【摘要】 以5年生苜蓿为试验材料,研究了苜蓿单作、苜蓿/玉米间作和苜蓿/燕麦草间作条件下苜蓿产量、叶片氮含量以及光合特性,为探讨缓解苜蓿产量退化提供理论依据和方法。结果表明,2种间作模式下的苜蓿产量均显著高于单作苜蓿产量,苜蓿/燕麦草间作模式下苜蓿产量最高。2种间作模式均能显著提高苜蓿叶片氮含量,有效提高光合能力。因此,间作模式可以有效防止5年生苜蓿产量退化,在农牧地区具有可行性。更多还原

【Abstract】 5-year-old alfalfa was used as test material. Yield, leaf nitrogen content and photosynthetic characteristics of alfalfa in alfalfa monoculture, intercropping of alfalfa and maize, intercropping of alfalfa and oat were studied,so as to provide theoretical basis and method for effectively improving the productivity of degraded alfalfa. The results showed that the yields of alfalfa in two intercropping patterns was significantly higher than that in alfalfa monoculture. Yield of alfalfa in intercropping pattern of alfalfa and oat was the highest among them. Two intercropping patterns both significantly improve the leaf nitrogen content and photosynthetic capacity of alfalfa,and in conclusion, intercropping effectively prevent degradation of 5-year-old alfalfa. These intercropping patterns are feasible in farming-pastoral areas.更多还原