International Journal of Chemical Studies
Vol. 5, Issue 6 (2017)
Management strategies for apple replant problem in India
Author(s): Niranjan Singh, DP Sharma and Adikshita
Abstract: Replant problem is the situation resulting in suppression of growth and poor productivity of the replanted trees on old orchard sites which makes the plantation uneconomical. Commercial apple orchards planted in late sixties in Himanchal Pradesh, India have shown symptoms of declining productivity as these plants have completed their economic life span. There has been substantial increase in the proportion of declining orchards year after year which need to be addressed by developing suitable agro-techniques to combat replant problem for better field survival rate and sustainable productivity in the state. The effect of clonal rootstocks, soil management treatments and their consortium on growth and phenology of replanted apple orchards were studied. In present study there were 20 treatments comprising of four apple rootstocks i.e. Seedling, M.793, MM.111 and M.7 and five different treatments i.e. control, soil fumigation, PGPR, biocontrol and combined (Soil fumigation + PGPR + Biocontrol) with three replications. The pooled data over the years 2015 and 2016 reveled that M.793 rootstock had significantly maximum plant growth and vigour parameters, soil enzymatic activities and microbial counts. Among the treatments, highest growth and vigour parameters, soil enzymatic activities and microbial counts were recorded maximum in combined treatment. The interaction between rootstocks and treatments revealed that combinations of M.793 × combined treatment recorded maximum growth and vigour traits, bacterial counts, fungal counts and actinomycetes counts compared to other rootstocks and treatment combinations under replant situations, which can be exploited for the management of replant problem in apple.
Pages: 2171-2176 | 436 Views 19 Downloads
How to cite this article:
Niranjan Singh, DP Sharma, Adikshita. Management strategies for apple replant problem in India. Int J Chem Stud 2017;5(6):2171-2176.