草地学报

›› 2013, Vol. 21 ›› Issue (4): 702-707.DOI: 10.11733/j.issn.1007-0435.2013.04.012

• 研究论文 • 上一篇    下一篇

供氮水平对不同紫花苜蓿产量及品质的影响

刘晓静1, 刘艳楠1, 蒯佳林2, 齐敏兴1, 张晓磊1   

  1. 1. 草业生态系统教育部重点实验室(甘肃农业大学)甘肃农业大学草业学院 甘肃省草业工程实验室 中-美草地畜牧业可持续发展研究中心, 甘肃 兰州 730070;
    2. 甘肃省农业科学院, 甘肃 兰州 730070
  • 收稿日期:2013-01-18 修回日期:2013-03-22 出版日期:2013-08-15 发布日期:2013-08-14
  • 作者简介:刘晓静(1968- ),女,甘肃酒泉人,博士,教授,主要从事草坪与牧草营养生理研究,E-mail:liuxj@gsau.edu.cn
  • 基金资助:
    草业生态系统教育部重点实验室(甘肃农业大学)开放课题(CYZS-2011012);甘肃省财政厅项目"外源氮素供应对紫花苜蓿产量和品质形成影响研究";甘肃省自然基金项目(1010RJZA157)资助

Effects of Different N Levels on Productivity and Quality of Alfalfa Varieties

LIU Xiao-jing1, LIU Yan-nan1, KUAI Jia-lin2, QI Min-xing1, ZHANG Xiao-lei1   

  1. 1. Key Laboratory of Grassland Ecosystem, Ministry of Education/College of Pratacultural Science, Gansu Agricultural University /Pratacultural Engineering Laboratory of Gansu Province/Sino-U.S. Centers for Grazingland Ecosystem Sustainability, Lanzhou, Gansu Province 730070, China;
    2. Gansu Academy of Agricultural Sciences, Lanzhou, Gansu Province 730070, China
  • Received:2013-01-18 Revised:2013-03-22 Online:2013-08-15 Published:2013-08-14

PDF

摘要： 在甘肃兰州秦王川地区以甘农3号(Medicago sativa ‘Gannong No. 3')和陇东苜蓿(M. sativa 'Longdong')为材料,设置3个供氮水平处理N0(0),N1(51.75 kg·hm-2)和N2(103.50 kg·hm-2),对其产量、株高及营养品质进行测定,以探讨供氮对紫花苜蓿的综合影响。结果表明:供氮对紫花苜蓿综合影响明显,供氮能显著提高其产量,且产量随供氮水平的增加而增加,在N2水平下紫花苜蓿总产量最高,甘农3号的最高鲜草产量为51005 kg·hm-2、干草产量为14856 kg·hm-2,陇东苜蓿鲜草产量为35486 kg·hm-2,干草产量为11217 kg·hm-2,甘农3号明显优于陇东苜蓿;供氮还显著提高2个品种的株高,株高与产量变化趋势一致,甘农3号表现更佳;供氮也改善了紫花苜蓿营养品质,显著降低2个品种酸性洗涤纤维、中性洗涤纤维和粗灰分的含量,提高其粗蛋白和粗脂肪的含量。因此,从产量和营养品质综合考虑,该地区最佳施氮量为103.50 kg·hm-2。

关键词: 紫花苜蓿, 氮, 产量, 品质

Abstract: In order to understand the comprehensive influence of N supply on alfalfa, the effects of three N levels (N0 (0), N1 (51.75 kg·hm-2), N2 (103.50 kg·hm-2)) on the productivity, height and quality of Medicago sativa ‘Gannong No. 3' and M. sativa ‘Longdong' were studied in the Qinwangchuan of Gansu Province by randomized block design. Results showed that comprehensive influence was obvious under N supply, and productivity increased along with N fertilizer increased. The productivity of alfalfas reached the highest under N2 (103.50 kg·hm-2) level and Gannong No. 3 was obviously better than Longdong. The highest fresh biomass and dry biomass of Gannong No.3 were 51005 kg·hm-2 and 14856 kg·hm-2, Longdong were 35486 kg·hm-2 and 11217 kg·hm-2. N supply also significantly increased the height of both alfalfa varieties. The change-trend for height was consistent with that of productivity, and Gannong No. 3 did better than Longdong. In addition, N supply could improve the nutrient quality of alfalfa, significantly reduce ADF, NDF and ash contents and increase crude protein and ether extract contents. The best N application rate was 103.50 kg·hm-2.

Key words: Alfalfa, N, Biomass, Quality

中图分类号: