玉米的高产是每亩穗数、每穗粒数、籽粒重量三者协调发展的结果。由于玉米与其他禾谷类作物相比,每亩株数变化范围较小,且多为一株一穗。每亩适宜穗数较为稳定,通过精细播种和苗期管理等措施,争取一定的穗数也较容易。另外在一般情况下,粒重变化较小,但每穗粒数在产量构成三要素中的变化均较大。因此,主攻每穗粒数兼顾粒重成为高产栽培 The high yield of corn is the result of coordinated development of three spikelets per acre, grain number per spike, and grain weight. Because corn and other cereal crops, the number of strains per acre smaller range, and more for a panicle. Suitable spikes per acre more stable, through the fine seeding and seedling management and other measures for a certain number of spikes is easier. In addition, under normal circumstances, grain weight changes smaller, but grain yield per spike in the three elements of the composition of the larger changes. Therefore, the main grain weight per spike both high-yielding cultivation