| Konjac (Amorphophallus Blame) was originated in northern partial Asia Indo-China Peninsula and southern Yunnan, this zone was a tropical climate, its ancestor was tropical forest herb lower species which grown in a semi-shady environment, As such, shading-cultivation are often used in the konjac production. Konjac intercropping with other crops for shading-cultivation was conducted more research by predecessors, but the research about effect of light intensity on konjac photosynthesis under intercropping shading-cultivation is a little,so far, the research about effect of light quality on konjac photosynthesis under intercropping shading-cultivation is not been reported. Therefor,in this paper,through different colors film to create different light quality environment,and through a variety of shading ways to create different light intensity environment, systematically studied relationship about light intensity and quality with konjac growth and yield, created the new cultivating technology that merged the traditional shading and protection planting. The main results were as follows:1. Film treatment could change the growth environment of konjac significantly. Improve the greenhouse temperature, prompted konjac early emergence 15d, delay 30d pour seedlings. After emergence, increase the amount of greenhouse ventilation and timing quantitative water, to ensure that in the hot summer the greenhouse humidity, temperature, CO2 concentration in the konjac normal growth range.Film treatment can affect the growth and yield of konjac significantly.The konjac plants under red film were higher in seeding index and with longer and thicker petiole, the konjac plants under blue film were lower in seeding index and with shorter and thinner petiole.The yield under red film at harvesting stag were highest, among them,the yield of Amorphophallus albus were 1937.48kg/667m2,which increased37.70% compared with the control, the yield of Amorphophallus konjac were 2296.39kg/667m2,which increased31.93% compared with the control.Film treatment can affect the chlorophyll content of konjac significantly. The chlorophyll content under blue film were highest, among them, the chlorophyll content of Amorphophallus albus were 8.34mg·g-1DW, the chlorophyll content of Amorphophallus konjac were 8.42mg·g-1DW. The chlorophyll content of Amorphophallus albus under blue film, purple film, red film, green film, white film was 32.17%、29.31%、25.51%、19.33% and13.79% higher than the control, the chlorophyll content of Amorphophallus konjac under blue film, purple film, red film, green film, white film was 26.05%、22.60%,25.51%、22.16% and 14.97% higher than the control.Film treatment can affect the photosynthetic rate of konjac significantly. The photosynthetic rate under red film were highest, the photosynthetic rate of Amorphophallus albus and Amorphophallus konjac were 13.24mg·dm-2·h-1 or 15.26mg·dm-2·h-1 respectively.The photosynthetic rate of Amorphophallus albus under blue film, purple film, red film, green film was increased 84.92%,34.78%,33.52%,31.15% compared with the control and increased 63.86%、 19.43%、18.32%、16.21% compared with white film. The photosynthetic rate of Amorphophallus konjac under blue film, purple film, red film, green film was increased 63.38%、31.16%、29.98%、 29.34% compared with the control and increased 50.93%、21.05%、20.08%、19.37% compared with white film.Film treatment can affect the quality of konjac significantly. The KGM content and soluble sugar content under red film were highest, the soluble protein content and starch content under red film were lower. The KGM content under red film increased 9.83%、30.00%、35.46%、 4.47%,18.24%(Amorphophallus albus) and11.71%、33.97%、32.35%、5.25%、 22.87%(Amorphophallus konjac) compared with white film, purple film, green film,blue film and CK. The soluble sugar content under red film increased 12.28%、11.06%、14.29%、2.81%、37.63% (Amorphophallus albus) and 9.45%、10.32%、9.45%、22.06%、16.81%(Amorphophallus konjac) compared with white film, purple film, green film,blue film and CK. The soluble protein content under red film increased-13.10%、-12.10%、-8.62%、-18.13%、6.71%(Amorphophallus