RESUMEN
Tropospheric ozone (O3) is a pervasive greenhouse gas and air pollutant known for its detrimental effects on human health and vegetation. In the recent years, tropospheric ozone has been rising steadily on the account of rapid urbanization and globalization. Hence, a study to investigate the impact of elevated ozone levels on cabbage cultivars have been initiated. The cultivars Tekila and Primero, which are extensively grown in the high-altitude region of the Western Ghats, India were used as test crop, where ozone levels are a growing concern. The study employed a comprehensive experimental design, encompassing ozone stress (200 ppb), cabbage varieties (Tekila and Primero), and different growth stages of the cabbage plants. Ozone fumigation at 200 ppb was used to simulate elevated ozone conditions, reflecting potential future scenarios. To assess the extent of impact both physiological and biochemical parameters were extensively analyzed. The results revealed that elevated ozone concentrations had a significant negative impact on both cabbage cultivars. Photosynthetic rate, stomatal conductance, and chlorophyll content declined progressively as ozone exposure continued, leading to maximum reductions of 71.2, 81.03 and 32.98% respectively. However, protective mechanisms were activated in response to ozone stress, including increased proline by 32.24%, ascorbic acid by 64.75%, catalase by 3.58%, and peroxidase activities by 56%, suggesting the cabbage plants' efforts to mitigate oxidative damage. Overall, this study highlights the vulnerability of cabbage cultivars to elevated ozone levels and emphasizes the need for effective mitigation strategies to safeguard crop productivity and ensure sustainable agriculture in regions facing escalating ozone pollution. Further research is essential to develop and implement solutions that can protect vital crops like cabbage from the adverse effects of tropospheric ozone.
RESUMEN
Accurate estimation of crop yield is crucial for ensuring food security and effective policy making. This study focuses on the estimation of sorghum yield in the Solapur region of Maharashtra (India), employing the Decision Support System for Agrotechnology Transfer (DSSAT) model. Sorghum is the fifth largely produced staple crop of the world which also plays a vital role in the food security produced by India. Maharashtra has the largest area under sorghum crop, and Solapur has the most area under rabi sorghum with an area of 4.6 lakh ha, accounting for 23% of the total area under rabi sorghum in the state. Although productivity is lower in Maharashtra than in other states, these studies will help us to get a preharvest estimate of the crop. Crop Cutting Experiments(CCE) were conducted for rabi sorghum and the model was validated for the simulated yields; which have a range of grain yield from 611 to 1525 kgs ha-1 and showed error with less than 14% and it was evaluated with statistical models such R2, Nash-Sutcliffe efficiency (NSE) and Normalized Root Mean Square Error (NRMSE) and results show as 84%, 0.84 and 0.07. This model can be used further used for the yield gap analysis, and climate change studies for the locations.
RESUMEN
Burning the paddy straw had variety of effects both on and off the farm. It entails nutrient and economic productivity loss in addition to impact on air quality, animal and human health. Soil incorporation is a cost-effective method of disposing the paddy straw. Effects of enhanced paddy straw incorporation in the field to investigate the growth and yield parameters during the summer season at TNAU, Coimbatore. The treatments comprise Continuous flooding (Conventional) (M1), AWDI (field water tube): Irrigation at soil moisture depletion by 10 cm (M2), AWDI (field water tube): Irrigation at soil moisture depletion by 15 cm (M3) as main plots. The subplot treatments consist of Rice raw straw incorporation + 75% RDF (S1), Rice raw straw incorporation with Pusa Decomposer Capsules + 75% RDF (S2), Rice raw straw incorporation with TNAU Bio mineralizer + 75% RDF (S3), Rice raw straw incorporation with Pusa Decomposer Capsules + TNAU Bio mineralizer + 75% RDF (S4), 75% RDF (S5), 100% RDF (S6). Incorporation of rice straw, Pusa decomposer, TNAU Bio-mineralizer along with 75% RDF recorded better results in all growth stages and yield.
RESUMEN
The study was performed to assess the impact of climate change on spatiotemporal changes in rainfed maize yield. Climate projections data of MIROC-ESM-CHEM model from CMIP6 was used for future climatic scenarios in the maize growing areas of Dindigul and Perambalur districts of Tamil Nadu. The DSSAT model was used to simulate maize yield and evaluate adaptation strategies for base period (1991-2020), the mid (2040-2069) and end centuries (2070-2099) under SSP245 and SSP585 scenarios. The simulation finding shows that, in all scenarios maize yield declined in both Dindigul (7 to 9% and 11 to 12%) and Perambalur (6 to 9% and 11 to 13%) during mid and end centuries respectively from the base period (1991-2020). Following the adaptation strategies such as delayed sowing, the yield was increased in both Dindigul (5 to 6% and 4 to 5%) and Perambalur (4 to 5% and 5 to 6%) with respect to normal sowing date. The results of this study would help in developing adaptation strategies for minimizing the adverse effects of the projected climate in maize-growing districts of Tamil Nadu.
RESUMEN
Climate change is one of the most severe global environmental issues. Carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and fluorinated gases (F) are the principal greenhouse gases (GHGs) whose atmospheric concentrations are escalating. According to [1], agricultural soils have the ability to mitigate GHG emissions by 89% through the sequestration of carbon and an additional 2% and 9% through the mitigation of N2O and CH4, respectively. The process of capturing and long-term stabilisation of CO2 in the soil is known as soil carbon sequestration. Increased food production, better soil health, diversified ecosystem services, and reduced environmental footprints are all the benefits of practices increasing soil organic carbon (SOC). These techniques include planting woods, managing nutrients by using compost, sludge and green manure, and mulching [2]. Additionally, they have the ability to reduce GHG emissions by up to 8% by mitigating around 18 Mg C ha-1 C year -1 (0-15 cm soil layer). Farmers and society as a whole may benefit from this approach [3]. Supporting campaigns and initiatives to boost soil C sequestration is crucial, both on a policy level and through programmes. Additional studies needs to be done to determine the benefits of C sequestration on soil quality precisely, which encourages farmers to adopt more C-positive agricultural practices that improve productivity, as well as water and air quality [4].
RESUMEN
Drought is a natural disaster that tremendously affect the agriculture production and livelihood. Though the Tamil Nadu state is located at peninsular region of India and contributed from both the monsoons, the frequency of drought is high due to vagaries of monsoonal pattern. A study was conducted at Tamil Nadu Agricultural University to assess the drought characteristics across the north western Agro Climatic Zone (ACZ) of Tamil Nadu using Standardized Precipitation Index (SPI) during the past 30 years (1991-2020). The study clearly indicated that the Salem district had high vulnerability to drought followed by Dharmapuri and Namakkal districts during the South West Monsoon (SWM), whereas the Namakkal had high vulnerability followed by Salem and Dharmapuri during North East Monsoon (NEM).