放牧利用草地植被健康评价体系的研究  

Study on Grasslands Vegetation Health Evaluation System for Grazing

作　　者：陈昕 CHEN Xin(Gannan Grassland Workstation in Gansu Province ,Gansu Hezuo 74700)

机构地区：[1]甘肃省甘南州草原工作站,甘肃合作747000

出　　处：《畜牧兽医杂志》2018年第3期24-28,共5页Journal of Animal Science and Veterinary Medicine

基　　金：国家公益性行业(农业)科研专项(201203006)

摘　　要：本研究以甘肃省夏河县桑科草原高寒草甸为研究对象,建立一个基于放牧利用的草地健康评价植被体系。该指标体系由草地群落中各植物的盖度、生物量以及适口性组成,可以反映出草地生态系统的生态及生产两方面的性质。利用该草地健康指标体系在三种不同类型的草地中对不同植被盖度的草场的健康指数进行研究,发现在不同盖度的草场的健康指数均差异显著(P值均小于0.001)。这表明我们建立的指标体系的灵敏度较高,能够真实地反映草地健康状况。该草地健康指数只能反映同一地区,同一类型草地的健康程度,不可在不同地区,不同草地类型草地间进行比较。该草地健康评价指标体系适用于基层草地管理人员和牧民对某一地区或自有草场的健康状况进行长期监测。Through studies on alpine meadows in Xiahe county of Gansu,a model of health ecosystem for grasslands used for grazing was built.In this model,a comprehencive health index was cultulated with plant coverage,biomass and plant palatability.This health index can give us some ecological and yielding information of the grassland.The grassland health index was studied along coverage gradients of three different kinds of grasslands.The results showed that there is a significant difference between grasslands with different coverage（P〈0.001）.It indictated that this health index is of high sensitiveness,and can reflect the state of grassland＇s health accuratelly.Because no information about physical environment was involved in our model of ecosystem health index,there was no comparability between health indexs in different regions or grasslands of different kinds of grasslands.This model can be used by primary grassland managers and farmers for grassland monitoring.In conclusion,it is a comprehensive,simple,accurate and applicable index.

关 键 词：生态系统健康 草地 放牧利用 盖度 适口性 生物量 

分 类 号：S812.29[农业科学—草业科学]