RESPONSE OF YOUNG COFFEES (Coffea spp.) TO DIFFERENT LEVELS, SOURCES OF FERTILIZERS AND MICROBIAL INOCULANTS ON GROWTH AND DEVELOPMENT
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Date
2011-10-16
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University of Agricultural Sciences GKVK, Bangalore
Abstract
One of the major problems that confront the coffee planter is the difficulty in
establishing young coffee seedlings in the main field after transplanting due to the factors
like slow growth of seedlings, long dry spells after field transplanting (3-6 months), which
affect the establishment of young seedlings in the field. Under these circumstances, the
important consideration is to boost the growth and development of young coffee plants in
the main field through balanced nutrition. With this background, the present investigation on
“Response of young coffees (Coffea spp.) to different levels, sources of fertilizers and
microbial inoculants on growth and development” was undertaken at private plantation
adjacent to Central Coffee Research Institute, Balehonnur for period of two years (2008-
2010).
The experiment was laid out in Factorial Randomized Complete Block Design with
three replications and 12 treatments combinations involving three levels of fertilizers, two
phosphorus sources, with and without microbial inoculants.
Results revealed that, application of F3 level of fertilizer (20:20:20 and 40:60:40
NPK g plant-1 year-1 - Chandragiri and CXR, respectively) produced higher stem girth
(27.53 and 24.92 mm plant-1 - Chandragiri and CXR respectively), maximum bush spread
(101.85 for Chandragiri and 95.11 cm plant-1 for CXR ), more number of primary branches
per plant (13.63 in Chandragiri and 9.25 in CXR) compared F1 level of fertilizers (10:20:10
for Chandragiri and 20:60:20 NPK g plant-1 year-1 for CXR) and Control (F2 -20:10:20 for
Chandragiri and 40:30:40 NPK g plant-1 year-1 for CXR). Combined use of phosphorus 50
% Rock phosphate + 50 % Single super phosphate - P2 source) produced maximum root
volume than P1 source (control- 100 % Rock phosphate). Use of microbial inoculants
recorded higher nutrient uptake than uninoculated. Hence, from the present investigation, it
is concluded that combination of F3 level of fertilizer, P2 source of phosphorus, with
microbial inoculants resulted in producing vigorous and healthy seedling during pre bearing
stage for arabica Cv. Chandragiri and robusta Cv.CXR.
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