Zinc (Zn) is a mineral that is required for normal plant and human metabolism; nevertheless, Zn deficiency in soil poses a significant threat to long-term agricultural productivity. In this investigation, the impacts of zinc solubilizing bacteria (ZSB) on Zn release, rice plant growth, and yield parameters in the Zn-deficient submerged soil were evaluated. The Zn solubilization capacity of five different bacterial isolates was tested, followed by an incubation study that was conducted for 9 weeks under the submerged condition in the Zn-deficient calcareous sandy clay loam soil. A field experiment was conducted in Zn-deficient soil with randomized block design and replicated thrice to find out the impact of two Zn sources, viz., zinc carbonate (ZnCO 3 ) and zinc sulfate (ZnSO 4 ) with the efficient ZSB on rice growth and Zn accumulation in the rice grains. Out of five tested bacterial isolates, Bacillus aryabhattai KSB N 2 K 7 released the significantly higher amount of Zn in the liquid medium amended with insoluble Zn sources, such as zinc oxide (ZnO) and zinc carbonate (ZnCO 3 ) of 185.7 mg L -1 and 185.4 mg L -1 , respectively. The incubation study revealed that the application of ZnSO 4 (25 kg ha -1 ) with B. aryabhattai KSB N 2 K 7 showed a significantly higher range of Zn release (3.81 to 5.12 mg kg -1 ) during 9 weeks of incubation as compared with that of ZnCO 3 (11 kg ha -1 ) with B. aryabhattai KSB N 2 K 7 (3.52 to 4.48 mg kg -1 ). The application of Zn sources with B. aryabhattai KSB N 2 K 7 resulted in a significant increase in plant biometrics. The application of 25 kg ZnSO 4 per hectare with B. aryabhattai KSB N 2 K 7 resulted in the significantly higher grain yield of 5806 kg ha -1 than that of treatment containing recommended dose of fertilizers alone. The application of 25 kg ZnSO 4 per hectare with B. aryabhattai KSB N 2 K 7 registered significantly higher Zn accumulation in grain compared to all other treatments. Thus, the results demonstrated the crucial role of Bacillus aryabhattai KSB N 2 K 7 in Zn release and rice fortification in the Zn-deficient submerged soil.
Maize is a high nutrient demanding and zinc responsive crop. A Field study was conducted at farmer's field, Pavali village of Viruthunagar district during 2019-2020 to evaluate the effect of chelated zinc fertilizer on growth parameters of maize (Zea mays L.). The experiment was laid out as randomized block design with five replication. The results showed that plant height (192.5 cm), leaf length (80.4 cm), leaf breadth (9.82 cm), no. of leaves (13.2) and leaf area index (5.28) responded positively towards soil and foliar application of chelated Zn Formulation @ 7.5 kg ha -1 with 0.5% as foliar spray at 30 & 45 DAS (T8) than absolute control.
The irrigation water quality is gaining importance day by day due to the changes in the urbanisation and industrialisation which over utilise the under ground water. The ground water samples were collected from 15 revenue villages of Melur block, Madurai, Tamil Nadu during March, 2017 at variegated intervals, processed and analysed for the physico-chemical, anionic and cationic parameters to find out their quality by arriving calculated parameters viz., RSC (Residual Sodium Carbonate) and SAR (Sodium Absorption Ratio). Though the overall values lies well within the safe limit of water quality, the 25 percent water samples found to be alkaline, 42 percent found to slightly saline & two percent found to be critical in salinity levels. The highest value of 9.23, 2.62 dSm -1 , 3.52 and 8.51 of pH, EC, RSC and SAR were observed in the irrigation water samples. The good quality of 92.8 per cent, marginally saline 2.9 per cent and marginally alkali of 4.3 per cent of irrigation water samples have been recorded as per AICRP, 1989 classification.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.