引言大多数饲料作物的最佳营养时期在花期。当植株进入生殖生长阶段以后,随着营养体内的养分向籽实的转移,其营养水平大幅度降低,饲用价值降低,利用时间有很大局限性,在高温多雨的花期不易青贮或调制干草。为了保持或延长饲料作物的最佳营养期,延长供饲时间,使饲料营养体长期处于最佳营 Introduction Most forage crops have optimal nutrition at florescence. When the plant enters the stage of reproductive growth, with the nutrients in the body to the seed transfer, its nutritional level significantly reduced, lower feed value, the use of time is very limited, not easy to silage in the hot and rainy flowering or hay modulation. In order to maintain or prolong the best nutrition of the forage crops, extend the feeding time so that the fodder is at the best camp for a long time