The Protected Cultivation And Environmental Effects Of Effective Content Accumulation In Aralia Elata Var.inermis

Aralia elata var.inermis is a woody vegetable which full of rich nutrition, medicinal,economic, and ecological value, and liked by all the people. In order to study the relationship among optimal growth and harvest in conditions and environment of Aralia elata var.inermis, we chose Aralia elata var.inermis as the research material. And we use of open cultivation and off-season culture methods. In addition, by studying the component content in Aralia elata var.inermis leaf in different environments among open cultivation, understory cultivation and greenhouse cultivation and different phenophase. The objective to the experiments is to determine the best harvest time of the components, and to maximize the use of resources, and reduce the waste of resources. The main results were as follows:(1) The off-season production of Aralia elata var.inermis should select the root diameter coarser than 0.8 cm and the plant height from 30 to 45 cm, and the nursery stock should have a high degree of lignification with full terminal bud of the annual wood; then the temperature should be controlled ranging from 9 to 32 centigrade and the relative humidity should be kept between 78%~97%. In this case, the Aralia elata var.inermis would germinate after 46 days,the tender shoots reach the standard of harvesting after 24 days. It would be harvested more than 3 times yearly with the way of picking without terminal bud, and the yield of average single plant was more than 18.26 g.(2) The Vc content(except outside bud stage) in Aralia elata var.inermis leaf first decreased then increased and reached a maximum in late October, was respectively411.26mg/100 g, 483.39mg/100 g, and 566.28mg/100 g, which in different environments among open cultivation, understory cultivation and greenhouse cultivation. The Vc content in Aralia elata var.inermis leaf in different phenophase period were as follows: from May to September, open-air environment> cultivation in forest> Greenhouse environment, and in bud stage, greenhouse environment contains more Vc content.(3) The protein content in Aralia elata var.inermis leaf first decreased then increased, and the highest level in early July in open cultivation and understory cultivation, which was respectively 38.41mg/g and 37.48mg/g. The protein content in Aralia elata var.inermis leaf in greenhouse environment has been decrease rapidly, and the highest content is 42.37mg/100 g in late April. The protein content in Aralia elata var.inermis leaf in different phenophase period were as follows: from April to May, the greenhouse environment> open environment and cultivation in forest; from July to September, open environment and understory cultivation > greenhouse environment.(4) The content of each elements in Aralia elata var.inermis leaf was: Cr <Ni <Cu <Zn<Mn <Fe, and the element of Sr change greatly,which in different environments among open cultivation, understory cultivation and greenhouse cultivation. The period that appearsmaximum contents of each element in Aralia elata var.inermis leaf in different environments was: the elements of Zn, Cu, Ni appeared in late April, and the elements of Mn, Sr(open air)appeared in early July, and the elements of Fe, Sr(greenhouse and cultivation in forest), Cr appeared in late October. The overall change in the of each element content in Aralia elata var.inermis leaf was: the elements of Zn, Cu, Mn, Ni greenhouse environment> understory cultivation > open environment, and the elements of Fe, Cr in understory cultivation> open environment> greenhouse environment, and the element of Sr in greenhouse environment>open environment> understory cultivation.(5) The trend of polysaccharide content in Aralia elata var.inermis leaf in different environments was: open environment and understory environment gradually decreased at first and then increased rapidly and decreased rapidly again. The content of polysaccharide in Aralia elata var.inermis leaf reached a maximum in mid-September, was respectively25.33mg/g in open environment, and 31.79mg/g in understory environment. The content of polysaccharide in Aralia elata var.inermis leaf in greenhouse environment has a little change,the highest content appeared in late October was 19.18mg/g. The Polysaccharide content in Aralia elata var.inermis leaf for each period was: from April to August, open environment>understoy cultivation, and after mid-August was opposite.(6) The content of oleanolic acid in Aralia elata var.inermis leaf rise first and then decreased, and there were a maximum content in mid-August in open cultivation, understory cultivation and greenhouse cultivation, was respectively 18.12mg/g, 10.43mg/g, 13.47mg/g.The oleanolic acid content in Aralia elata var.inermis leaf of each period was: open environment> greenhouse environment> understory environment.(7) The content of rutin in Aralia elata var.inermis leaf in the open and under forest environment increased at first and then decreased and rise again, and reached a maximum in late October, was respectively 5.72mg/g and 2.11mg/g. The content of rutin in Aralia elata var.inermis leaf in greenhouse environment decreased gradually and rise occurs after mid-September and then at their annual maximum of 1.54mg/g in late October. Rutin content in Aralia elata var.inermis leaf of each period were as follows: open environment is much higher than the understory environment, and understory environment slightly higher than greenhouse environment.