Acta Agrestia Sinica

›› 2001, Vol. 9 ›› Issue (3): 165-170.DOI: 10.11733/j.issn.1007-0435.2001.03.002

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Accumulation of Biomass and Nutrient Material of Aohan Alfalfa in Kerqin Sand

SUN Qi-zhong1, HAN Jiang-guo2, GUI Rong1, LIU Guo-rong3   

  1. 1. Grassland Research Institute, CAAS, Huhhot, Inner Mongolia, 010010, China;
    2. Institute of Grassland Science, China Agricultural University, Beijing, 100094, China;
    3. Chifeng Grassland Station, Chifeng, 024000, China
  • Received:2001-01-11 Revised:2001-05-10 Online:2001-08-15 Published:2001-08-15

科尔沁沙地敖汉苜蓿地上生物量及营养物质累积

孙启忠1, 韩建国2, 桂荣1, 刘国荣3   

  1. 1. 中国农业科学院草原研究所, 呼和浩特, 010010;
    2. 中国农业大学草地研究所, 北京, 100094;
    3. 赤峰市草原站, 赤峰, 024000
  • 作者简介:孙启忠(1959- ),男,副研究员,中国农业大学草地所在读博士生,主要从事牧草生产及草地改良方在的研究,发表论文十余篇
  • 基金资助:
    国家“九五”科技攻关96-016-01-04专题研究内容

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Abstract: Alfalfa(Medicago sativa L.cv.Aohan)above-ground forage structure was divided into A,B and C three layers,it is concluded that the biomass of B layer was higher than those of A and C layer respectively,the biomass of B and C layers increased with alfalfa growth and development,but A layer biomass was stable.CP content diminished and NDF increased with alfalfa growth and development.CP content diminished from 27.55% of vegetative stage to 14.98% of seed pod stage,and NDF contents increased from 30.13% of vegetatie stage to 53.18% of seed pod stage.CP and NDF contents of stems、leaves、blooms and seed pod were different and CP and NDF contents forate of three layers were different.

Key words: Alfalfa, Biomass, Nutrient material, CP, NDF

摘要： 用分层法将苜蓿草层分成A、B、C三层。结果表明,生物量主要集中在B层,A层和C层较少。随着生长发育的进程,B层和C层生物量不断增加,A层生物量相对稳定。从营养期到结实期,B层生物量占总生物量的比例从48.15%增至64.48%,C层由9.88%增至21.06% ,A层则由40.74%降至14.16%。粗蛋白质(CP)含量随着生长的进程不断下降,而中性洗涤纤维(NDF) 含量则不断增加。CP含量从营养期的27.55%降至结实期的14.98%,NDF含量则由30.13%增至53.18%。枝条、叶、花、荚果CP和NDF含量各异,不同层枝条的CP、NDF含量差异较大。

关键词: 苜蓿, 生物量, 营养物质, 粗蛋白质, 中性洗涤纤维

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