title: [Research on output and quality of Panax notoginseng and annual change characteristics of N, P and K nutrients of planting soil under stereo-cultivation].
abstract: The output and agronomic characters of 3-year-old Panax notoginseng cultured under stereo structure (upper, middle and down layers) were investigated, and the annual change of N, P and K of its planting soil were also studied. Results showed that, compared with field cultured Panax notoginseng, growth vigour and output of stereo-cultivation were significantly lower. But the total production of the 3 layers was 1.6 times of field. The growth vigor and production of P. notoginseng was in the order of upper layer > middle layer > down layer. The content of ginsenoside in rhizome, root tuber and hair root of P. notoginseng was in the order of upper layer > field > middle layer > down layer. Organic matter content and pH of stereo-cultivation soil decreased with the prolonging of planting time, which with the same trend of yield. Organic matter content of stereo-cultivation soil was significantly higher than field, but the pH was significantly lower. Contents of total and available N, P and K in stereo-cultivation soil and field decreased with the prolonging of planting time. The content of N and P were in the order of upper layer > middle layer > yield > down layer, the content of K was in the order of upper layer > middle layer > down layer > yield. Compared with field, the proportion of N and P in the organ of underground (rhizome, root tuber and hair root) of upper layer were increased, while decreased in middle and down layers. Proportion of K in underground decreased significantly of the 3 layers. In conclusion, the agronomic characters and production of stereo-cultivation were significantly lower than that of yield. But the total production of the 3 layers were significantly higher than field of unit area. And the aim of improving land utilization efficiency was achieved. Nutritions in the soil of stereo-cultivation were enough to support the development of P. notoginseng, which was not the cause of weak growth and low production. The absorbing ability of P. notoginseng to N, P and K nutrients was decreased by stereo-cultivation mode. So, improve the growth vigour of P. notoginseng from the perspective of adjusting the stereo-cultivation mode so as to improve the nutrient absorption capacity is the future direction.
authors.forename: Chun-mei
authors.initials: CM
authors.lastname: Huang
authors.forename: Xiu-ming
authors.initials: XM
authors.lastname: Cui
authors.forename: Lei
authors.initials: L
authors.lastname: Lan
authors.forename: Wei-dong
authors.initials: WD
authors.lastname: Chen
authors.forename: Cheng-xiao
authors.initials: CX
authors.lastname: Wang
authors.forename: Xiao-yan
authors.initials: XY
authors.lastname: Yang
authors.forename: Da-hui
authors.initials: DH
authors.lastname: Lu
authors.forename: Ye
authors.initials: Y
authors.lastname: Yang
mesh_terms: D005502:Food; D006863:Hydrogen-Ion Concentration; D009584:Nitrogen / Q000032:analysis*; D053723:Panax notoginseng / Q000254:growth & development*; D010758:Phosphorus / Q000032:analysis*; D011188:Potassium / Q000032:analysis*; D012987:Soil / Q000737:chemistry*
chemical_list: D012987:Soil; D010758:Phosphorus; D009584:Nitrogen; D011188:Potassium