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1986～1988年在本所防雨网室内,用盆栽方法研究了夏大豆叶片的光合速率与叶龄及水、肥条件的关系。结果表明:在山东省气候条件和本试验土壤肥力水平下,夏大豆主茎叶片的叶龄于12日左右时,光合速率达到最大值。每株施复合化肥(N:P_2O_5:K_2O=15:15:15)19.5g左右,每株每次供水1.8kg左右时,主茎叶片平均光合速率达最大值。小于或大干这三个数值时,光合速率都将迅速减小。得出了表达夏大豆光合速率与叶龄和水、肥用量关系的曲线回归方程。
From 1986 to 1988, the relationship between photosynthetic rate and leaf age, water and fertilizer conditions of summer soybean was studied by using potted method in our rain-proof mesh house. The results showed that under the climatic conditions of Shandong Province and the soil fertility level in this experiment, the leaf photosynthesis rate of summer Soybean main leaf reached the maximum at about 12 days. Each plant compound fertilizer (N: P_2O_5: K_2O = 15:15:15) 19.5g or so per plant per supply of about 1.8kg, the average main leaf photosynthetic rate reached the maximum. When the three values are smaller or larger, the photosynthetic rate will decrease rapidly. The curve regression equation expressing the relationship between photosynthetic rate of summer soybean and leaf age, water and fertilizer was obtained.