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六十年代,日本粮食播种面积虽有减少,而单产则有上升趋势。1960—1970十年粮食播种面积减少1502万亩,粮食由亩产608斤增至657.7斤,约增产8.2%,每年平均约增加5斤。水稻是日本主要粮食作物,1970年播种4385万亩,收获稻谷316亿斤,分别占粮食总面积和总产量的85%和93%。由于采用综合技术措施的结果,五十年代末水稻总产达到313亿斤,单产为634斤。至六十年代前期,水稻徘徊在300—320亿斤左右。1967年由于气候良好,技术措施又有改进,水稻总产上升为360亿斤,亩产734斤。1970年水田比1900年减少577万万亩,总产减少4.20亿斤,而单产则由1960年的645.1斤增至719.9斤,增产11.6%,平均每年增加7.5斤。增加水稻单产的主要技术措施是:
In the 1960s, although the sown area of grain in Japan decreased, the yield per unit area went up. In the 1960-1970 decade, the sown area of grain was reduced by 15.02 million mu. The grain output increased from 608 kg per mu to 657.7 kg, an increase of 8.2% and an average increase of 5 kg per annum. Rice is Japan’s major food crop. In 1970, it sowed 43.85 million mu and harvested 31.6 billion tons of rice, accounting for 85% and 93% of the total grain output and total output, respectively. As a result of adopting comprehensive technical measures, the total output of paddy rice in the late 1950s reached 31.3 billion catties, with a yield of 634 catties. By the early 1960s, rice hovered around 300-320 billion jin. In 1967, due to the favorable climate and the improvement of technical measures, the total output of rice rose to 36 billion kilos, yielding 734 kilograms per mu. In 1970, paddy fields decreased by 577 million mu compared with 1900, with total output reduced by 420 million jin. Yield per head increased from 645.1 jins in 1960 to 719.9 jins, an increase of 11.6%, an average increase of 7.5 kilograms per year. The main technical measures to increase rice yield are: