Effect of Different Methods and Levels of Irrigation and Mulching on Yield and Water Productivity of Mulberry in Eastern Dry Zone of Karnataka

摘要

Improved irrigation water saving methods, technologies are valuable for sustainable production strategies for mulberry and cocoon production in dry regions. Efficient methods, levels of irrigation and mulching can contribute immensly towards improvingmulberry yield and water productivity. Therefore, a field experiment was conducted during rabi 2013 and summer 2014 at College of Sericulture, Chintamani, Chickballapur district, Karnataka to know the response of mulberry to methods, levels of irrigation and mulching. The results indicated that leaf yield and waterproductivity of mulberry were significantly influenced by different methods and levels of irrigation and mulching. Among different methods and levels of irrigation and mulching treatments, subsurface drip irrigation (41280 kg ha"1 yr1), with mulching (38035 kg ha"' yr1) and irrigation level at 1.0 CPE (41818 kg ha"' yr')were recorded highest mulberry leaf yield than surface drip (35263 kg ha"' yr-1) and micro spray jet (35567 kg hayr1) irrigation methods, without mulching (36705 kg ha 1 yr') and irrigation at 0.8 CPE (37988 kg ha 1 yr'). Further, subsurface drip irrigation recorded maximum water productivity and minimum water used to produce one kg of leaf and to earn one rupee of profit (356.29 kg hacm1, 289 lit and 115 lit) than the surface drip (307.46 kg hacnr', 339 lit and 136 lit) and micro spray jet (308.65 kg hacm1, 336 lit and 134 lit) irrigation methods, respectively. Mulberry leaf yield increased and waterproductivity decreasedwith increased levels of irrigation. However, these results showed that, irrigation of mulberry with subsurface drip irrigation increased leaf yield and water productivity by saving 20 per cent of irrigation water than surface drip and micro spray jet irrigation methods under dry regions of Eastern Dry Zone (EDZ) of Karnataka.