三江源区嵩草草地枯草期牧草营养价值评定及载畜量研究

›› 2013, Vol. 21 ›› Issue (1): 56-64.

三江源区嵩草草地枯草期牧草营养价值评定及载畜量研究

郝力壮^1,2,3, 王万邦^1,2,3, 王迅^1,2,3, 张晓卫^1,2,3, 赵月平^1,2,3, 崔占鸿^1,2,3, 刘书杰^1,2,3

1. 青海省高原放牧家畜营养与生态国家重点实验室培育基地青海省高原放牧家畜动物营养与饲料科学重点实验室, 青海西宁 810016;
2. 青海高原牦牛研究中心, 青海西宁 810016;
3. 青海大学畜牧兽医科学院, 青海西宁 810016

收稿日期:2012-09-06 修回日期:2012-11-05 出版日期:2013-02-15 发布日期:2013-02-27
通讯作者: 刘书杰
作者简介:郝力壮(1984-),男,河北隆尧人,助理研究员,硕士,从事放牧家畜营养生态研究,E-mail:lizhuanghao1122@foxmail.com;
基金资助:
国家科技支撑计划(2009BAC61B03-1,2012BAD13B01);三江源专项科研资金项目(2010-N-S05);国家重点基础研究发展计划(973项目)(2012CB722900-6);青海省重大科技攻关项目(2005-SN-2)资助

Evaluation of Nutritional Value and Carrying Capacity of Kobresia Grassland during the Period of Withered Grass in Sanjiangyuan Region

HAO Li-zhuang^1,2,3, WANG Wan-bang^1,2,3, WANG Xun^1,2,3, ZHANG Xiao-wei^1,2,3, ZHAO Yue-ping^1,2,3, CUI Zhan-hong^1,2,3, LIU Shu-jie^1,2,3

1. Province-Ministry Co-constructing State Key Laboratory Cultivation Base of Plateau Grazing Animal Nutrition and Ecology/Key Laboratory of Plateau Grazing Animal Nutrition and Feed Science in Qinghai Province, Xining, Qinghai Province 810016, China;
2. Qinghai Plateau Yak Research Center, Xining, Qinghai Province 810016, China;
3. Academy of Animal and Veterinary Science of Qinghai University, Xining, Qinghai Province 810016, China

Received:2012-09-06 Revised:2012-11-05 Online:2013-02-15 Published:2013-02-27

摘要/Abstract

摘要： 为探究三江源区枯草期嵩草(Kobresia)草地营养供给潜力和载畜量,采用概略养分分析法和体外产气法,结合产草量对枯草期牧草综合评定并确定其载畜量。结果表明:可食产草量为64.14 g·m^-2;以风干样为基础测定的水分、灰分(Ash)、钙(Ca)、磷(P)、钙磷比(Ca/P)、粗纤维(CF)、酸性洗涤纤维(ADF)、中性洗涤纤维(NDF)、粗脂肪(EE)和粗蛋白(CP)分别为7.16%,5.66%,1.13%,0.04%,38.47,28.41%,44.31%,63.33%,2.32%和3.37%;体外发酵pH和氨氮浓度均在正常范围内,体外干物质消化率(IVDMD)、消化能(DE)和代谢能(ME)为36.10%,4.50 MJ·kg^-1和2.92 MJ·kg^-1;水分,Ash,Ca,P,Ca/P,CF,ADF,NDF,EE和CP输出量分别为:4.62 g·m^-2,3.59 g·m^-2,0.79 g·m^-2,0.02 g·m^-2,42.51,19.37 g·m^-2,28.46 g·m^-2,39.25 g·m^-2,1.42 g·m^-2和2.35 g·m^-2;数量载畜量、可消化蛋白(DCP)载畜量和ME载畜量分别为1.06, 0.37和0.74 SU·hm^-2。研究证实嵩草草地空间异质性大,牧草中P和CP严重匮乏,营养成为限制家畜生产的关键因素。

关键词: 牧草, 嵩草草地, 营养价值, 载畜量

Abstract: In order to know the potential ability and carrying capacity of Kobresia grassland during the withered grass period for Sanjiangyuan Region, nutritional value and carrying capacity are evaluated by approximate analysis method and in vitro gas production methods combined with grass production. Results indicate that edible grass production is 64.14 g穖^-2. The water, Ash, Ca, P, Ca/P, CF, ADF, NDF, EE and CP contents of air-dry grass samples are 7.16%, 5.66%, 1.13%, 0.04%, 38.47, 28.41%, 44.31%, 63.33%, 2.32% and 3.37%, respectively. The pH value and NH₃-N concentration of fermented grass in vitro are normal. IVDMD, DE and ME are 36.10%, 4.50 MJ穔g^-1 and 2.92 MJ穔g^-1, respectively. The yield of water, Ash, Ca, P, CF, ADF, NDF, EE and CP are 4.62, 3.59, 0.79, 0.02, 19.37, 28.46, 39.25, 1.42 and 2.35 g穖^-2, respectively. Quantity, DCP and ME carrying capacities are 1.06, 0.37 and 0.74 SU穐m^-2, respectively. This research validates that there is obvious spatial heterogeneity about the Kobresia grassland. Phosphorus and crude protein contents of the grassland are severely deficient. Therefore, nutrition is a key restricted factor for grazing livestock in this area.

