2003年我国柑桔栽培面积已达150.6万hm2,居世界第一,产量达1345万t,居世界第三。但是过去10年,每667m2产量只有525kg,仅为世界平均水平1200kg的44%,同世界柑桔主产国巴西和美国相比,差距更大。巴西每667m2产量为1700kg,是我国的3倍多,美国每667m2产量为2400kg,是我国的4.6倍。 In 2003, China’s citrus cultivated area has reached 1.56 million hm2, ranking the first in the world with the output reaching 13.45 million tons, ranking the third in the world. However, in the past 10 years, the output per 667m2 was only 525kg, only 44% of the world average of 1200kg. This gap is even greater than that of Brazil and the United States, the major citrus producing countries in the world. The output of Brazil per 667m2 is 1700kg, more than three times of that of China. The output of every 667m2 in the United States is 2400kg, which is 4.6 times that of our country.