Effect of Fertilization on Photosynthetic Features in Phyllostachys pubescens

摘要

The changes of leaf area index (LAI), leaf photosynthetic pigment content, photosynthetic rate of Phyllostachys pubescens in one leaf development cycle (two years) under different fertilization (no fertilization: CK, fertilization at the leave-expansion period: T1, fertilization at the end of August: T2) were studied. The bamboo showed a high LAI potential under T1, which was 14.5% and 23.9% higher than that of T2 and CK, respectively. Fertilization significantly promoted the synthesis of chlorophyll. The average SPAD (soil and plant analyzer development) achieved the highest values under T1, which was 73% and 17.8% higher than that of T2 and CK, respectively. Fertilization caused diurnal changes in photosynthetic rate during the entire leaf development period, and the photosynthetic rate under T1 was significantly higher than that of T2 and CK. The effect of fertilization on photosynthetic rate varied seasonally, especially for T1.