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自1994年对冀中南夏玉米区种植面积较大的9个品种做了灌浆速度测定,研究发现:(1)大粒或超大粒品种灌浆时间长达5个取样阶段(每隔4天取一次样),普通粒重类型的一般为4个取样阶段,低粒重类型高赖氨酸玉米鲁单203仅有3个阶段。(2)超大粒型品种千粒干重阶段平均日增重量最高可达14g,大粒型或普通粒重型品种多在11.5-12g之间,高赖氨酸玉米鲁单203仅11.2g;秋分以后,超大粒型品种试1243千粒于重日增重仍达2.6-3.2g。(3)高赖氨酸玉米籽粒后期脱水并不缓慢,若能保证其完熟,其籽粒含水率完全降至普通玉米收获时的水平,这一点与过去的看法不同。
Since 1994, the grain filling rate of 9 cultivars with large area of summer maize in central-southern Hebei Province was measured. The results showed that: (1) the grain-filling time of large or extra large grain varieties was up to 5 sampling stages ), The average grain weight type is generally 4 sampling stages, low grain weight type lysine corn Ludan 203 only three stages. (2) The average daily weight gain of 1000-grain dry weight stage for super-large grain type is up to 14g. Large grain type or common grain weight variety is mostly between 11.5-12g, L-202 with high lysine corn is only 11.2g. After autumnal equinox , Oversized grain varieties test 1243 thousand grains in heavy daily gain is still up to 2.6-3.2g. (3) The late dehydration of high-lysine maize grain is not slow at the late stage. If it is guaranteed to be ripe, the grain moisture content of the high-lysine maize will be completely reduced to that at the time of normal maize harvest, which is different from the past.