| 科尔沁沙地敖汉苜蓿地上生物量及营养物质累积 |
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| 引用本文： | 孙启忠,韩建国,桂荣,刘国荣.科尔沁沙地敖汉苜蓿地上生物量及营养物质累积[J].草地学报,2001,9(3):165-170. |
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| 作者姓名： | 孙启忠 韩建国 桂荣 刘国荣 |
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| 作者单位： | 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 |
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| 基金项目： | 国家“九五”科技攻关96-016-01-04专题研究内容 |
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| 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。
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| 关 键 词： | 苜蓿 生物量 营养物质 粗蛋白质 中性洗涤纤维 |
| 收稿时间： | 2001-01-11 |
Accumulation of Biomass and Nutrient Material of Aohan Alfalfa in Kerqin Sand |
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| SUN Qi-zhong,HAN Jiang-guo,GUI Rong,LIU Guo-rong.Accumulation of Biomass and Nutrient Material of Aohan Alfalfa in Kerqin Sand[J].Acta Agrestia Sinica,2001,9(3):165-170. |
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| Authors: | SUN Qi-zhong HAN Jiang-guo GUI Rong LIU Guo-rong |
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| Institution: | 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 |
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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. |
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| Keywords: | Alfalfa Biomass Nutrient material CP NDF |
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