Abstract: Through field trials comparing different planting density the photosynthetics characteristics of Cerasus humilis, to discuss will be the introduction to the Hanyuan areas suitable for density, provide the basis for production of high yield cultivation. The sample is divided into three parts, respectively set the planting density is 1.0 m×1.0 m (T1), 0.5 m×1.0 m (T2) and 0.5 m×0.5 m (T3).Test the Cerasus humilis for photosynthesis. The result of the research showed that different density of Cerasus humilis leaves the diurnal changes of Pn curves were typical of the Shuangfeng curve. There was a clear lunch break phenomenon. The Pn and Gs of Cerasus humilis peaks respectively at 10:00 and 16:00,and the valley value appears at 14:00. The Tr peak of T1 was at 10:00 and 16:00,and the Tr peak of T2 and T3 appears at 10:00 and 14:00,and the valley value appears at 12:00.The three dimensions of WUE day change peaks at 12:00 and 16:00,and the valley value appears at 14:00.Ci was a concave curve. In the light response,T2's AQY and Rd were the largest, with the lowest LSP in T1 and the lowest LCP.In CO₂ response, the CCP and Rp of T1 were the largest. Different density chlorophyll content of a/b was T2 > T1 > T3. In summary, three different planting densities, 1.0 m×0.5 m of net photosynthetic rate was higher, the use of weak light and low concentration CO₂ rate was the highest, which indicated that the density of Prunus humilis synthetic efficiency was the highest.Therefore,it is suggested to plant Cerasus humilis in Hanyuan as 1.0 m×0.5 m.

Key words: Cerasus humilis, Density, Introduction, Photosynthetic characteristics, Chlorophyll

CLC Number: 

• S662.01