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本文引用了甜菜单产指数IT、提出糖粮单产比指数ZTL的分析方法,对两个指数进行了理论阐述和实际运用.通过1978—1982年全国各省甜菜糖单产指数、全国13家大型糖厂1973—1982年甜菜糖单产指数分析,认为该方法同平均单产分析法相比可排除全国性的因灾害、政策性变动而造成的产量大起大落等不利比较的因素,简化地域间的比较,宜于本地年际间的比较,数据更直观化。通过对全国各省糖粮单产比指数、黑龙江省8县1982—1984年糖粮单产比指数举例分析可以看出,单产比指数比单产比更便于不同作物间生产力横向比较,确定优势作物.
This article quoted the sweet potato yield index IT, proposed sugar content of grain yield index ZTL analysis method, the two indexes were described in theory and practical application.By the 1978-1982 provinces beet sugar yield index, the country’s 13 large sugar factory 1973 - 1982 sugar beet yield index analysis, that the method compared with the average yield analysis method can rule out a national due to disasters, policy changes caused by the ups and downs and other output factors such as unfavorable comparison, to simplify the comparison between regions, appropriate to the local year Inter-comparison, the data more intuitive. Through the analysis of the ratio of sweet and sour grains per unit of output across the country and the index of sugar-grain yield per unit of output between 1982 and 1984 in 8 counties in Heilongjiang province, it can be seen that the ratio of yield to yield is easier than the yield to facilitate the horizontal comparison of productivity among different crops and the dominant crops are identified.