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Kidney fern (Nephrolepis auriculata (Linn.) Trimen) wolf the tail the fern (Davallia mariesii), a beautiful fern (Nephrolepis cv.) For the test material to explore the different shading treatments (set of four kinds of shading treatments, translucent were CK (77%), T1 (50%), T2 (28%), T3, (5%)) leaf traits (leaf length, leaf width and leaf area) and physiological characteristics (net photosynthetic rate, radiation intensity, stomatal conductance, transpiration rate and intercellular CO 2 concentration) and plant ornamental characteristics (plant type and fullness, leaf color, brown leaf weight) affect the results show that: 1. Shading a significant impact on the test fern leaf traits. Increasing shading, three fern leaf length, leaf width and leaf area of ??different changes, so as to control the CK minimum. Fern and beautiful fern showed a trend with shade larger increase in the strength of the blade length, width and area of ??relative increase gradually. Wolf tail the fern slightly different blade length, width and area with the weakening of the light intensity, showing the trend of increased and then decreased, and reached the maximum 28% of full light conditions. 28 to 5% of full light, blade length, width and area are reduced. Blade length, width and shade gradient analysis of variance (Table 4-1), the results showed that the the above traits differences were significant level (P <0.05); 4 processing, T2, T3 levels leaf growth amount significantly higher, the difference reached a significant level (P <0.01). 2. Shading fresh weight per unit area of ??the test leaves of ferns. The beautiful fern fresh weight per unit area increases with increasing shade degree, in order to control the CK minimum; beautiful fern T1, T2 and T3 levels, respectively, an increase of 2.74% compared with the control CK, 9.28% and 14.53%. Kidney fern and wolf tail fern fresh weight per unit area as the the shading degree of increase performance first increased and then decreased in descending order: T2> T3> T1> CK. 3. Three viewing fern chlorophyll content increased with increasing shading, the content of chlorophyll (T) in descending order of kidney fern> wolf End fern beautiful fern. Chlorophyll a / b value with the intensity trend performance is more consistent, a / b value of the maximum light intensity at 77%, 5% light of the lowest. Each shade gradient under beautiful fern a / b ratio is greater than kidney fern, fern greater than the wolf tail fern. On the three ornamental fern chlorophyll content (T) and chlorophyll a / b content correlation analysis showed that: the kidney fern chlorophyll content (T) and chlorophyll a / b the correlation coefficient is 0.8272, reached a significant level, while the wolf tail The fern and graceful fern reach very significant level, the correlation coefficient of 0.8582 and 0.9938, respectively. 4. Shading had an impact on the photosynthetic characteristics of three ornamental fern. The four kinds of shade under the processing conditions, the kidney fern and the wolf tail fern Photosynthetic diurnal curve showed a bimodal curve. Beautiful fern in addition to T3 treatment showed a single peak curve, in the middle did not occur photoinhibition day photosynthetic rate is the highest point 9:00 ~~ 10:00 in the morning; CK (control) and T1, T2 treatment had obvious \5. For solar energy utilization, ornamental fern with increasing shade intensity increased. In a certain range of shade from the the absolute light energy utilization point of view, three ornamental fern shade adapt to the size of the order: kidney fern> beautiful fern wolf tail fern. Which all the relative light intensity of 5% absolute maximum light use efficiency. 6. Diurnal variation of three ornamental fern stomatal conductance (Gs) and transpiration rate (Tr) and its diurnal variation of net photosynthetic rate similar, but are not synchronized, correlation analysis showed that the photosynthetic rate and stomatal conductance and transpiration rate there its significant positive correlation. 7. The the three ornamental fern average cell gap CO 2 concentration (Ci): trends with daily average photosynthetic rate opposite. With the increase in the degree of shading, and gradually increased. 8. Shading 3 months, because the temperature is too high, a strong light, the processing of the control (CK) Three viewing fern different dry phenomenon, the kidney fern and wolf tail fern brown leaf volume by 50%, the sensory effect of poor , so the lowest score. Wolf tail fern in the 27% and 5% of full sunlight, the leaves green shiny yellow phenomenon, plant type and elegant fullness, the best viewing experience, the highest score; while the the fern plant type dispersed in the four treatment levels, respectively varying degrees of yellow phenomenon in plant type and fullness score low; beautiful the fern leaf color yellow, and green, poor sensory effects affect the score. Three viewing shade 3 months fern suitable for growth in the 5-27% of full light conditions, and maintain good ornamental traits. The shade 6 months, three ornamental ferns viewing has also undergone a significant change. The ornamental effect of the control treatment with different degrees of increase, old leaves, yellow leaves gradually new leaves substituted to enhance the sensory effect; Three viewing fern in 28% (T2 level) due to long-term in shade low light environment, and 5% (T3 level) under all lighting conditions, new germination leaves yellow, affecting ornamental effect, score lower. 9. Three viewing from different angles on the sort of fern shade-tolerant force, the results are not the same. Three fern are very shade-tolerant plants, but the the comprehensive indicators Sort law can be considered the the a fern shade tolerant strongest, followed wolf tail fern beautiful fern shade-tolerant capability is poor.
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