جستجوی مقالات مرتبط با کلیدواژه « چین » در نشریات گروه « علوم دام »

In order to investigate effect of cutting on chemical composition and degradability parameters of sorghum silage an experiment was don. Sorghum forage was used from first and second cutting for ensiling. Ensiling was done in plastic buckets (2.5 kg weight) for 80 days. The result showed that dry matter, neutral and acid detergent fiber in silage of second cutting was higher (P

This experiment was conducted to study the yield performance, chemical compositions, mineral contents and in vitro ruminal fermentation parameters in leaves and stem of Hamedani alfalfa during three consecutive cuttings (harvested at early bloom). Chemical composition and parameters of in vitro gas production of stem and leaves were seperately measured using standard procedures. The lowest crud protein (CP) content of leaves and stem was observed at the second cutting and the highest CP values were recorded at the third cutting (p<0.05). Also, at the second cutting the greatest values of neatural detergent fiber (NDF) was noted in stem, whereas the amount of this parameter for leaves was observed at third cutting(p<0.05). With the increasing number of cuttings the iron, copper and manganese content of stem decreased (P<0.05). The phosphorus content of stem was highest at the second cutting, while zinc had the highest concentration at the first cutting (P<0.05). There was an increment in iron content of leaves due to the numbers of cutting; however other minerals widely fluctuated over cuttings. The lowest organic matter digestibility of stem was observed at the second cutting, and highst value for leaves was seen at the third cutting (P<0.05). At the third cutting the highest value of NDF digestibility and metabolizable energy of leaves were observed, while the recorded value of microbial mass and partitioning factor were maximum at the second cutting. Overall, the result of this study showed that the quality of tested alfalfa was in the order of second cutting>third cutting> first cutting.