title: [Effects of "3414" fertilizer application on the yield of Fagopyrum cymosum].
abstract: OBJECTIVE
  To study the effects of different fertilizer applications on the yield of Fagopyrum cymosum and explore the hese scheme for getting the maximum yield on purple soil in the Chongqing-west.
  
  
  METHODS
  Experiment with implementing plan of "3414"; The quality Assessment by the contents of bipoly-chrysanthemin; The data process program under the Excel 2003, SPSS 13.0, MatlaB 7.0, Word 2003 environments.
  
  
  RESULTS
  Various fertilizer combinations had different transformation efficiency which the N3P2K2 combination was the maximum 97.09% and the NOP2K2 combination was the minimum 4.32%; The NOP2K2 combination had the lowest yield except of the bland group which was 186 kg/667 m2; When the N fertilizer Rate was controlled in the level of 15 kg/667 m2 The yied had no obvious change as the increase of another two kinds fertilizer rate; Three kinds of function could better reflect the relationships between fertilizer and yields, which all of the R2 value were above 0.88; The best one was N K function with the maximum R2; The blank group had maximum content 8.67% of bipoly-chrysanthemin and the content had a little decrease as the increase of N or K, but all higher than 7.14% which were planted in Bei Jing area.
  
  
  CONCLUSIONS
  Various fertilizer combinations influenced the transformation efficiency of N, P, K;N is the key fertilizer on purple soil; Reconmentation funtion was N,K function which could be as the guiding function; F; Fertilizer would not influence the quality of Fagopyrum cymosum.
authors.affiliation: Key Laboratory (Ministry of Education) of Eco-environments of Three Gorges Reservoir Region, Chongqing Key Laboratory of Plant Ecology and Resources Research for Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing 400715, China. liyanan@swu.edu.cn
authors.forename: Gui-qiang
authors.initials: GQ
authors.lastname: Li
authors.forename: Ping
authors.initials: P
authors.lastname: He
authors.forename: Chun-ping
authors.initials: CP
authors.lastname: Zhang
authors.forename: Yi-feng
authors.initials: YF
authors.lastname: Zhang
authors.forename: Shi-jun
authors.initials: SJ
authors.lastname: Hu
mesh_terms: D000383:Agriculture / Q000379:methods*; D018533:Biomass; D002130:Calcium Phosphates / Q000737:chemistry / Q000378:metabolism; D019612:Fagopyrum / Q000254:growth & development* / Q000378:metabolism; D005308:Fertilizers; D016014:Linear Models; D009584:Nitrogen / Q000737:chemistry / Q000378:metabolism; D011189:Potassium Chloride / Q000737:chemistry / Q000378:metabolism; D011786:Quality Control; D027343:Rhizome / Q000254:growth & development* / Q000378:metabolism; D012987:Soil / Q000032:analysis*
chemical_list: D002130:Calcium Phosphates; D005308:Fertilizers; D012987:Soil; D011189:Potassium Chloride; D009584:Nitrogen