草原

草原圣ĕp [关键］欧亚大陆的温带草原，由一般无树的平坦平原组成。它延伸到多瑙河下游地区，在欧洲南部和东南部以及俄罗斯中亚的广阔地带，向东延伸到阿尔泰，向南延伸到外贝加尔湖和满洲平原。这个词有时也适用于匈牙利相应的温带草原(平原),大草原美国的潘帕斯草原和高原(见草原(南非);它有时也适用于炎热沙漠边缘的半干旱地区。草原由三个气候差异显著的植被带组成:树木繁茂的草原;草原:可耕作的草原或大草原;还有不可开垦的草原。树木繁茂的草原上有落叶树和最重的年降雨量，超过16英寸。(41厘米)。可耕作的草原有黑土，年降雨量在10到15英寸之间。(25-38厘米)。不可开垦的草原是半沙漠，特别是在里海周围，年降雨量不到10英寸。 (25 cm). There is some grazing, and its soils are relatively fertile under irrigation. Although the tillable steppe was originally grassland used almost exclusively for grazing, it is now almost entirely under cultivation. Some of the world's most productive agricultural areas, such as Ukraine and the U.S. wheat belt, are situated on the tillable steppe.

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