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近几年来,玉米栽培有一个重要的发展趋势,即紧凑型玉米的迅速推广与规范化栽培面积的扩大。两者相辅相成,相互促进。玉米规范化栽培对各项物化技术和农艺规程均提出较高的要求,特别是对玉米杂交种的农艺性状要求严格。例如丰产性、整齐度、耐密性和耐肥性等,而紧凑型玉米具备了以上这些条件。最早在生产上应用的紧凑型玉米有烟单14、京早7号、黄
In recent years, corn cultivation has an important development trend, that is, the rapid promotion of compact corn and the expansion of standardized cultivation area. The two complement each other and promote each other. Corn standardized cultivation of the physical and chemical technology and agronomic regulations have put forward higher requirements, especially the agronomic traits of corn hybrids demanding. Such as high yield, uniformity, tightness and fertilizer resistance, etc., and compact corn with these conditions. The earliest in the production of compact corn smoke single 14, Beijing early on the 7th, yellow