Effect of biochar, carpet waste, FYM and PGPR on soil biological properties under organically grown rice (Oryza sativa L.)

摘要

A field experiment was conducted at Agricultural Research farm, BHU, on sandy clay loam soil with rice (var. HUR-105) to find out the influence of biochar, carpet waste, FYM and PGPR on biological properties of alluvial soils of Varanasi. The enzyme dehydrogenase activity ranged from 95.9 to 231.6 fig TPF produced g~(-1) soil day~(-1) whereas the enzyme alkaline phosphatase activity ranged from 49.1 to 108.7 jug PNP produced g 7 soil hr~(-1). The activity of both the enzyme was highest at 80 days after transplanting (DAT) of rice in treatment receiving biochar + carpet waste + FYM + PGPR. The microbial population of bacteria, actinomycetes and fungi were ranged 23-48 x 105, 26-12 x 104 and 10.3-20 x 103 cfu g~(-1) of soil respectively. The microbialpopulation was highest at 80 DA T of rice than 40 and 120 DA T of rice crop. The maximum microbial population was found in T_(10) which receive biochar + carpet waste + FYM + PGPR at all the growth events. The biological properties of soil were positively and significantly correlated with organic carbon content of soil.