The present paper was intended to calculate water quality index (WQI) of river Bhagirathi. It is one of the tributary of holy river Ganga of India. In order to determine the quality of its water for public use, recreation and other purposes , the eleven parameters like pH, electric conductivity, Total dissolve solids, Total suspended solids, Dissolve oxygen , Biological oxygen demand, Total alkalinity, Total hardness, Chloride, Nitrate and Sulphate were determine. The water quality index calculated from the observed parameters indicate the river Bhagirathi at Uttarakhand during winter was under good water quality condition, while at summer and rainy season of showed poor water quality index. In terms of index number ,offers a useful representation of overall quality of water for public or for any intended use as well as in the pollution mitigate plan and in water quality management.
Split application makes potassium available at peak crop requirement period whereas basal application appeared to accommodate maximum demand at initial growth stages resulting into fixation and other losses. To assess the most suitable and economic ways of potassium application on growth and yield of transplanted paddy in north-eastern plains of India, an experimented was conducted during 2017-18, to evaluate the performance of different levels of potassium applied at different times. The experiment was laid out in split plot design with 3 replications consisting of three levels of potassium application i.e. K1-100% RDK (40kg), K2-150% RDK (60kg) and K3-200% RDK (80kg) at four different times i.e. S1 (basal), S2 (50% basal + 50% at max. tillering), S3 (50% basal + 25% at max. tillering + 25% at PI) and S4 (75% as basal + 1% spray at maximum tillering and PI). The results revealed that with increase in the level of potassium, significant positive effects on all the growth parameters and yield attributes were observed whereas potassium application with S3 showed better crop performance. Increased level of potassium (200% RDK) recorded significantly higher grain yield (4999 kg ha -1 ) and straw yield (8488 kg ha -1 ). Thus, levels of potassium in paddy may safely be increased up to 200% for maximizing yield potential as well as net profit and it should be applied in split doses with 50% of it as basal, 25% at max. tillering and rest 25% at panicle initiation.
Limnological parameter and plankton diversity are an important criterion for determining the suitability of water for irrigation and drinking purpose. River Bhagirathi has greatest importance for humankind. The specific status of Physio-chemical parameter and diversity of plankton in River Bhagirathi have been studied through monthly surveys in two annual cycles (2010-11 and 2011-12) and annual survey of fishes in two annual cycles (2010-11 and 2011-12). The water remained moderately alkaline (pH 7.7) while velocity (1.23m/s), TS (844mg/l), chloride (5.04mg/l), hardness (96.73mg/l) and alkalinity (67.11mg/l) showed low mean values. Average dissolved oxygen levels were at 8.54mg/l while average nitrate and phosphate levels were 0.048mg/l and 0.072 mg/l respectively.
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