Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 8, Issue 3, 2006; Page No.(633-637)

EFFECT OF PHOSPHORUS SOURCE AND GLOMUS MOSSEAE ON GROWTH, NUTRITION AND BIOCHEMICAL CONSTITUENTS OF CAMELLIA SINENSIS (L) 0.KUNTZE. GROWN UNDER FIELD CONDITIONS

S. RAJESH KUMAR AND T. SELVARAJ

Abstract

A field experiment was conducted to study the response of tea (Camellia sinemis(L) 0.Kuntze var. UPASI-9) pre- inoculated with Glonius mosseae at four different phosphorus levels (0, 20, 40, 60 kg P205 ha-')to examine their effect on plant growth,leaf yield, biomass, nutrition and leaf biochemical constituents. The effect of inoculation of tea with Gloinus mosseae in combination with 20 kg P205 ha-' was similar in terms of plant growth, leaf yield, biomass, nutrition and leaf biochemical constituents with the control, which received the full dose of phosphatic fertilizer (60 kg P2O5 ha-1) without inoculation. This indicated the possibility to reduce phosphate fertilization in tea var. UPASI-9 cultivation by 65%. The root colonization was significantly higher in AM inoculation at the lower levels Of P compared to uninoculated control receiving the full dose of P- fertilizer (60kg P205 ha-1), suggesting that low phosphorus levels in soil promote better AM fungal symbiosis in tea var. UPASI-9. The positive effect of mycorrhizal inoculation decreased with increasing phosphorus level above 20 kg P205 ha", due to decreased percent root colonization and spore count at higher phosphorus levels. The present study revealed that the inoculation of tea var. UPASI-9 with indigenous Glonnts mosseae can become a great boon to the agriculturists, in minimizing the requirements of costly phosphate fertilizer in tea cultivation.

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