论文部分内容阅读
本试验采用随机区组设计,研究氮肥失衡对玉米灌浆速率及产量的影响,结果表明,与常量氮肥处理相比,无氮肥处理的干物重受氮肥影响很大,吐丝后15 d,干物重比其低37.8%,后期相差更大;除穗行数外,其他因素及产量的差异达到极显著水平,产量比其低68.3%,子粒氮素累积量比其低76.5%,灌浆速率和平均灌浆速率减小,最大灌浆速率出现的时间提前,活跃灌浆期缩短13 d左右;而与常量氮肥处理相比,高量氮肥处理的干物重受氮肥影响较小,可增加的干物重有限,产量仅比其高4.2%,子粒氮素累积量比其高19.5%,最大灌浆速率和平均灌浆速率有所提高,最大灌浆速率出现的时间提前,活跃灌浆期缩短。
In this study, randomized block design was used to study the effect of nitrogen imbalance on grain filling rate and yield of maize. The results showed that compared with the conventional nitrogen application, the dry matter weight of the no-nitrogen treatment was greatly affected by nitrogen fertilizer. After 15 days of spinning, Which is 37.8% lower than that in the late stage. The difference between other factors and yield is extremely significant except for the number of ear rows, the yield is 68.3% lower than that and the grain nitrogen accumulation is 76.5% lower than that. Grain filling rate and average The filling rate decreased and the maximum filling rate appeared ahead of time, and the active filling period shortened by about 13 days. Compared with the constant nitrogen fertilizer treatment, the dry matter weight of the high nitrogen fertilizer treatment was less influenced by the nitrogen fertilizer, the dry matter weight increased but the yield increased Only 4.2% higher than that of the other treatments. Nitrogen accumulation in grain was 19.5% higher than that of the control. The maximum filling rate and average filling rate were increased. The maximum filling rate appeared earlier and the active filling stage shortened.