Diet Composition Of Quasi-wild Elaphurus Davidianus In Milupark Of Beijing

The main methods are as follows,The field sample method is adopted to investigate relative aboundance of plants,food composition is determined by microhistological analysis from fecal samples,microscopic analysis is used to identify the food plants,the nutrient contents of main plant species grazed by Elaphurus davidianus were measeured by feed proximate analysis,The correlation and principal component analysis is used to discuss the foraging strategy of Elaphurus davidianus from January 2010 to December 2010 in milupark of Beijing,meanwhile,Try to apply the food preference evaluation to analyze the correlative factor of food preference of Elaphurus davidianus.The results are listed below.(1)Based on 8 piles of faeces and 19 categories of plantspecimen collected from milupark. We found that diet of Elaphurus davidianus belonged to 11 families and 19 species in the whole year. The results revealed that Medicago sativa, Setaria, Amaranthus viridis, Lolium perenne were staples of the Elaphurus davidianus in spring. The percentages of the above items in the diet were 4.03%,11.87%,9.51%,8.13% respectively. Medicago sativa., Setaria, others, Amaranthus viridis were staples of the Elaphurus davidianus in summer. The percentages of the above items in the diet were 27.61%,15.45%,11.82%,8.07% respectively. Medicago sativa, Artemisia spp.,Setaria, Lolium perenne were staples of the Elaphurus davidianus in autumn The percentages of the above items in the diet were 22.57%,12.55%,11.26%,11.17% respectively. Medicago sativa, Setaria, Artemisia spp., Amaranthus viridis L.were staples of the Elaphurus davidianus in winnter. The percentages of the above items in the diet were 17.16%,14.48%,13.63%,13.19% respectively.(2)The results of nutriellt contents showed that Medicago sativa, Oxalis corniculata, Setaria andAgrostis stolonifera have high water content of main plants during the year. The percentages of the above items are11.68%,11.43%,11.35%,11.35%. Hemisteptalyrata, Chenopodium album, Setaria, Agrostis stolonifera have tall contains calcic amount of main plants during the year.The percentages of the above items are34.00%,6.15%,4.28%, 4.23%.Orychophragmus violaceus, Chenopodium album, Physalis alkekengi andRubia cordifolia have high phosphorus content of main plants during the year.The percentages of the above items are 1.74%,1.68%,1.63%,1.60%.Lactuca indica, Oxalis corniculata, Brassicaceae and Orychophragmus violaceus have high Calorific Power of main plants during the year.The percentages of the above items are 29.49%,28.93%,25.58%,25.13%.Agrostis stolonifera, Portulaca,Lepidium apetalum and Brassicaceae have high NDF of main plants during the year.The percentages of the above items are 48.23%,43.88%,39.43%,39.14%.Setaria, Digitaria, Chenopodium album and Artemisia spp. have high ADF of main plants during the year.The percentages of the above items are 66.53%,66.44%,54.90%,47.09%。(3)Resuits from food Preference index indicate that Elaphurus davidianus has distinct food Preference to certain extent. The analysis showed that the relative aboundance and the nutrition constituent are the most important factors determining the feeding of Elaphurus davidianus...