EFFECT OF TREATED SEWAGE WATER ON MULBERRY PRODUCTION AND ITS IMPACT ON COCOON QUALITY
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Date
2020-12-04
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University of Agricultural Sciences, Bangalore
Abstract
The research entitled “Effect of treated sewage water on mulberry production and its impact on cocoon quality” was conducted at Department of Sericulture, UAS, Bangalore during Rabi 2019. There were six treatment combinations comprising of raw sewage water, treated sewage water and borewell water replicated four times and laid out in randomized complete block design. Results of the research revealed that soil nutrients, mulberry growth, leaf yield, leaf quality parameters and silkworm growth and cocoon parameters were found significantly influenced by raw and treated sewage water irrigation. Among different treatment combinations 100% raw sewage water irrigation recorded higher growth, leaf yield (54319 kg ha-1 year-1) and quality parameters such as leaf NPK (3.68% N, 0.40% P and 1.91% K) and micronutrients (30.08 ppm of Zn, 103.75 ppm of Mn and 373.75 ppm of Fe) compared to 100% treated sewage water and borewell water irrigation. Silkworms fed with mulberry leaves from the plot irrigated with 100% raw sewage water showed significantly higher larval weight (32.02 g/10 larvae), single cocoon weight (1.706 g), single shell weight (0.321 g) and cocoon shell ratio (18.65 %) whereas, higher Effective Rate of Rearing (99%) was noticed in 100% treated sewage water irrigation. Similarly, soil EC, OC, N, P, K, Fe, Mn, Zn were significantly higher in 100% raw sewage water irrigated
plot. An overview of the study revealed that raw sewage water irrigated plot significantly improved the soil fertility status and growth of mulberry as well as silkworm growth and cocoon parameters.