Different Harvest And Drying Methods On The Pasture Wsc And Other Nutrients

Effect of Different Harvest Time and Drying Methods on Nutrient like WSC of Herbage Abstract The first-cut herbage of smooth bromegrass (Bromus inermis Leyss}. cocksfoot (Dactylis glomerata L.) ?. alfalfa (Medicago sativa L). erect milkvetch (A stragal us adsurgens Pall.)and coronilla (Coronilla varia L.) in animal science and technology testing station of Shanxi Agricultural University were selected to study the effect of different harvest time and drying methods on the content of water soluble carbohydrate and nutrient of herbage. Two grasses were harvested at jointing stage heading stage.. blooming stage and bearing stage, and the other three legume were harvested at offshoot stage bud stage-.. early flowering stage full flowering stage and seedpod stage. The four kinds of drying methods are oven-drying (65 0C ,12 hour)-. sunshine(5 day). oven-drying (65 0C ,12 hour)after sunshine 1 day and shade. And the samples of best use stage (heading stage of grasses and flowering stage of legume) was selected to study the rumen degradability with nylon bag technique. The results show as follow: (1) The content of CP and CA declined gradually with the passing of growth period, but contrary results appeared with NDF and ADF. In nutrition growth stage, the content of CP was higher than that of grasses, and NDF and ADF were lower, but the change speed of CP.. NDF and ADF in legume was compared rapid. The content of WSC of grasses was higher at heading and blooming stage. There was no correlation between the content of WSC and of CP in herbage. (2) As to dry methods, samples with oven-drying had the highest content of CP and WSC, and the content of NDF and ADF was minimum, and it is the best in the 4 kinds of drying methods, second was oven- drying after sunshine, shade ,and sunshine was the worst. (3) The degradability of DM, ADF, NDF and OM of the samples of oven-drying and oven-drying after sunshine were higher than that of sunshine and shade. (4) The degradability of DM, ADF, NDF and OM of herbage were higher significantly positively correlated with the WSC content of samples (P<0.0 1), correlation coefficient iS: 0.8758-.. 0.8753-. 0.9361 and0.9007, respectively. The regression equations were: P (DM) =l.4631X+55.545 rO.767 n20 P (OM) 4.6392X+52.163 r20.7661 n20 P (NDF) 4.155X+11.307 r20.8763 n20 P (ADF) =3.6518X+15.237r2=O.8112 n20...