興海同德兩縣天然牧草營(yíng)養(yǎng)價(jià)值綜合評(píng)定及草地載畜量確定.pdf

1、青海大學(xué)碩士學(xué)位論文興海同德兩縣天然牧草營(yíng)養(yǎng)價(jià)值綜合評(píng)定及草地載畜量確定姓名：林莉申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：動(dòng)物營(yíng)養(yǎng)與飼料科學(xué)指導(dǎo)教師：劉書杰;吳克選20100401青海大學(xué)碩士論文 Abstract I A b s t r a c tA b s t r a c tIn this study，comprehensive nutritional value, the theoretical yield carrying capacity,

2、nutritional carrying capacity of 18 kinds of the main types of native grassland herbage were researched in Xinghai and Tongde county Hainan Prefecture of the Origin of Three Rivers. The results were as follows: (1) The r

3、ange of yield of fresh grass ,dry matter, edible grass and the production of DM were 91.33 g/m2～870.89 g/m2,36.13 g/m2～209.99 g/m2,4.64 g/m2～192.66 g/m2,32.66 g/m2～181.91 g/m2, respectively. (2) The conventional nutrient

4、s of 18 native grass pasture types indicated that the content of CP, EE, ADF, Ash, Ca and P were 8.59 %～13.57 %、1.47 %～4.23 %、25.54 %～40.84 %、3.23 %～8.73 %、0.11 %～0.78 %、0.05 %～0.26 %, respectively. The ratio of Ca / P w

5、as0.45：1～6.06：1, and the average content of conventional nutrients were 11.28 %、2.63 %、31.15 %、5.53 %、0.28 %、0.13 %, respectively. The average ratio of Ca / P was 2:1. (3) After fermentation of 18 types of native grass p

6、astures in vitro, 48 h gas production, dry matter digestibility were 47.26 ml～71.76 ml、51.14%～73.09%, based on the content of CP and EE, the values of OMD, DE and ME was estimated by 24 hours, which were 51.97 %～72.23 %、

7、9.69 MJ/kg～13.46 MJ/kg、 7.58 MJ/kg～11.15 MJ/kg. (4) Output of grassland nutrition: the nutrition range of output indicators of 18 types of native grass pasture: EDDM, DE, ME, CP, EE, ADF, Ash, Ca and P were 24.66 g/m2～14

8、4.82 g/m2, 0.42 MJ/m2～1.97 MJ/m2, 0.36 MJ/m2～1.61 MJ/m2, 3.63 g/m2～19.95 g/m2, 1.03 g/m2～6.50 g/m2,10.41 g/m2～75.41 g/m2, 1.26 g/m2～13.42 g/m2, 0.06 g/m2～0.80 g/m2, 0.02 g/m2～0.24 g/m2,respectively. (5) Comparative produ

9、ction carrying capacity and nutritional carrying capacity, nutritional carrying capacity are much larger than production carrying capacity ( the theoretical yield, DCP and ME average carrying capacity were 2.10 Sheep Uni

10、t/ha.、3.85 Sheep Unit / ha.、3.48 Sheep Unit/ha.,respectively ). In the actual use of the grass, we should combine with two kinds of calculation methods to evaluate the carrying capacity of native grass, which will help d

11、etermine a more reasonable pasture carrying capacity and effectively prevent degradation of natural grassland resources. Key Words: Xinghai Tongde Pasture types In vitro gas production Nutritive value evaluation