Key words: Grass, Kobresia grassland, Nutritional value, Carrying capacity

中图分类号:

S816.15
S812

郝力壮, 王万邦, 王迅, 张晓卫, 赵月平, 崔占鸿, 刘书杰. 三江源区嵩草草地枯草期牧草营养价值评定及载畜量研究[J]. , 2013, 21(1): 56-64.

HAO Li-zhuang, WANG Wan-bang, WANG Xun, ZHANG Xiao-wei, ZHAO Yue-ping, CUI Zhan-hong, LIU Shu-jie. Evaluation of Nutritional Value and Carrying Capacity of Kobresia Grassland during the Period of Withered Grass in Sanjiangyuan Region[J]. , 2013, 21(1): 56-64.

参考文献

[1] 青海省植被编写委员会. 青海省植被[M]. 西宁:青海人民出版社,1994:67-94
[2] 三江源自然保护区生态环境编辑委员会. 三江源自然保护区生态环境[M].西宁:青海人民出版社,2002:103-106
[3] 青海三江源自然保护区生态保护和建设总体规划实施工作领导小组办公室.青海三江源生态保护和建设工程必读[M].西宁:青海省三江源办公室,2007:7-8,35-63
[4] 王堃,洪绂曾,宗锦耀. "三江源"地区草地资源现状及持续利用途径[J]. 草地学报,2005,13(S):28-31,47
[5] 任继周. 草业科学研究方法[M]. 北京:中国农业出版社,1998:1-2
[6] 张丽英. 饲料分析及饲料质量检测技术[M].2版. 北京:中国农业大学出版社,2003:45-80,131-138
[7] Menke K H, Steingass H. Estimation of the energetic feed value obtained from chemical analysis and in vitro gas production using rumen fluid [J]. Animal Research and Development,1988,28(7):47-55
[8] Menke K H, Raab L, Salewski A, et al. The estimation of the digestibility and metabolizable energy content of ruminant feedstuffs from the gas production when they are incubated with rumen liquor in vitro[J]. The Journal of Agricultural Science,1979,93(1):217-222
[9] 冯宗慈,高民.通过比色法测定瘤胃液氨氮含量方法的改进[J].内蒙古畜牧科学,1993(4):40-41
[10] 林莉. 兴海同德两县天然牧草营养价值综合评定及草地载畜量确定[D]. 西宁:青海大学,2010:13-14
[11] 郝力壮,刘书杰,吴克选,等. 玛多县高山嵩草草地型天然牧草营养价值评定与载畜量研究[J]. 中国草地学报,2011,33(1):84-89
[12] 杨允菲,祝廷成. 植物生态学[M]. 北京:高等教育出版社,2011:70-79
[13] 任继周. 草业科学研究方法[M]. 北京:中国农业出版社,1998:128
[14] Mcdonald P, Edwards R A, Greenhalgh J F D, et al. 动物营养学[M]. 王九峰,李同洲,译. 北京:中国农业大学出版社,2007:81-84
[15] Satter L D, Slyter L L. Effect of ammonia concentration on rumen microbial protein production in vitro[J]. British Journal of Nutrition,1974,32(2):194-208
[16] 严学兵,郭玉霞,周禾,高寒牧区河漫滩草地生产力的评定[J].家畜生态,2003,24(3):10-13
[17] 海存秀.利用体外产气法评定青海高原天然牧草营养价值的研究[D].西宁:青海大学,2007:12-13
[18] 郝力壮.三江源区果洛州主要草地类型天然牧草营养价值的综合评定[D].西宁:青海大学,2009:37-39
[19] 洪金锁.三江源区玉树州主要草地类型天然牧草营养价值的综合评定[D]. 西宁:青海大学,2009:32-33
[20] 崔占鸿,刘书杰,柴沙驼,等.体外产气法评价青海高原补饲草料与天然草地牧草组合效应[J].草地学报,2011,19(6):988-994
[21] Jung H G, Allen M S. Characteristics of plant cell walls affecting intake and digestibility of forage by ruminant[J]. Journal of Animal Science,1995,73(9):2774-2790
[22] Allen M S. Physical constraints on voluntary intake of forages by ruminants[J]. Journal of Animal Science,1996,74(12): 3063-3075
[23] 夏冬华.秸秆专用添加剂与制粒对绵羊利用玉米秸秆日粮的影响[D].乌鲁木齐:新疆农业大学,2004:2-3
[24] Russell J B, O’Connor J D, Fox D G, et al. A net carbohydrate and protein system for evaluating cattle diets.Ⅰ. Ruminal fermentation[J]. Journal of Animal Science,1992,70(11):3551-3561
[25] Sniffen C G, O’Connor J D, Van Soest P J, et al. A net carbohydrate and protein system for evaluating cattle diets. Ⅱ. Carbohydrate and protein availability[J]. Journal of Animal Science,1992,70(11):3562-3577
[26] Xue B, Zhao X Q, Zhang Y S. Seasonal changes in weight and body composition of yak grazing on alpine-meadow grassland in the Qinghai-Tibetan plateau of China[J]. Journal of Animal Science,2005,83(8):1908-1913
[27] 李博,杨持,林鹏. 生态学[M].北京:高等教育出版社,2000:15
[28] 戈峰. 现代生态学[M]. 2版.北京:科学出版社,2008:182-206
[29] Hobbs N T, Swift D M. Estimates of habitat carrying capacity incorporating explicit nutritional constraints[J]. Journal of Wildlife Management,1985,49(3):814-822
[30] 孟林,张英俊. 草地评价[M].北京:中国农业科学技术出版社,2010:142-179,196-218