特早熟玉米夏播试验

An Experiment of Summer Seeding Early-ripe Corn

１９９６ 和１９９８ 年对特早熟玉米进行了夏播试验。初步结果表明，适宜山西省中北部地区麦茬夏播的玉米品种，生育期为８０ ～８５ｄ ，同时还必须具有较强的抗大、小斑病和矮花叶病的特性。特早熟玉米同一品种夏播比春播生育期缩短８ ～９ｄ ，杂交种比其亲本（ 自交系） 早熟３ ～４ｄ 。夏播时由于温差大，玉米子粒饱满，千粒重高。

Some experiments on summer seeding early-ripe corn were carried out in 1996 and 1998. The experiments showed that the best maize varieties for summer seeding after wheat harvesting in the middle and north parts of Shanxi are those with the growing period of 80～85days and resistance to leaf blight, leaf spot, and maize dwarf mosaic. To the same early-ripe maize variety, the growing period is 8～9 days shorter sowing in summer than in spring. The growing period of hybrid seed is 3～4days shorter than its parents. The grain yield of summer seeding corn is higher than sewed in spring due to the large difference of temperature round the clock, pump grain, and high weight of thousand grains.