Research On Estimation Of Milu Nutrient Capacity In Shishou Milu National Nature Reserve

Milu is a rare and protected animal unique to China,and the stone-headed elk is also the second largest wild population of elk in the world.The Shishou Milu Reserve was established with the main goal of protecting the milu population and its habitat.The protection and maintenance of the elk habitat and the rejuvenation of the population,natural domestication and reintroduction into the wild are the focus of work.The main findings of this paper are summarized as follows.(1)In spring and summer,plants in the reserve grow vigorously,and there are more edible plants for elk;In autumn and winter,there are fewer plants in the reserve,and there are fewer edible plants for elk.There were 8 main foodborne plants of spring milu,which were roughly divided into cattle tendon grass community,alfalfa community,sour leaf community and snakeberry community,among which the biomass dominant species were acid mold leaf butterfly,lychee grass,mud pepper and dog tooth root.There are 18 species of main foodborne plants in summer milu,which can be roughly divided into four major communities,namely dogtooth root community,Li’s grass community,alfalfa community and verbena community.Among them,the biomass dominant species were alfalfa,dogtooth root,motherwort,Li’s grass and perilla grass.There were 8 main foodborne plants in autumn and winter,among which the biomass dominant species were axle grass,sour leaf leaf and dog tooth root.(2)According to the Hobbs model,it can be calculated that the nutrient capacity of elk per hectare in spring is about 2,the nutrient capacity of elk per hectare in summer is 3,and the nutrient capacity of elk per hectare in autumn is 1.Since the nutrient capacity per hectare is 2 in spring,3 in summer,and 1 in autumn and winter,it can be concluded that the nutrient capacity is 1838 head in spring,3654 head in summer and 514 head in autumn and winter.(3)Under ideal conditions,the milu population in the Shishou Milu Reserve is always maintained below the capacity.Population dynamics in the Tototou Elk Sanctuary are also very different when the environmental capacity is different.When the environmental capacity was only 514 head,the population declined rapidly.When the environmental capacity was 3654 individuals,the population expanded.This shows that the increase in environmental capacity is conducive to population survival and population expansion.(4)Population viability analysis is an important method for studying species development dynamics and is a hot spot in conservation biology research.In the process of this study,due to the lack of long-term observation and recording of some data,some indicators can only represent the occurrence of populations in a certain period of time,which will affect the results to a certain extent.Therefore,in the process of elk breeding,it is necessary to record the changes of elk population in detail,and do a good job in statistics such as milu group size,sex ratio,age structure,family lineage,genealogy,and fertility,so as to provide reference for the study of elk population.