不同收获期对春玉米掖单12号产量和品质的影响

The Effect of Different Harvesting Period of Yedan-12 on Yield and Quaily

以当地主栽品种ＳＣ—７０４为对照，对正在大面积推广的紧凑型玉米掖单１２号分７次收获。研究结果表明：掖单１２号玉米达工艺成熟（乳线下移１００％）时，籽料的千粒重最高，油脂含量最高，粗蛋白含量较高，籽粒的品质最佳。改传统偏早为乳线下移１００％，并适当推迟收获期，能增加千粒重２５．６～４４．１ｇ，增产８％～１１％，而且玉米的品质有所改善；掖单１２号比ＳＣ—７０４晚成熟６～８天。

This paper deals with the relation between corn Yedan-12 harverting period and water content of seed and yield, protein content, oil content, and iodine number. Studies shows that if harvesting period is delayed until after it gets its physiological mature period (germ-line down 100% ), Yield and quality of Yedan- 12 corn can be increased respectively. The harvesting period is 6￣8 days longer than Sc- 704 which is the main planting variety in Xingjiang.