消极围栏保护可缓解人为因素对四合木种群的影响，但无法有效促进四合木种群的更新；
Mongolica under the situation of natural renewal, negative conservation by corral, and positive conservation by corral are studied.
消极围栏保护可缓解人为因素对四合木种群的影响，但无法有效促进四合木种群的更新；
Mongolica under the situation of natural renewal, negative conservation by corral, and positive conservation by corral are studied.
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