不同生态条件下‘中地77’对密度和施肥量的反应

通过研究‘中地77’对密度和施肥量的反应,旨在进一步挖掘该品种在辽宁省的生产潜力,为其大面积生产提供参考。试验采用裂裂区设计,肥料为主区,密度为副区,品种为副副区。肥料处理设常量施肥、高量施肥2个水平。密度设5个水平,即45000、52500、60000、67500、75000株/hm2。随机区组设计,3次重复。结果表明：‘中地77’的耐密性较强,密度为60000株/hm2产量最高;不同地区相比,辽北地区产量较高,平均比辽西高25.6%;在辽西地区,增加施肥量有明显的增产效果,最高可增产28.8%,而在辽北地区,增加施肥则无明显的增产效果。综合考虑肥料和密度因子。辽西地区：高量施肥条件下,密度为60000株/hm2产量最高（8867.5 kg/hm2）;辽北地区：常量施肥条件下,密度为60000株/hm2产量最高（9908.8 kg/hm2）。

Responses of ＇ Zhongdi No. 77＇ to Density and Fertilization in Different Ecological Regions

This experiment was conducted to research the responses of ＇Zhongdi No. 77＇ to density and fertilization, in order to improve the productivity of ＇ Zhongdi No. 77＇ and to provide references for the large- scale production of ＇Zhongdi No. 77＇ in Liaoning Province. The test used re-splitting action design： fertilizer factor was assigned to the main plot, density factor to the subplot and eultivar to the sub-subplot. Set fertilizer treatment for two levels as normal fertilizer and high fertilizer. Set density factor for five levels as 45000, 52500, 60000, 67500 and 75000 plant/hm2. The experiment adopted randomized block design and 3 replications. The results showed that ＇Zhongdi No. 77＇ had higher density-tolerant, and its yield reached the maximum at the density of 60000 plant/hm^2. On average, the yield of north was 25.6% higher than that of the west in Liaoning Province. In western Liaoning Province, the yield increased significantly with an increasing application of fertilization, the maximum yield increased by 28.8%, In the north of Liaoning Province, increased fertilization had no obvious effect on the yield. In the west of Liaoning Province： under the higher fertilization level, the maximum yield was got at 60000 plant/hm2（8867.5 normal fertilizer level, the maximum yield was got at 60000 plant/hm2（9908.8 kg/hm2）. In the north： under the kg/hm2）.