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以早春拱棚栽培‘菊锦’大白菜为试材,无色棚膜为对照,研究有色棚膜对春大白菜光合特性、生长量及产量的影响。结果表明,在相同光量子通量密度(PFD)下,紫膜和红膜处理的气温较高,空气湿度较低;蓝膜和绿膜的气温较低,而空气湿度略高。各处理大白菜叶片光合速率(P_n)日变化呈单峰曲线型,紫膜和红膜的P_n显著大于对照,而蓝膜和绿膜与对照差异不显著;早春棚栽大白菜的光饱和点(LSP)为1133.4~1217.5μmol·m~(-2)·s~(-1),紫膜和红膜的明显高于对照,蓝膜和绿膜与对照无显著差异。各处理大白菜的光补偿点(LCP)、表观量子效率(AQY)、CO_2补偿点和饱和点差异不大,但紫膜的羧化效率(CE)显著高于对照,绿膜的明显低于对照。晴天中午红膜和紫膜的光呼吸速率(P_r)低于对照,光能利用率(LUE)高于对照。核酮糖–1,5–二磷酸羧化酶(RuBPCase)、果糖–1,6–二磷酸酶(FBPase)、景天庚酮糖–1,7–二磷酸酶(SBPase)和转酮醇酶(TK)的活性多以紫膜和红膜较高,绿膜较低。与对照相比,紫膜和红膜的生长量较大,而绿膜的较小,蓝膜与对照差异不显著。紫膜和红膜的经济学产量分别比对照高15.1%和7.8%,而蓝膜和绿膜的比对照低6.4%和15.5%。可见,紫膜和红膜可提高大白菜叶片的光能利用效率,增强光合碳同化能力,从而促进植株生长,产量明显提高;绿膜处理的结果相反。
In the early spring arch cultivation ’jujube’ Chinese cabbage as material, colorless film as a control to study the colored film on the spring Chinese cabbage photosynthetic characteristics, growth and yield. The results showed that under the same photon flux density (PFD), the temperatures of purple film and red film were higher and the humidity of air was lower; the temperature of blue film and green film was lower and the humidity of air was slightly higher. The daily variation of photosynthetic rate (P_n) of Chinese cabbage leaves showed a single peak curve, the P_n of purple and red films was significantly greater than that of the control, while the blue and green films were not significantly different from the control; the light saturation point of Chinese cabbage (LSP) was 1133.4 ~ 1217.5μmol · m -2 · s -1, the contents of purple and red films were significantly higher than that of the control, and the blue and green films were not significantly different from the control. The light compensation point (LCP), apparent quantum yield (AQY), CO 2 compensation point and saturation point of Chinese cabbage were not significantly different among treatments, but the carboxylation efficiency (CE) of purple membrane was significantly higher than that of the control and the green membrane was significantly lower In the control. The light respiration rate (P_r) of red and purple membranes was lower than that of the control at noon on sunny day, and the light utilization efficiency (LUE) was higher than that of the control. RuBPCase, FBPase, Sedum heptulose-1,7-bisphosphatase (SBPase) and transketolase Enzyme (TK) is more active purple film and red film, green film is low. Compared with the control, purple and red film growth is larger, while the smaller green film, blue film and the control difference was not significant. The economic yields of purple and red films were 15.1% and 7.8% higher than the control respectively, while the blue and green films were 6.4% and 15.5% lower than the control. It can be seen that the purple film and the red film can improve the utilization efficiency of light energy of Chinese cabbage leaves and enhance the photosynthetic carbon assimilation ability so as to promote the growth of the plant and increase the yield obviously. The green film treatment results are opposite.