Title: Effects of Grazing on Population Characteristics of Deyeuxia angustifolia and Content of Main Soil Nutrients
Abstract:The experiment was conducted in Deyeuxia angustifolia meadow with local cattle for 3years,setting three grazing intensity:heavy grazing,moderate grazing and light grazing,taking enclosed area as contr...The experiment was conducted in Deyeuxia angustifolia meadow with local cattle for 3years,setting three grazing intensity:heavy grazing,moderate grazing and light grazing,taking enclosed area as control.In the end of the grazing period,the effects of different grazing intensities on the population characteristics and the main soil nutrient were observed.The height,density,coverage,weight of Deyeuxia angustifolia and other indexes in 0~10cm,10~20cm,20~30cm layer of the soil were analyzed.The results showed that:each grazing intensity can make the height of Deyeuxia angustifoliasignificantly reduced(P0.05),among them,heavy grazing make the height reduced the most obviously,while moderate grazing make it reduced smaller;the coverage of Deyeuxia angustifolia showed the tendency of decline under all grazing intensity,however,in moderate grazing areas,the coverage dropped significantly(P0.05);The density of Deyeuxia angustifolia under the moderate grazing intensity was significantly lower than CK(P0.05),but with the extension of grazing time,it showed a trend of increase.Each grazing intensity makes the weight of Deyeuxia angustifolia reduced,while under heavy grazing it reduced significantly(P0.05).Compared with CK,soil total nitrogen and organic matter content under heavy grazing in 0~10cm soil layer reduced by 8.87%and 9.83%in an average of three years,while reduced by13.92% and 13.32%in 10~20cm soil layer.The effects of grazing on the total nitrogen and organic contents of 20~30cm was not significant.Read More
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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