1. Nowadays, the phenomemon of livestock grazing producers seeking at the short-term profit leads to over-grazing, which is generally understand as the reason of grassland degeneration. �����ҵ��������������棬�ڲ�ԭ�Ϲ��ȷ�����ʹ�ݳ����ص�����̬�˻����Ѿ���Ϊ�����ɹŲ�ԭ�˻��ձ���ͬ��ԭ��
2. after the Taylor grazing act (1934) a grazing permission system led to public rangeland management; �ڶ��ǡ�̩�շ��������䲼��ʼ�˹����ݵع��������������շ����ͷ����շ��ƶȣ�
3. Lower fluctuation in animal body weight was obtained in rotational grazing than that in continuous grazing. Animal production was stable. ���������ɷ�����ȣ����������漾�ڲ���С���������������ȶ���
4. The effects of deferred spring grazing and continuous grazing on the vegetation characteristics of the natural pasture were studied during the ungrading persod of spring of 2002. 2002�괺�����н��������ɷ����ĶԱ��о���������������������Բ�ԭֲ����Ⱥ���������ʮ��������Ӱ�죻
5. The comparative studies on the influence of rotational grazing and continuous grazing on the physical and chemical characters of soil was conducted in desert steppe of Stipa breviflora. �ڶ̻���é��Į��ԭ�Ա��о��˻������������ɷ������ַ����ƶȶԲݵ�����������״��Ӱ�졣
