豫北地区‘郑麦7698’适宜播期播量的研究

为了筛选适宜的播期、播量,使良种良法配套,充分发挥‘郑麦7698’在豫北地区的丰产性,研究了‘郑麦7698’在不同播期播量下的产量及产量构成。结果表明：随着播期的延迟,小麦成穗数逐渐减少,穗粒数逐渐增加,播期对千粒重的影响未达显著水平,产量随播期的推迟而逐渐降低。播量越大,小麦的成穗数越高,穗粒数越少,播量对千粒重的影响未达到显著水平,而播量最大的处理（225 kg/hm2）产量最高。‘郑麦7698’产量最高的组合为播种期10月10日,播量225 kg/hm2,而播期为10月10日播量为187.5 kg/hm2的组合次之。总之,‘郑麦7698’在豫北地区的适宜播种期范围为10月5日至10日,相应的播量为225 kg/hm2左右。

Research of Suitable Sowing Time and Seeding Quantity of ‘Zhengmai7698＇ in North Henan

In order to clarify the suitable combination of sowing time and seeding quantity to make it match with good breed, and better encourage fertility of ‘ Zhengmai7698＇ in North Henan, we studied yield formation under different sowing time and seeding quantity. The results showed that： with the sowing time delay, efficient panicle of unit-acreage reduced, kernel number increased, sowing time was not significant affect on grain weight, with the delayed sowing, yield gradually reduced. With the increase of seeding quantity, efficient panicle of unit-acreage increased, kernel number reduced, sowing time was not significant affect on grain weight, the highest seeding quantity treatment （225 kg/hm2） had the maximum yield. The combination of ‘ Zhengmai 7698＇ had the highest yield for sowing time was October 10th, sowing quantity was 225 kg/hm2, when sowing time was October 10th, and sowing quantity was 187.5 kg/hm2, the yield was second. According to the grain yield of all the combinations of sowing time and planting density, October 5th to 10th was the best sowing time of‘ Zhengmai 7698＇ in north Henan, with the seeding quantity was about 225 kg/hm2.