EFFECT OF PLANT GROWTH PROMOTING RHIZOBACTERIA, ARBUSCULAR MYCORRHIZA AND DIFFERENT LEVEL OF CHEMICAL FERTILIZERS ON GROWTH AND YIELD OF SWEET CHERRY (Prunus avium)
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Date
2016
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Publisher
UHF,NAUNI,SOLAN
Abstract
ABSTRACT
The deterioration of soil health and environmental conditions due to indiscriminate use of
synthetic inputs in modern agriculture has promoted the use of beneficial microorganisms to increase crop
yields and maintain soil ecological balance. Therefore, the present investigations were carried out to
isolate and characterize the efficient indigenous PGPR and AM fungal isolates and to study their conjoint
effect along with chemical fertilizers on growth and yield of sweet cherry. A total of seven efficient
bacterial isolates were screened for multifarious PGP traits, out of which one bacterial isolate KHA8 was
selected, which solubilized 422.50 μg/ml of insoluble phosphorous, showed 72.41% siderophore
efficiency and inhibited selected fungi i.e. Rhizoctonia solani (30%), Fusarium oxysporum (53.24%) and
Pythium aphanidermatum (32.33%). On the basis of morphological, biochemical characterization, the
isolate was identified as Bacillus spp. The AMF spore population varied from 120.58 to 243.50 spores/50
g of soil and root colonization ranged from 58.20 to 80.50 per cent under natural conditions. The AM
fungal species isolated from different aspect/ altitude/ location followed the distribution pattern of
Glomus> Acaulospora> Gigaspora and Scutellospora with maximum (80%) frequency of occurrence for
Glomus genus in cherry plantation. Multiplication of AM fungal spores was carried out with Pannicum
maximum where root colonization was about 75% with spore count of 322.67 spores/50 g of soil after six
months of mass multiplication. The application of consortium (PS1 and PS7) and indigenous AMF
isolate (Glomus fasciculatum) at 90 per cent dose of NPK registered a significant increase in annual shoot
extension (185.23 cm), leaf area (372.27 cm2), available N (413.95), P (86.70) and K (472.50) kg/hac
over uninoculated control.
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