Abstract:

To study the effects of different planting densities on agronomic characters, photosynthetic characteristics, yield and quality of peanut under single seed sowing condition, a new peanut variety ‘Quanhua 551’ with high yield, high quality and wide adaptability was taken as material, its optimal planting density was selected by field experiment, in order to provide a basis for popularization and application. The results showed that the plant height, dry matter accumulation, leaf area index and photosynthetic potential of peanut were positively correlated with planting density under the single seed sowing condition. The number of branches per plant, the number of fruits, the productivity and chlorophyll content of each plant were negatively correlated with the planting density. In the range of planting density, the yield increased firstly and then decreased with the increase of planting density. The yield of R₄ was the highest, which was significantly higher than that of the control. The high yield of R₄ was related to its reasonable dry matter distribution and strong photosynthetic capacity. Different density treatments had little effect on the quality of peanut kernel. R₄ was the most suitable treatment, which could not only promote the healthy development of single plant, give full play to the potential of yield increase of single plant, but also coordinate the development of individual and population, promote the increase of pod yield of population, and realize the increase of yield and efficiency of peanut.

Key words: peanut, Quanhua 551, single seed sowing, photosynthetic characteristics, yield, quality