Growth Characteristics Of Trifolium Ambiguum And The Influencing Factors On Its Quality

Trifolium ambiguum is a superior legume forage, but its fertilization and feeding value were seldom studied in China. In order to improve the plantation and utilization range, this study consists of two aspects, including growth characteristics of fertilization and quality impacts of ensiling.T. ambiguum was used as material in fertilization experiment, including8treatments and4repetitions of single, combined and vacant additions of nitrogen, phosphorus and potassium fertilizers. After30days, the biological characteristics, leaf stem ratio, fresh and dry ratio, net photosynthesis rate, relative chlorophyll content, yield, and nutritional components of the herbage under different fertilization treatments were determined. In silage experiments, the clover was wilted and used as material at nutrition period after maturity. There were six treatments, composing of2cm,5cm cutting and untreated plants. Meanwhile, the clover was applied comparative trials of semi-dried, highly moist and the microbial starter additions, with9treatments and3repetitions. These materials were bagged, compacted, sealed and ensilaged. After45days, nutritional components, in vitro digestibility changes in the clover and silage were measured.Fertilization of nitrogen, phosphorus and potassium reduced the contents of NDF^ADF and Ash in the clover, and improved nutritional quality. Single fertilization of nitrogen fertilizer, phosphorus and potassium could affect the clover biological characteristics, enhancing photosynthesis and the growth potential. Combined fertilization of nitrogen, phosphate and potassium affected the plant chemical characteristics, reduced the transpiration, and enhanced water use efficiency. Plant cutting and microorganism starter adding reduced the fiber contents. The process of highly moist silage consumed nutrient content in the clover, and the dry matter digestibility in rumen was reduced. Plant cutting went against the forage DM and ADF digestibility in rumen. The external DM digesting rate of semi-dried ensiling was greater than the rate of highly moist ensiling. Microorganism starter improved the digestibility of DM and NDF in rumen.