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我国粮食作物种植面积约17亿亩,其中水稻为5亿亩,占粮食作物面积近1/3,而产量却占粮食总产量的43-45％,据1982年统计,平均亩产325公斤,居世界第10位,虽高于世界平均单产189.6公斤的水平,却比朝鲜、日本、马来西亚、美国和澳大利亚等国都低。我省水稻面积250万亩,平均亩产400公斤。农垦系统38万亩,单产为475公斤。我县(原柏各庄农场)27万亩,单产达535公斤,近几年并连续出现单产700公斤以上的地块。而我国云南省宾川县6.87亩桂潮二号(籼稻)和3.99亩滇榆一号(粳稻)单产分别达到1010.09公斤和1005.15公斤。另据美国研究,水稻的生物产量为2400公斤,理论产量为1200公斤。可见水稻的增产潜力还是很大的。回顾与总结过去冀东滨海一季稻高产的实践经验,探讨水稻再高产的新途径,在主体配套技术方面,应重点抓好以下几项:
China’s grain crop planting area of about 1700000000 acres, of which 500000000 acres of rice, accounting for nearly 1/3 of the area of food crops, but the output accounted for 43-45% of total grain output, according to 1982 statistics, the average yield of 325 kilograms, Ranking tenth in the world, although higher than the world average yield of 189.6 kilograms, but lower than North Korea, Japan, Malaysia, the United States and Australia and other countries. The rice area in our province is 2.5 million mu, with an average yield of 400 kg per mu. Farm system 380000 acres, yield 475 kilograms. My county (formerly Pak Kwan Zhuang farms) 27 mu, yield of 535 kg, in recent years and continuous yield of 700 kg or more plots. In China, 6.87 mu Gui Chao II (indica rice) and 3.99 mu Dian Yu 1 (japonica rice) in Binchuan County, Yunnan Province, China, have a yield of 1010.09 kg and 1005.15 kg respectively. According to the study of the United States, the biological yield of rice is 2,400 kg, and the theoretical yield is 1,200 kg. Visible growth potential of rice is still great. Review and summarize the past experience of Jidong coast of a quarter of high yield of rice to explore new ways for rice to re-high yield, the main supporting technology, should focus on the following: