投资 · 西方古典
托马斯·马尔萨斯:人口论·摘录 161
托马斯·马尔萨斯《人口论》· An Essay on the Principle of Population · 投资
That the produce of the land has been decreasing, or even that it has been absolutely stationary during the last century, few will be disposed to believe. The enclosure of commons and waste lands certainly tends to increase the food of the country, but it has been asserted with confidence that the enclosure of common fields has frequently had a contrary effect, and that large tracts of land which formerly produced great quantities of corn, by being converted into pasture both employ fewer hands and feed fewer mouths than before their enclosure. It is, indeed, an acknowledged truth, that pasture land produces a smaller quantity of human subsistence than corn land of the same natural fertility, and could it be clearly ascertained that from the increased demand for butchers' meat of the best quality, and its increased price in consequence, a greater quantity of good land has annually been employed in grazing, the diminution of human subsistence, which this circumstance would occasion, might have counterbalanced the advantages derived from the enclosure of waste lands, and the general improvements in husbandry.
出处:
https://www.gutenberg.org/ebooks/4239
定位:Excerpt 161 · 核对日期:2026-10-19 · 核验:短摘录
白话
很少有人相信土地产出在过去一个世纪下降或停滞。圈占公地和荒地确实能增加食物,但有人断言,圈占公共耕地常产生相反效果:大片原先产粮的土地改为牧场后,雇佣更少人、养活更少人。同样肥力的牧场比粮田养活的人少,这是公认的。如果因对优质肉类的需求增加、价格上升,更多好地用于放牧,那么食物减少可能抵消圈占荒地和农业改良的好处。核心是:土地用途改变可能减少人类食物总量。
上下文
马尔萨斯讨论圈地运动对粮食生产的影响,指出牧场化可能减少人类食物供给。
今日一问
今天的土地利用变化(如耕地转经济作物)是否也在影响粮食安全?
公版作品;原文逐字取自 Project Gutenberg,仅摘录段落并附全书链接。
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