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苜蓿是我国草食畜禽业和奶牛饲养业的主要饲草之一,在牧草产业化和人工草地建设中占有主要地位。在我国中北部大田条件下,每年可收获3~6茬,据推测各茬次产量呈逐渐降低的变化规律。试验简介苜蓿表现出的夏季衰退现象,分析受夏季衰退影响苜蓿产量和品质下降的诱因,提出减缓衰退现象的解决方法。
Alfalfa is one of the main forages in China’s grass-fed livestock and poultry industry and dairy farming industry, occupying a major position in the industrialization of forage grass and the construction of artificial grassland. Under the field conditions of central and northern China, it can be harvested 3 to 6 stubbles per year. It is presumed that the yield of each stubble gradually decreases. The experiment introduced alfalfa showed the summer recession phenomenon, and analyzed the reasons that the summer recession affected the yield and quality of alfalfa, and put forward the solution to alleviate the recession.