albus) and-8.67%、-9.65%、-6.30%、-14.83%、3.87%(Amorphophallus konjac) compared with white film, purple film, green film,blue film and CK. The starch content under red film increased-13.43%、-4.17%、-17.99%、-1.94%、5.10%(Amorphophallus albus) and-11.35%、0.62%、-17.00%、-1.04%、 6.19%(Amorphophallus konjac) compared with white film, purple film, green film,blue film and CK.2. Shading treatment can affect the growth and yield of konjac significantly. The konjac plants under ZZ2 (shading-nets 75% shading) were higher in seeding index and with longer and thicker petiole, the konjac plants under ZZ1 (shading-nets 90% shading) were lower in seeding index and with shorter and thinner petiole. The yield under ZZ2 at harvesting stag were highest, among them,the yield of Amorphophallus albus were 1816.78kg/667m2,which increased29.12% compared with the control and increased25.99% compared with YZ3 ("Amorphophallus-corn" intercropping 2%shading), the yield of Amorphophallus konjac were2191.57kg/667m2,which increased 25.91% compared with the control and increased 25.23% compared with YZ3. The yield under ZZ1 at harvesting stag were lowest, among them,the yield of Amorphophallus albus were 1213.31kg/667m2,which reduceed 13.77% compared with the control, the yield of Amorphophallus konjac were 1461.06kg/667m2,which reduceed 16.06%compared with the control.Shading treatment can affect the chlorophyll content of konjac significantly. The chlorophyll content of Amorphophallus albus under ZZ2 was highest,and it was 7.44mg-g-1DW, The chlorophyll content of Amorphophallus albus under YZ1 ("Amorphophallus-corn" intercropping 50% shading), YZ2 ("Amorphophallus-corn" intercropping 45% shading), YZ3, ZZ1, ZZ2, ZZ3 (shading-nets 60% shading) was increased 14.53%、13.11%、1.27%、-0.16%、17.54%、16.59% compared with the control respectively. The chlorophyll content of Amorphophallus konjac under ZZ3 was highest,and it was 7.47mgg-11DW, The chlorophyll content of Amorphophallus albus under YZ1, YZ2, YZ3, ZZ1, ZZ2, ZZ3 was increased 11.08%、10.18%、0.61%、-5.84%、11.83%、 11.68% compared with the control respectively.Shading treatment can affect the photosynthetic rate of konjac significantly. The photosynthetic rate of Amorphophallus albus under ZZ2 was highest,and it was 10.74mg-dm-2·h-1, The photosynthetic rate of Amorphophallus albus under YZ1, YZ2, ZZ1, ZZ2, ZZ3 was increased 48.05%、44.91%、-63.47%、60.78%、54.79% compared with the control and increased 44.59%, 41.52%、-64.33%、57.02%、51.17% compared with YZ3. The photosynthetic rate of Amorphophallus konjac under ZZ2 was highest,and it was12.78 mg-dm-2·h-1, The photosynthetic rate of Amorphophallus konjac under YZ1, YZ2, ZZ1, ZZ2, ZZ3 was increased 9.76%、27.19%、-73.66%、36.83%、34.48% compared with the control and increased 25.21%、22.73%、-74.59%. 32.03%、29.75% compared with YZ3.Shading treatment can affect the quality of konjac significantly. The KGM content,soluble sugar content and soluble protein under ZZ2 were higher,and under ZZ1 were lower. The KGM content,soluble sugar content and soluble protein of Amorphophallus albus under ZZ2 was increased 12.38%,44.09%,20.70% compared with the control. The KGM content,soluble sugar content and soluble protein of Amorphophallus konjac under ZZ2 was increased 12.77%,29.41%, 19.95%compared with the control. The KGM content,soluble sugar content and soluble protein under ZZ2,ZZ3 was higher than YZ2,YZ3,ZZ1 significantly. The KGM content,soluble sugar content and soluble protein underYZ2,YZ3 was higher than YZ3,ZZ1,CK significantly. No significant differences between the starch content of each treaments.3. Therefore, by the test results of this analysis and research, under red film and ZZ2 (shade net 75% shading) the konjac plant petiole was longer, thicker, seedling index was higher, a large amount of plant growth, leaf photosynthesis was stronger throughout the growing season with a strong growth advantage, and ultimately good yield of high quality bulbs. To understand the effects of different light quality and intensity of konjac growth and yield, especially for konjac cultivation protected cultivation how to provide some reference light control. |
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