品种与密度配置对高油大豆光合特性和产量的影响

Effects of Variety and Plant Density on Photosynthetic Characteristics and Yield of High-Oil Soybeans

摘要:

为研究东北地区新选育的不同高油大豆品种的适宜种植密度，采用二因素裂区试验设计，分别选用4种新育成的高油大豆品种和5个播种水平，分析不同品种与密度配置对高油大豆光合特性及其产量的影响。结果表明，吉育2907的适宜种植密度为30万株/hm²，吉育269的适宜种植密度为20万株/hm²，吉育2514和吉育3517的适宜种植密度为25万株/hm²。该种植密度下，各高油品种生育后期的光合速率、蒸腾速率、干物质积累量、荚数、茎重、荚重、粒重、株粒数和产量均表现最好。

Abstract:

To study the suitable planting density of different newly bred high-oil soybean varieties in Northeast China, a two-factor split-plot experimental design was adopted. Four newly bred high-oil soybean varieties and five planting density levels were selected to investigate the effects of different varieties and density configurations on the photosynthetic characteristics and yield of high-oil soybeans. The results showed that the suitable planting density for Jiyu 2907 was 300,000 plants/ha, for Jiyu 269 was 200,000 plants/ha, and for Jiyu 2514 and Jiyu 3517 was 250,000 plants/ha. Under these planting densities, the photosynthetic rate, transpiration rate, dry matter accumulation amount, number of pods per plant, stem weight, pod weight, grain weight, number of grains per plant, and yield of each high-oil soybean variety exhibited the best performance at the late growth stage.