为明确不同树形对丰水梨光合特性的影响,对3种树形(开心形、小冠疏层形、棚架形)的特性进行了测定.结果表明:3种树形的净光合速率(Pn)日变化相似,均表现为不对称双峰曲线,首峰出现在11时,次峰出现在15时左右.棚架形净光合速率最高,树冠不同部位光合速率差异最小.%The photosynthesis characteristics of Hosui pear were analyzed under three kinds of tree shapes (open center shape, small and sparse canopy shape, trellis shape). The results showed that the diurnal variation of net photosynthetic rate (Pn) of three tree shapes was asymmetric double peak. The first peak appeared at 11; 00, and the second appeared at about 15:00. The trellis shape was the best in net photosynthetic rate and had the minimum differences in different parts of canopy.
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