National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Water logging and low application efficiency are main problems inherent with surface irrigation. The methods were surface, surface drip and subsurface drip irrigation with three level of irrigation 100, 80, 60% of potential evapo-transpiration were compared and contour map of soil moisture patterns were analysed for corn in two times; one before irrigation, and other at 48 h after irrigation. The distribution of water in soil profile for potato crop by subsurface drip irrigation system (SDI) studied and it was observed uniform and more yield for all treatments. Therefore, the results can be concluded that under subsurface drip, the water available in root zone was enough for plant growth. The study indicated that soil moisture content under subsurface drip irrigation was more uniform as compared with surface drip. It was found that plant height, yield and water use efficiency of potato crop increased due to subsurface placement of laterals at 10 to 15 cm as compared to that under surface drip. The wetted depth was observed larger than surface wetting radius due to more water moves below soil due to gravity force as compared to capillary forces (elliptical shape at depth of 10 to 15 cm). In this paper, wastewaters reclaimed biological aerated filter (BAF) process were chosen as the experiment objects then the effects of the average growth and topography of biofilms attached to the irrigation laterals and quantitative relationship between biofilms components were studied. The results showed that emitter clogging degree and biofilms components revealed an increasing trend with the drip irrigation system running, which could be regarded as the ‘quick-slow-quick-slow’ increasing trend. During the initial 540 h of the system running, DWs, PLFAs, and EPS of attached biofilms had obvious negative linear correlation with emitter discharge ratio variation (Dra) and coefficient of uniformity (CU).
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