种植密度和施氮量对桂育9号农艺性状及产量的影响

为了探讨水稻品种桂育9号在广西中西部地区的最佳种植密度和施氮量,采用2因素4水平裂区试验设计,测定相关农艺性状和叶面积指数及产量。结果表明,种植密度对最高苗数和结实率有极显著影响（P<0.01）,对有效穗数和千粒重有显著影响（P<0.05）;施氮量对农艺性状及产量影响不显著,A3B2处理的农艺性状最佳,产量最高（7 550kg/hm ²）。在广西中西部地区种植桂育9号时,种植密度以3.0×10 ⁵蔸/hm ²、每蔸2苗、施氮量165kg/hm ²为宜。

Effects of Nitrogen Fertilizer Application Rate and Planting Density on Agronomic Traits and Yield of Guiyu 9

In order to explore the best planting density and nitrogen fertilizer application rate of rice variety Guiyu 9 in the central and western regions of Guangxi, a 2-factor and 4-level split plot design was used to determine the related agronomic traits, leaf area index and yield. The results showed that planting density had significant effects on the maximum seedling number and seed setting rate (P<0.01), effective panicle number, and 1000-grain weight (P<0.05). Nitrogen fertilizer application rate had no significant effects on agronomic traits and yield. A3B2 plot had the best agronomic traits, and the highest yield (7 550kg/hm ²). When Guiyu 9 was planted in the central and western regions of Guangxi, the suitable planting pattern was a combination of planting density of 3.0×10 ⁵holes/hm ², 2 plants per hole and 165kg/hm ² of nitrogen applicationrate.