摘要
Abstract
Taking double-high soybean variety Mufeng No. 7 as material, the effects of fertilization level and planting density on photosynthetic characteristics were investigated in a split-plot experiment with 5 fertilizer levels（ 300,345,390,435,480 kg-hm2）and 5 planting densities（ 30×104、32×104、34×104、36×104 38×104 plants.hm2 ）. The results showed that： the fertilization levels and planting densities had little impacts on the chlorophyll a,chlorophyll b and total chlorophyll contents for the leaves of Mufeng No. 7,and their contents were mainly determined by the characteristics of the species. Within a certain range, the leaf area index of Mufeng No. 7 increased as the fertilizer application and planting density increased with the peak value for the 435 kg.hm 2 of fertilizer application and 36 ）〈 104 plants.hm 2 of planting density,respectively. During the flow ering period,the photosynthetic rate decreased with the gradual increase of plant density. After the planting density was more than 32 × 104 plants·hm^- 2 the photosynthetic rate increased gradually as the planting densities increased while the photosynthetic rate declined as the fertilizer application increased during the podding period. With the increase of fertilizer application, the transpiration rate first increased and then decreased during the flowering period, while decreased gradually during podding period. In the range of 30 × 104 - 36 ×104 plants· hm ^2 for the planting density,the transpiration rate for leaves of Mufeng No. 7 was reduced gradually as the planting density increased during the podding period.关键词
施肥水平/栽培密度/双高大豆/牡丰7号/光合特性Key words
fertilization level/planting density/double high soybean/Mufeng No. 7/photosynthetic characteris tics分类
农业科技
