Acta Agrestia Sinica ›› 2014, Vol. 22 ›› Issue (3): 433-438.DOI: 10.11733/j.issn.1007-0435.2014.03.001

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Notes on the Concept of Preference in Grazing Ecology and Grassland Management

WANG De-li, WANG Ling   

  1. Institute of Grassland Science, Northeast Normal University, Key Laboratory of Vegetation Ecology, Ministry of Education, Changchun, Jilin Province 130024, China
  • Received:2013-09-03 Revised:2013-11-18 Online:2014-06-15 Published:2014-06-04

放牧生态学与草地管理的相关概念:Ⅰ.偏食性

王德利, 王岭   

  1. 东北师范大学草地科学研究所 植被生态科学教育部重点实验室, 吉林 长春 130024
  • 作者简介:王德利(1963- ),男,辽宁锦州人,教授,研究方向为草地生态学,E-mail:wangd@nenu.edu.cn
  • 基金资助:

    农业部行业公益项目(201003019);国家自然科学基金(31230012)(31370453)资助

Abstract:

For this paper, preference as one of the basic concepts is described from its contexts and dimensions. Firstly, preference in generally is defined by foraging intensity without grazing pressure, and animal preference, having species-specific, i.e. endogenous genetic structure and developmental or physiological characters, also may refer to potential diet selectivity or foraging strategy. Second, based on foraging time-scale and habitat, two couples of preference dimension are put forward as continuous preference vs. instaneous preference, and absolute preference vs. relative preference. Continuous preference is characterized as a stable long-term foraging intensity under evolutionary experiences, but instaneous preference for a short-term foraging intensity for animals. Absolute preference is here defined by voluntary intake within the foraging habitat with one kind of food, and relative preference refers to those foraging habitats within two or multiple foods. We suggested that it is essential to further explore the contexts, significances, and measurement of animal preference, and their implications to foraging theory, co-adaptation and co-evolution between plant and herbivore, as well as grassland or grazing management practices.

Key words: Preference, Palatability, Foraging, Grazing ecology, Grassland management

摘要:

本文对放牧生态学中的一个基本概念-偏食性的涵义(属性)与维度等进行了相对全面地释义;并对比分析了与之密切相关的适口性概念。偏食性是指动物基于自身特性以及动物体状态(包括遗传特征、发育阶段、生理与营养状态等),在不受食物供给量限制的条件下,对所在生境中食物(或植物种类)表现出的采食程度差异,它具有动物依赖性、动态性及相对性。偏食性的测度能够一定程度地反映动物的食性选择趋向,或者体现动物对生境中不同食物的潜在采食或消耗量;对偏食性的分析还有助于解释动物的食性选择策略,有益于揭示动物的采食行为规律。偏食性的维度包括持续偏食性与即时偏食性,以及绝对偏食性与相对偏食性。持续偏食性是动物经过长期进化形成的、对某种食物表现出较长时间的稳定的采食强度,即时偏食性是动物在某一时间对食物的采食强度,即动物偏食性的瞬时度量;绝对偏食性是动物在面对某种单一食物、于自由采食状态下所度量的对该食物的采食强度,绝对偏食性可以被认为是动物最基本的偏食性维度,而相对偏食性是指同时提供2种或多种食物背景下,所度量的动物对某种食物的自由选择采食强度。深刻认识、理解动物的偏食性概念及涵义,并将之有效地应用于实际的草地放牧管理之中,对于发展动物采食理论,动、植物协同适应及进化理论,有效实施草地家畜管理都具有突出的科学价值和实践意义。

关键词: 偏食性, 适口性, 采食, 放牧生态学, 草地管理

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