| 施肥和刈割对混播草地生物量的影响 |
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| 引用本文： | 李昂,吕正文,顾梦鹤,张世挺,周显辉,杜国祯.施肥和刈割对混播草地生物量的影响[J].草业科学,2008,25(7). |
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| 作者姓名： | 李昂 吕正文 顾梦鹤 张世挺 周显辉 杜国祯 |
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| 作者单位： | 兰州城市学院,甘肃,兰州,730070;兰州大学干旱农业生态实验室,甘肃,兰州,730000;兰州大学干旱农业生态实验室,甘肃,兰州,730000 |
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| 摘 要： | 通过测定垂穗披碱草Elymus nutans和羊茅Festuca ovina混播草地生物量,研究施肥和刈割对草地生物量的影响.试验结果表明:1)随混播密度的增加,牧草生物量虽有所上升,但差异不显著;2)施肥显著提高了草地的生物量,而刈割降低了混播草地的产量,施肥和刈割间存在交互效应;3)随着播种密度的增加,尽管垂穗披碱草在牧草中仍占绝大部分,但羊茅所占比例呈增加趋势,有利于群落的稳定;4)从获得最大牧草产量和保持群落稳定角度考虑,混播垂穗披碱草和羊茅草地应选择3 200粒/m2的密度,采取施肥的农艺措施,这样牧草产量可达3.8 t/hm2,杂草可控制在20%以内.
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| 关 键 词： | 青藏高原 草地退化 人工草地 混播 生物量 |
Effect of fertilizing and cutting on biomass of mixed pasture |
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| LI Ang,LV Zheng-wen,GU Meng-he,ZHANG Shi-ting,ZHOU Xian-hui,DU Guo-zhen.Effect of fertilizing and cutting on biomass of mixed pasture[J].Pratacultural Science,2008,25(7). |
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| Authors: | LI Ang LV Zheng-wen GU Meng-he ZHANG Shi-ting ZHOU Xian-hui DU Guo-zhen |
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| Abstract: | A experiment was conducted to determined effect of fertilizing and cutting on biomass of Elymus nutans Festuca ovina mixed pasture in this study.The results of this study showed that forage biomass increased with the increase in mixed density but did not show the significant difference.Fertilization enhanced the forage biomass,however cutting decreased the forage biomass,and interaction effect of fertilization and cutting was found.The relative proportion of E.nutans always dominated in the yield composition of mixed pasture,but biomass of F.ovina gradually increased with the increase of mixed density,which was beneficial to community stability.To harvest the higher biomass and sustain the stability of community,the density of mixed pasture was 3 200 grain/m2 and biomass using this density would reach 3.8 t/hm2 if fertilization had been applied to field management.The relative proportion of weed might be controlled under the 20%. |
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| Keywords: | Tibetan Plateau grassland degeneration pasture mix sown biomass |
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