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Acta Prataculturae Sinica ›› 2015, Vol. 24 ›› Issue (10): 175-182.DOI: 10.11686/cyxb2014467

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Effect of phosphorus application under drip irrigation on the productivity and quality of alfalfa in Northern Xinjiang

ZHANG Fan-Fan1, YU Lei1, 2, *, MA Chun-Hui1, ZHANG Qian-Bing1, LU Wei-Hua1, 2   

  1. 1.College of Animal Science & Technology, Shihezi University, Shihezi 832000, China;
    2.Key Laboratory of Oasis Ecology Agriculture of Xinjiang Production & Construction Groups, Shihezi University, Shihezi 832000, China
  • Online:2015-10-20 Published:2015-10-20

Abstract: 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 under drip irrigation in oasis area of northern Xinjiang. Five fertilizer treatments were established, 180 kg/ha phosphate fertilizer (L1), 360 kg/ha phosphate fertilizer (H1), 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 varieties of alfalfa, this test adopts similar priority ratio analysis to synthesize each indicator. And then the rank of optimum pattern of phosphorus application is H1>L1>H2>L2>CK.