草地学报

草地学报 ›› 2016, Vol. 24 ›› Issue (2): 416-424.DOI: 10.11733/j.issn.1007-0435.2016.02.026

• 技术研发 • 上一篇    下一篇

刈割对牧草根系生长特征的影响

张雪1, 董建国1,2, 汪有科1,2, 白永红1, 聂真义3   

  1. 1. 西北农林科技大学水利与建筑工程学院, 陕西 杨凌 712100;
    2. 中国科学院水土保持研究所, 陕西 杨凌 712100;
    3. 西北农林科技大学资源环境学院, 陕西 杨凌 712100
  • 收稿日期:2014-12-22 修回日期:2015-06-19 出版日期:2016-04-15 发布日期:2016-06-06
  • 通讯作者: 汪有科
  • 作者简介:张雪(1989-),女,宁夏中卫人,硕士研究生,主要从事节水灌溉新技术研究,E-mail:zxheyeh@126.com
  • 基金资助:

    国家林业公益项目(201404709);陕西省科技统筹创新工程计划项目(2013KTZB02-03-02);国家科技支撑计划项目(2015BAC01B03)资助

Effect of Cutting Height on the Root Growth Characteristics of Forages

ZHANG Xue1, DONG Jian-guo1,2, WANG You-ke1,2, BAI Yong-hong1, NIE Zhen-yi3   

  1. 1. College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi Province 712100, China;
    2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi Province 712100, China;
    3. College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi Province 712100, China
  • Received:2014-12-22 Revised:2015-06-19 Online:2016-04-15 Published:2016-06-06

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摘要：

为探索半干旱区刈割对牧草根系特征的影响,本研究选用早熟禾(Poa pratensis L.)、白三叶(Trifolium repens L.)、毛苕子(Vicia villosa)为试验材料,采用室内和野外相结合的方法,研究了牧草根系特征对刈割的响应。结果表明:刈割可降低牧草根深、根长及根表面积。在刈割留茬3 cm高度时,早熟禾根深、根长及根表面积较对照分别降低43.91%,51.85%,25.52%;白三叶根深、根长及根表面积较对照分别降低27.27%,47.04%,27.35%;毛苕子根深、根长及根表面积较对照分别降低20.34%,39.80%,40.39%。野外早熟禾刈割留茬9 cm时根长密度最小,白三叶在刈割留茬3 cm时根长密度最小,毛苕子刈割留茬6 cm时根长密度最小。该研究对半干旱区牧草刈割留茬高度选择具有参考价值。

关键词: 牧草, 刈割, 根系特性, 黄土丘陵区

Abstract:

To explore the effect of harvest on the forages root traits in Semi-Arid Region, indoor and field experiment were conducted to test root characteristics of Poa pratensis, Trifolium repens and Vicia villosa. The results showed that cutting can reduce the root depth, root length and root surface area. The root depth, root length and root surface area of P. pratensis at 3 cm stubble height were decreased by 43.91%, 51.85% and 25.52% compared to the control, respectively. At 3 cm stubble height, the root depth, root length and root surface area of T. repens decreased by 27.27%, 47.04% and 27.35% compared with the control, respectively. The root depth, root length and root surface area of V. villosa at 3 cm stubble height were decreased by 20.34%, 39.80% and 40.39% compared with the control, respectively. P. pratensis in field conditions showed the minimum root length density at 9 cm stubble height and T. repens showed the minimum root length density at 3 cm stubble height in field conditions, while V. villosa showed the minimum root length density at 6 cm height in field conditions. The research provided very important reference values for the choice of stubble height of cutting forages in semi-arid region.

Key words: Forages, Clipping, Root characteristics, Loess hilly region

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