| 施氮对15龄不同组合禾草混作草地的改良研究 |
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| 引用本文： | 刘皓栋,曹文侠,李文,徐长林,李小龙,师尚礼.施氮对15龄不同组合禾草混作草地的改良研究[J].草地学报,2015,23(5):1109-1113. |
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| 作者姓名： | 刘皓栋 曹文侠 李文 徐长林 李小龙 师尚礼 |
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| 作者单位： | 甘肃农业大学草业学院草业生态系统教育部重点实验室中-美草地畜牧业可持续发展研究中心, 甘肃 兰州 730070 |
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| 基金项目： | 现代农业产业技术体系，国家自然科学基金，甘肃省退牧还草科技支撑项目 |
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| 摘 要： | 以15龄混作禾草草地为对象,研究不同施氮肥量0(CK),75(N1),150(N2)和225 kg·hm-2(N3)对植物群落特征的综合影响。结果表明:施肥提高牧草高度和地上生物量,降低了植物群落的物种丰富度,但对混作草地主要牧草的优势地位影响不明显。N2极显著增加了混作草地的产量和Jaccard多样性指数(P<0.01),降低了Whittaker多样性指数,在提升草地生产力的同时,保持了群落的相对稳定性。
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| 关 键 词： | 施肥 多年生禾草 混播 多样性指数 |
| 收稿时间： | 2014-08-29 |
The Comprehensive Influence of Fertilization to Mixture Cultivated Perennial Grassland |
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| LIU Hao-dong,CAO Wen-xia,LI Wen,XU Chang-lin,LI Xiao-long,SHI Shang-li.The Comprehensive Influence of Fertilization to Mixture Cultivated Perennial Grassland[J].Acta Agrestia Sinica,2015,23(5):1109-1113. |
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| Authors: | LIU Hao-dong CAO Wen-xia LI Wen XU Chang-lin LI Xiao-long SHI Shang-li |
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| Institution: | Grassland Science College of Gansu Agricultural University, Grassland Ecosystem Key Laboratory of Ministry of Education, Sino-U. S. Research Centers for Sustainable Grassland and Livestock Management, Lanzhou, Gansu Province 730030, China |
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| Abstract: | The comprehensive influences of different fertilization treatments(CK, N1, N2 and N3) on the characteristics of plant community were analyzed using the six perennial grasslands mixture cultivated for 15 years as materials. The results showed that the richness index of grassland gradually decreased with the increase of fertilization, and fertilization drastically boosted the plant height and aboveground biomass of grassland. The dominant species of cultivated perennial grassland was not obviously changed by fertilization for the first year. In addition, the fertilization in N2 treatment significantly increased the aboveground biomass and Jaccard diversity index of cultivated perennial grassland(P<0.01), and decreased Whittaker diversity index. Meanwhile, the grassland productivity was improved and the relative stability of community was maintained by fertilization in N2 treatment. |
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| Keywords: | Fertilization Perennial grassland Mixture sowing Diversity index |
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