Influence of organic manures and biofertilizers on the growth, yield and productivity of guava (Psidium guajava L.) cv. Allabad Safeda.
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Date
2018
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Punjab Agricultural University, Ludhiana
Abstract
The present investigations entitled “Influence of organic manures and biofertilizers on the
growth, yield and productivity of guava cv. Allahabad Safeda.” were conducted in the
experimental orchard of Department of Fruit Science, Punjab Agricultural University,
Ludhiana, during the year 2017-18. The study was laid out by randomized block design with
3 replications and 9 treatments. In the present investigation the guava trees were treated with
different treatment combination of vermicompost, FYM and biofertilizers (Azotobacter,
Azospirillum and PSB). Significantly higher fungal population (36 × 10³ CFU/g of soil),
Azospirillium population (52 × 104 CFU/g of soil), PSB population (49 × 104 CFU/g of soil)
and Soil dehydrogenase activity (4.20 µg TPF /g of soil/hr) was observed in the treatment
having Vermicompost + Azospirillum @250 g/tree + PSB @250 g/tree (T4) 60 days after the
application of biofertilizers. The combination of Vermicompost (30 kg/ Plant) + Azospirillum
@250 g/tree + PSB @250 g/tree (T4) improved physico-chemical and biological properties of
soil (available soil and leaf nutrients, counts of microbes) and found to be most effective to
produce better fruit quality and tree characteristics i.e. fruit weight, fruit size, TSS, total
sugars, ascorbic acid and tree height, spread, stem girth days from flowering to fruit harvest.
Also the yield was statistically at par with that recorded in T9 (control; recommended dose of
inorganic fertilizers).
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