在堪萨斯州的西南部，曾经的短草牧场因为被圆形的饲料作物田地点缀而变得斑驳起来，整张图片宛如一幅美妙的现代艺术作品。

Resembling a work of modern art, variegated green crop circles cover what was once shortgrass prairie in south-western Kansas.

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结果表明，耐寒性差、生长期短的一年生植物微孔草m DA含量较低，保护酶活力也较低。

The results showed that MDA content was lower in annual grass, also several antioxidant enzyme activities were lower.

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通过对试验数据的回归分析，建立了林灌地和封禁草灌地在短历时暴雨条件下的土壤水分入渗经验模型。

By the regression analysis of date observed from this experiment, a model of infiltration for forest-shrub land and grass-shrub land was constructed.

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