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一、辽东地区水稻生产现状及其限制因素辽东稻区包括抚顺市、本溪市及铁岭市东北部等8县区,有80多万亩稻田。该地区种稻约有百年历史,传统经验丰富,早期单产曾居省内中上水平,是我省著名老稻区。近20年来,基于省水稻生产重点逐步向中部和中南部转移,加之本区地域偏隅,技术封闭,致使整个东部山区水稻生产技术进步较为明显地落后于中部高产稻区。本区不利的自然因素,也增加了水稻生产技术改进的难度,制约着水稻正常生育质量。主要有两方面不利因素:(1)受山区冷凉(积温少,山区年活动积温≤2900℃,丘陵小平原区为2900～3200℃)、寡
I. Present Situation and Limitation Factors of Rice Production in Liaodong Region Liaodong rice fields include 8 counties and districts in Fushun City, Benxi City and northeast Tieling City, with more than 800,000 mu of paddy fields. The region about 100 years of rice history, rich traditional experience, the early yield was middle level in the province, is our province famous old rice area. In the recent 20 years, based on the shift of key provincial rice production to Central and South Central China, combined with the partial closure of the area and technology, the technological progress of rice production in the entire eastern mountain region lags behind the high yielding rice region in the central China. The unfavorable natural factors in this area also increase the difficulty of improving rice production techniques and restrict the normal fertility quality of rice. There are two main unfavorable factors: (1) by the mountain cold (less accumulated temperature, mountain activity accumulated temperature ≤ 2900 ℃, hilly area of 2900 ~ 3200 ℃), oligo