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豫东黄潮土区为黄淮海平原夏玉米主要生态类型区之一。近年来,该区土壤耕层速效钾含量呈明显下降趋势,平均由第二次全国土壤普查(80年代初)时的150ppm左右降至90ppm左右。从某种程度上看已经成为作物高产稳产的限制因子。为此,我们于1989～1990年度,在冬小麦施钾有显著效果的两合土类型区,有针对性地进行了夏播玉米制种应用钾肥的试验研究,通过较系统地观测钾肥对夏玉米制种有关生理生态性状的影响,肯定了钾肥的显著增产作用,并摸索出适于亩
The Yellow-fluvial region in eastern Henan is one of the main ecological types of summer maize in the Huang-Huai-Hai Plain. In recent years, the content of available potassium in soil plowed down obviously in this area, decreasing from about 150ppm in the second national soil survey (early 1980s) to about 90ppm. To some extent, it has become a limiting factor for the high and stable crop yield. To this end, we conducted a pilot study on the application of potash fertilizer for summer sowing corn in a two-cropping area with significant effect of applying potassium in winter wheat from 1989 to 1990. By systematically observing the effect of potash fertilizer on summer maize Seed production on the impact of physiological and ecological traits, affirmed the significant increase of potash production, and explore suitable for mu