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草地学报  2014 

联户规模对高寒草场质量的影响分析——以甘肃玛曲为例

DOI: 10.11733/j.issn.1007-0435.2014.06.001, PP. 1147-1152

Keywords: 草场,牧民,联户规模,草场质量

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Abstract:

通过测定不同规模联户管理下草场的可食草盖度、牧草高度、草场鼠洞数量、毒杂草比例及地上生物量等衡量草场质量的指标,统计分析后得出相比较单户、小联户与大联户而言,中联户管理的草场具有更高的草场盖度、牧草高度及地上生物量(EVI值),具有更少的鼠洞数量及更低的毒杂草比例,即由中联户管理的草场其质量最高.在此基础上以经济学视角分析草场质量差异的人文因素,表明单户或小联户具有较强的管理因素制约及较弱的自然因素制约,大联户具有较强的自然因素制约及较弱的管理因素制约;这3种联户内成员均会由于制约不足而出现增加饲养量的情况,造成过载放牧,并最终降低草场质量.中联户在较强的管理因素及自然因素的共同制约下,其内部成员均无增加饲养量的动机,因此整个联户将不会或很少出现过载放牧的情况.

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