg/ha phosphate fertilizer split application (L2 ),360 kg/ha phosphate fertilizer split application (H2 )and no phosphate fertilizer (control).The results show that different patterns of phosphorus application influence hay production,growth speed,leaf-stem ratio on first cut and plant height on third cut of Medicago sativa cv.Xinmu No.2 (P <0.05),and hay production and growth speed on third cut of M.sativa cv.Sanditi (P <0.05),and they have no significant influence on other indicators of productivity(P >0.05 ).And different patterns of phosphorus application influence crude protein and fibre on each crop time and crude ash on first cut of M.sativa cv.Xinmu No.2 (P <0.05),and crude ash on first and third cut of M.sativa cv.Sanditi (P <0.05),and they have no significant influence on other indicators of nutrition value (P >0.05).Application on each indicator of annual performance of two vari-eties of alfalfa,this test adopts similar priority ratio analysis to synthesize each indicator.And then the rank of optimum pattern of phosphorus application is H 1 >L1 >H2 >L2 >CK.
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