Abstract: The effects of applying boron(B), molybdenum(Mo) and zinc(Zn) mixed with nitrogen, phosphorus (P), and potassium (K)fertilizers on the yield and quality of alfalfa were gauged. The dry matter(DM) yield of alfalfa that had applied N, P and K fertilizers was higher than control, and the alfalfa's leaf stem ratio (L/S) was reduced, while its crude protein (CP) content did not change. The DM yield of alfalfa increased further with apt combination of B, Mo and Zn to the N, P, K fertilizers of appropriate proportions. Applying B (2.0 kg/h²)solely, or Zn(1.5 kg/h²) solely with N, P, K fertilizers to the alfalfa crop raised the DM yield notably (P<0.05); the increase was 29.0%, or 25.9%, respectively, than control. The rations of B, Mo and Zn applied influenced the crude protein content of hay of different cuttings. When only Zn was added to the N, P, K fertilizers, the crude protein content of hay tended to reduce, while only Mo was added, the hay's crude protein content tended to increase.

Key words: Grassland science, Alfalfa(Medicago sativa L.), Micronutrients, Macronutrients, Yield, Quality, Fertilization

摘要： 在氮磷钾肥料基础上,研究硼、钼、锌配施对紫花苜蓿草产量和品质的影响.结果表明:施氮磷钾肥可以提高苜蓿干草产量,降低叶茎比,但对其粗蛋白质含量的影响不大;在氮磷钾肥适量的基础上,硼、钼、锌合理配施可以增加苜蓿干草产量,其中单施硼(2.0kg/hm²)或锌(1.5kg/hm²)增产显著(P<0.0),分别较对照增产29.0%和2.9%;硼、钼、锌配施对各茬次粗蛋白质含量的影响不同;单施锌苜蓿粗蛋白质含量呈降低趋势,单施钼粗蛋白质含量呈增加的趋势.

关键词: 草原学, 紫花苜蓿(Medicagosativa L.), 微量元素, 大量元素, 产量, 品质, 施肥