Abstract:

Under field condition, the effects of plant density on photosynthetic characteristics and yield of summer-planting peanut were studied by using the technology of film mulching cultivation. The net photosynthesis rate, intercellular CO2 concentration and stomatal conductance were measured with Li-6400 Portable Photosynthesis System with an open flow gas exchange system. Among all treatments, the leaf area index, the net photosynthesis rate, as well as the number of pods per plant, seed weight, pod yield, economic coefficient were all increased mostly at the planting density 15.0×104 holes/hm2. Therefore, under the conditions of this study, the suggested plant density would be 15.0×104 holes /hm2 for summer-planting peanut.