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营口稻区地处辽河下游,渤海之滨,境内河流纵横交错,地势平坦,水源较丰,土壤盐碱,极宜垦植稻作。现有稻田一百六十八万亩,占总耕地面积的二分之一,占粮食产量的三分之二,是辽宁省的主要稻区之一。近年来,伴随化肥施肥量的增加和施肥法的改善,促进了水稻大幅度增产。当前水稻施肥主要是氮素化肥。氮素施用是否合理,不仅是肥料利用率高低的问题,而且是直接关系到水稻产量多少的关键问题之一。多年来,我们用化学分析法对水
Yingkou rice paddy is located in the lower reaches of the Liaohe, Bohai Sea coast, the river intertwined, flat, water is abundant, soil salinization, very suitable for cultivation of rice. The existing paddy field of 1680000 acres, accounting for half of the total cultivated area, accounting for two-thirds of the grain output, Liaoning Province is one of the major rice areas. In recent years, with the increase of fertilizer amount of fertilizer and the improvement of fertilization method, the rice production is greatly increased. The current fertilization of rice is mainly nitrogen fertilizer. Nitrogen application is reasonable, not only the level of fertilizer utilization issues, and is directly related to the number of rice yield one of the key issues. Over the years, we used chemical analysis of water