Grassland Research | 不同生态型水牛草和几内亚草的形态和生产力对半干旱环境中模拟放牧的响应
草地研究GR --- Grassland Research草业科学领域国际学术期刊
导读
畜牧业生产是草食性草原生产系统重要的经济活动,这个过程会改变植物结构和调节生物量动态。肯尼亚内罗毕大学的Bosco Kidake Kisambo等通过放牧模拟实验确定刈割频率和强度对肯尼亚半干旱环境中水牛草和几内亚草的形态和生产力的影响。放牧模拟的频率刈割间隔为2、4和12周,强度为5、10和15 cm刈割高度。同时测定这两种草的形态变化和生物量。结果表明,两种草对模拟放牧频率和强度的响应显著不同,模拟放牧频率和强度显著影响形态参数、分蘖和生物量(p<0.05)。低频刈割(LF)处理干物质产量(DM)最高,其次是中频(MF)和高频(HF)刈割处理。水牛草Kilifi生态型在LF处理下DM比MF和HF处理分别高20%和31%。水牛草Magadi生态型的DM在4周和12周刈割间隔处理下无显著差异,2周的间隔处理下累积DM减少。几内亚草Taveta生态型的DM在MF和HF处理下分别减少23%和25%,Taveta生态型的DM在MF和HF处理下分别减少13%和15%。刈割强度显著影响水牛草的而非几内亚草的DM。
这项研究的结果表明,相对低频率的放牧(4周或12周间隔),10 cm或15 cm刈割高度能获得较高的生物量产量。通常,LF和MF放牧或刈割管理对半干旱地区草地有利。频繁和高强度的放牧管理应被禁止,这样的管理方式很可能会导致生物量产量降低,对牧草和环境产生负面影响。本研究揭示了半干旱环境中乡土草对模拟放牧频率和强度的响应,为进一步开展相关研究工作奠定了基础。
图表
Figure 1:Experimental layout and treatments
Table 1. Morphological traits of Cenchrus ciliaris and Panicum maximum ecotypes under different clipping frequencies at the peak flowering stage
Note: The values shown are means (n = 6). Different letters after the mean within the same column denote significant differences at p < 0.05.
Abbreviations: CC‐KLF, Cenchrus ciliaris—Kilififi; CC-MGD, Cenchrus ciliaris—Magadi; LSD, least significance difference; PM‐ISY, Panicum maximum‐Isinya ISY; PM-TVT, Panicum maximum—Taveta.
Table 2. Morphological traits of Cenchrus ciliaris and Panicum maximum ecotypes under different clipping intensities at the peak flowering stage
Note: Values shown are means (n = 6). Different letters after the mean within the same column denote signifificant differences at p < 0.05.
Abbreviations: CC‐KLF, Cenchrus ciliaris—Kilififi; CC‐MGD, Cenchrus ciliaris—Magadi; LSD, least signifificance difference; PM‐ISY, Panicum maximum—Isinya ISY; PM-TVT, Panicum maximum—Taveta.
Figure 2:Tillering dynamics of the four grass ecotypes under low‐clipping frequency (a), moderate‐clipping frequency (b) and high‐clipping frequency (c) over two seasons. Colored lines represent means (n = 6) for the different ecotypes, while whiskers indicate standard errors. CC‐KLF, Cenchrus ciliaris—Kilififi; CC‐MGD, Cenchrus ciliaris—Magadi; HF, high‐frequency clipping; LF, low-frequency clipping; MF, moderate‐frequency clipping; PM-ISY, Panicum maximum—Isinya ISY; PM‐TVT, Panicum maximum—Taveta.
Figure 3:Cumulative biomass production of Cenchrus ciliaris (a) and Panicum maximum (b) ecotypes under various clipping frequencies over the season. Each bar indicates a mean (n = 3) with standard error indicated on top. Different small letters denote signifificant differences according to Tukey's test at p < 0.05. CC-KLF, Cenchrus ciliaris—Kilififi; CC‐MGD, Cenchrus ciliaris—Magadi; HF, high‐frequency clipping; LF, low-frequency clipping; MF, moderate‐frequency clipping; PM-ISY, Panicum maximum Isinya ISY; PM‐TVT, Panicum maximum—Taveta.
Figure 4:Cumulative biomass production of Cenchrus ciliaris (a) and Panicum maximum (b) ecotypes under various clipping intensities over the season. Each bar indicates a mean (n = 3), with the standard error indicated on top. Different small letters denote signifificant differences according to the Tukey test at p < 0.05. CC-KLF, Cenchrus ciliaris—Kilififi; CC‐MGD, Cenchrus ciliaris-Magadi; HF, high‐frequency clipping; LF, low-frequency clipping; MF, moderate‐frequency clipping; PM-ISY, Panicum maximum—Isinya ISY; PM-TVT, Panicum maximum—Taveta.
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原文链接:https://onlinelibrary.wiley.com/doi/10.1002/glr2.12033
内容来源:Grassland Research(草地研究)Early View(投稿:2022-10-02;接收:2022-11-20;刊发:2023-01-02)
DOI:https://doi.org/10.1002/glr2.12033
引用格式:Kisambo, B. K., Wasonga,O. V., Koech, O. K., & Karuku, G. N. (2022).Morphological and productivity responses ofBuffel grass (Cenchrus ciliaris) and Guinea grass(Panicum maximum) ecotypes to simulated grazingin a semi‐arid environment. Grassland Research, 1(4), 290–300.
文章信息编译者:李渊 兰州大学草地农业科技学院 副教授
说明:该文仅代表编译者对论文的理解,如需参考和引用相关内容,请查阅原文。
期刊介绍
Grassland Research是我国草业科学领域第一本国际学术期刊,季刊,由中国草学会和兰州大学共同主办。该刊受中国科技期刊卓越计划高起点新刊项目支持,由国际出版集团John Wiley & Sons Australia, Ltd.提供出版及宣传服务,于2022年正式出版。
Grassland Research论文刊发范围广,综合性强。从分子到全球变化层面,全维度聚焦草业科学及其在人类可持续发展中的作用。期刊将刊登天然草原,栽培草地、草坪和生物能源作物,以及草地生态系统三大板块的基础性和应用性研究成果、综述、论点等类型的文章。优先考虑发表青年学者优秀研究成果,期待成为青年科学家喜爱的国际学术交流主阵地。
在创刊前三年,Grassland Research将免收版面费,以OA形式通过全球化出版平台Wiley Online Library出版。
排版|王惠知
责任编辑 | 范思佳
审核|彭京伦 武艳培 王新宇
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