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平罗县地处宁夏北端,是一农业人口大县。我们于1992年10月中旬对120户农民进行了营养膳食调查。 一、对象和方法 1.对象:采用1992年全国营养调查抽样方法,确定具有代表性的农业区的4个村,120户,501人为调
Pingluo County is located in the northern end of Ningxia, is a large agricultural population. We conducted a nutritious dietary survey of 120 peasants in mid-October 1992. I. Objects and Methods 1. Subjects: The sampling method of the National Nutrition Survey of 1992 was used to determine the representative villages in four villages, 120 households and 501 people.