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水稻种植总面积以1981年为最高,超过了2250万亩。种植面积对市场和价格的动向,特别是对国外需求动向的反应很敏感。1974年稻作农场数约9600个,每个农场平均水稻种植面积德克萨斯、加利福尼亚及密西西比州为2250亩左右,阿肯色及路易斯安娜州为1350亩左右。美国水稻单产于50年代后半期急剧上升,到1981年平均亩产稻谷达720斤。同年,日本单产为756斤。特别是加利福尼亚州,最近竟高达1027斤。其背景是新品种、高效农药,新栽培技术的开发与普及等。加利福尼亚州水稻高产的原因,除不断推广中、短粒品种中的矮秆、壮秆、
The total area planted to rice in 1981 was the highest, exceeding 22.5 million mu. The acreage is sensitive to market and price movements, especially to the movements in demand abroad. In 1974, the number of paddy farms was about 9,600. The average area under rice cultivation in each farm was about 2,250 acres in Texas, California and Mississippi, and 1,350 acres in Arkansas and Louisiana. US rice yields rose sharply in the second half of the 1950s, reaching an average of 720 kg per mu in 1981. In the same year, Japan’s yield was 756 pounds. Especially in California, the recent as high as 1027 pounds. The background is the new varieties, efficient pesticides, new cultivation techniques development and popularization. California, the reason for the high yield of rice, in addition to continue to promote medium and short varieties of dwarf, strong stalks,