EFFECT OF INOCUATION Trichoderma spp AND ORGANIC FERTILIZER HUMIC ACID AND SEAWEED EXTRACT APPLICATION ON CITRUS ROOT STOCK GROWTH.

Abstract

This study was carried out at Baquba nursery/ Diyala governorateduring the period 5/3 - 15/10/2012 on three citrus rootstocks ( CleopatraMandarin , Swingle Citrumelo and Volkameriana Lemon . R.C.B.D was usedwith three replication ( 3 seedlings per experimental unit ). The result showed: Individual application of Humic acid caused a significant increase in mostvegetative growth characteristics ( main stem length , stem circumference ,Leaf area , dry weight vegetative system and root system . Soil application ofTrichoderma spp, Seaweed extract and humic acid single and dual caused asignificant increase in all of vegetative growth characteristics. VolkamerianaLemon rootstock showed a superiority over the rest rootstocks in growthcharacteristics .