三圃制

三圃制与中古英国的运输革命

Three-Course Cropping and Transport Revolution of Medieval England

从12世纪开始，三圃制在英国的推广普及使得燕麦有了稳定的产量，加上套马技术的进步，从而为马在经济尤其是交通运输中发挥作用解决了饲料问题和技术问题。

From 12 ~ ( th ) century the popularity of three-course cropping guaranteed the steady output of oat and resolved the fodder of horse which played important role in transport .

它的主要特点是建立保种圃，逐步消除育种剩余变异，将三圃制中的株行圃和株系圃融为一体。

Its characteristics are to establish the seed maintained plot , eliminate the remaining variation of breeding progressively , and combine the plant - row polt and the lant-line plot of ' three-plot system ' .

我国长期沿用的农作物良种繁育方法三圃制，存在许多弊端，已不适应农业发展形势的需要。

There are many disadvantages in Three seedling Nursery System , the breeding method of the improved varieties of crops , having been applied in our country . which can not adapt to the necessity of the development of agriculture .

其次，他们设计的窄条三圃田农耕制延用至18世纪。

Secondly , they devised the narrow-strip , three-field farming system which continued to the 18th century .