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1.因素分析近年来,随着柑桔生产的不断发展,柑桔产量有较大的增长,1989年跃居全国水果之首。但单产低,投产率不高,大小年结果现象在各产区仍较为普遍。极大地影响着柑桔生产持续稳定地发展和经济效益的提高。据统计,1989年全国柑桔栽培面积已达1538.9万亩,平均亩产为296.38公斤(与世界主产国比相差较远,美国1500～2000公斤/亩,日本1500～
1. Factor Analysis In recent years, with the continuous development of citrus production, citrus production has a greater growth, ranking first in the country in 1989 fruit. However, the yield is low and the rate of production is not high. The annual result of size and size is still relatively common in various producing areas. Greatly affected the continuous and steady development of citrus production and economic benefits. According to statistics, the area of citrus cultivation in 1989 reached 15.389 million mu and the average mu production was 296.38 kilograms (far from the world’s major producing countries, with 1500-2000 kilograms per mu in the United States,