[Effects of formula fertilization to yield and content on polysaccharide of Isatis indigotica].
OBJECTIVE
To select the optimum formula fertilization of Isatis indigotica through analyzing the yield and contents of polysaccharide of Radix Isatis for different treatments.


METHODS
An orthogonal experiment design on the basis of three factors and four levels was applied for studying the effect of formula fertilization on yield. The contents of polysaccharides were determined with phenol-witriolic colorimetry.


RESULTS
The optimum formula fertilization of Radix Isatis was carbamide 869.0 kg x hm(-2), superphosphate 1 428.6 kg x hm(-2) and potassium sulfate 0 kg x hm(-2).


CONCLUSIONS
Superphosphate can observably influence the yields of Radix Inditis. while carbamide influence the contents of polysaccharide of Radix Inditis.
Wang
Kang-Cai
KC
College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. njwkc2002@126.com
Tang
Xiao-Qing
XQ
Wu
Jian
J
Sun
Li-Ping
LP
D018533:Biomass; D011756:Diphosphates; D005308:Fertilizers; D031219:Isatis / Q000737:chemistry / Q000254:growth & development; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry / Q000254:growth & development; D011134:Polysaccharides / Q000032:analysis*; D013431:Sulfates; D014508:Urea
D011756:Diphosphates; D005308:Fertilizers; D011134:Polysaccharides; D013431:Sulfates; C031512:potassium sulfate; C033414:superphosphate; D014508:Urea