Studies On The Nutrition Feature Of Parthenocissus Quinquefolia

Feeding value of Parthenocissus quinquefolia was evaluated in four aspects, namely chemical composition , digestion of green leaves, digestion of fallen leaves and degradability of proteins in the rumen of sheep fed or not fed Parthenocissus quinquefolia.The nutrient components of two varieties of Parthenocissus quinquefolia (big leaves CV1 and small leaves CV2) were compared in Experiment 1, and the nutrient distributive pattern at different sections of Parthenocissus quinquefolia and the changes of tannin contents in different seasons were studied. The results showed that the nutritional value of CV1 was higher than CV2 on DM basis. The crude protein contents of CV1 and CV2 were 18.05% and 16.15%,respectively. CV1 was more suitable for feeding sheep than CV2 because of lower tannin contents in CV2 changing from 1.5% to 4.5% with different seasons.Four healthy sheep were used in Experiment 2. The digestibility, digestible energy, voluntary feed intake (VFI) and efficiency of microbial protein production(EMP) were analyzed. The results showed that the feeding value of CV1 was higher than CV2. Its dry matter digestibility and digestible energy were 70.51% and 12.68MJ/Kg, respectively, VFI was 31.71g/kg(DM/BW), EMP was 18.51 g/kg(N/DOMI) and the rumen microbial production under the free feeding condition was 0.95g/kg d(N/d W0.75).Feeding values of four rough feeds including the fallen leaves of CV1, dry hays, corn straws and Zhuo leaves were compared in Experiment 3 using Latin square design with four healthy sheep used. The crude protein content of the fallen leaves of CV1, digestibility , digestible energy and the rumen microbial product under the free feeding condition were 7.57%, 46.11% , 7.20MJ/kg and 0.63g/d (N/W0.75), respectively. The digestible energy intake of sheep fed the fallen leaves of CV1 and dry hays did differ significantly(P>0.05); Rumen microbial production was lower than dry hays but higher than corn straws(P<0.05). CV1 may be used as rough feeds of sheep.Three sheep fitted with permanent rumen cannulas were fed alfalfa + corn straw, green Parthenocissus quinquefolia + corn straw and fallen Parthenocissus quinquefolia + alfalfa . The PH value and NH3-N concentration in the rumen and degradation of fish meal, soybean meal and rapeseed meal in the rumen of sheep fed on different diets were analyzed. The PH value of sheep fed on green Parthenocissus quinquefolia + corn straw was significantly higherthan on other two diets, but NH3-N concentration was significantly lower. The protein degradation in the rumen of sheep fed on green Parthenocissus quinquefolia + corn straw and fallen Parthenocissus quinquefolia + alfalfa were lower than on alfalfa + corn straw diet. Parthenocissus quinquefolia can protect protein against degradation by the rumen microbes. Whether the protein connected with tannin can be digested after the rumen need be further studied.Parthenocissus quinquefolia has become the pioneer plant used for greenizing, and its value need be widely studied. The feeding value of Parthenocissus quinquefolia was widely evaluated in the study that also provided theoretical basis for using Parthenocissus quinquefolia as rough feeds of ruminant. The value of Parthenocissus quinquefolia during grazing and its suitable ratio in the mixed feeding or cropping system still need be further studied.