巴林右旗干草原主要牧草的营养成分季节动态与饱和链烷烃组成结构的研究  

The seasonal nutritional dynamics of major forages composition of the steppe of Bahrain Right Banner and its forming structure of the saturated chain alkane research

作　　者：李宝栋[1,3] 邓宇 孙海洲[2] 赵瑞霞 萨其仍贵[1] 李晓燕[1] 红敏[1] 桑丹[2] 张春华 任晓萍 LI Bao-dong;DENG Yu;SUN Hai-zhou;ZHAO Rui-xia;SA Qi-reng-gui;LI Xiao-yan;HONG Min;SANG Dan;ZHANG Chun-hua;REN Xiao-ping(Academy of Agriculture and Animal Husbandry in Chifeng,Chifeng 024031,China;Inner Mongolia Academy of Agriculture and Animal Husbandry,Hohhot 010031,China;Inner Mongolia Huangyangwa Grass Industry Co.,Ltd,Chifeng 024300,China)

机构地区：[1]赤峰市农牧科学研究院,内蒙古赤峰024031 [2]内蒙古自治区农牧业科学院,内蒙古呼和浩特010031 [3]内蒙古黄羊洼草业有限公司,内蒙古赤峰024300

出　　处：《草业学报》2019年第12期159-168,共10页Acta Prataculturae Sinica

基　　金：国家公益性行业(农业)科研专项(201303062);国家绒毛用羊产业技术体系建设项目(CARS-39-11);内蒙古农牧业科学院青年创新基金项目(2015QNJJM15)资助

摘　　要：通过测定10种牧草5月至翌年1月的7种常规营养成分含量及其中8种牧草7和10月的8种饱和链烷烃浓度,对巴林右旗典型干草原的主要牧草的营养成分季节变化规律和同一季节饱和链烷烃组成差异进行了研究。结果表明,多数草样的粗蛋白含量5月到翌年1月逐季显著降低(P<0.05),Ca含量10月最高(P<0.01),总磷(TP)含量5月最高(P<0.01),中性洗涤纤维与酸性洗涤纤维含量极显著正相关(P<0.01),Ca与TP含量极显著负相关(P<0.01);7、10月,多数草样的C 29、C 31饱和链烷烃浓度极显著(P<0.01)高于其余的6种饱和链烷烃,其饱和链烷烃组成结构的主成分值Z 1、Z 2的差异显著(P<0.05)。上述研究表明,巴林右旗干草原的主要牧草的蛋白质逐季减少且钙磷含量彼此反向变化,需对家畜及时补饲,其饱和链烷烃组成差异明显,通过链烷烃技术估测放牧家畜采食结构可行。Seven conventional nutrient analyses were conducted monthly for 10 forage species in the typical steppe grassland of Bahrain Right Banner from May to the following January,and concentrations of 8 saturated chain alkane compounds from eight of the forage species were measured in July and October,to study the seasonal changes in grassland feed quality.It was found that across the May-January period studied,crude protein(CP)content decreased significantly(P<0.05)quarter by quarter,in most of the species measured.The calcium content peaked(P<0.01)in October,and total P(TP)content was highest(P<0.01)in May.The acid detergent fiber(ADF)content was highly correlated with the neutral detergent fiber content(NDF)(P<0.01),while Ca content displayed an extremely negative correlation with TP content(P<0.01).In July and October,the concentrations of C 29 and C 31 saturated chain alkanes were much higher(P<0.01)in most grass samples,than the other six saturated chain alkanes measured.On principal component analysis of the data,Z 1 and Z 2 which were the principal component scores reflecting the saturated chain alkane composition were significantly different(P<0.05).For the major forage species in the steppe grassland of Bahrain Right Banner,the above data showed that supplementary feeding would be required by livestock as the CP decreased in late season,seasonal trends in herbage calcium and phosphorus contents were opposite,and the nutritional value of herbage for grazing livestock could also be estimated by the paraffin determinations as the contents of the various saturated chain alkanes in these forages showed seasonal variation parallel to that of the nutritional parameters.

关 键 词：干草原 营养成分 饱和链烷烃 相关性 主成分分析 

分 类 号：S81[农业科学—畜牧学]