Application Effect of Special Foliage Fertilizer on Dendrobium candidum Wall.ex Lindl.
BAI Mei-fa(Southwest Guizhou Vocational and Technical College for Nationalities,Xingyi,Guizhou 562400)
[Objective] The study was to provide the technical basis for industrialization development of Dendrobium candidum Wall.ex Lindl..[Method] With tissue culture seedlings of D.candidum as the materials,after 15 d transplanting,they were sprayed with special foliage fertilizer(N∶P2O5∶K2O=25∶13∶13,the total amount of N,P and K was 51%,and that of B,Fe,Zn,Cu,Mn and Mo was 1%),total 5 times of once every 7 d,and with the treatment spraying clear as CK.The effets of special foliage fertilizer on single plant fresh weight,stem polysaccharide content,leaf area and chlorophyll content of D.candidum were studied.[Result] Spraying foliar fertilizer could promote the elongation growth of stem-leaf of D.candidum,and in the treatment of spraying foliar fertilizer,the stem node and diameter of D.candidum lengthening and overstriking,and the average single plant fresh weight(6.6 g) was obviously higher than that of CK(4.45 g),but polysaccharide content(167.45 mg/g) was a little lower than that of CK(172.4 mg/g).After spraying foliar fertilizer,the average leaf area and chlorophyll content of D.candidum were 2.35 cm2 and 1.25 mg/g higher than that of CK resp..[Conclusion] Spraying special foliage fertilizer long time could promote stem-leaf elongation growth of D.candidum,and increase its stem-leaf ratio,yield and leaf area.
【CateGory Index】： S567.239