Effects Of Field Modulation Technology On Drying Rate And Nutritional Quality Of Alfalfa

Natural drying technology is still the main measure for alfalfa hay production in the main producing areas of Alfalfa in China.The technology is not only low in production cost,but also simple and easy to operate.However,the natural drying technology of alfalfa hay still has some problems,such as slow drying rate relatively,serious loss of leaf abscission and poor quality of hay.In order to make the alfalfa dry rapidly in natural drying process and reduce the loss of alfalfa during drying in the field.In this experiment,"WL232HQ" alfalfa was used as the test material to explore the effects of 3 key factors on the drying rate,the leaf stem ratio and the main nutritional quality of the field Alfalfa during the drying process,including the height of stubble,the thickness of grass strip and the times of exposuring.In this study,second stubble and third stubble of alfalfa cutting were studied,and 3 factors were designed for 3 levels by single factor test and orthogonal test.The following conclusions were obtained:(1)The shortest drying time is that the height of stubble is 8 to 11 cm,the thick of mower is 10 cm,and the tedding is 2.(2)With the height of stubble boosting,the CP and RFV were increasing,and the ADF and NDF were decreasing,gradually.With the thick of mower enhancing,the CP,RFV ADF and NDF were fluctuations.With the tedding increasing,the CP and RFV increased at first and then decreased,but the ADF and NDF were opposite.(3)The CP and RFV were highest than other treatments when the height of stubble is 8 to 11 cm,the thick of mower is 20 cm,and the tedding is 1.(4)Consequently,the best condition for hay-making was the height of stubble is 8 to 11 cm,the thick of mower is 20 cm,and the tedding is 1.The drying time was shorter and the quality was better than other treatments with this condition.