MADRAS AGRICULTURAL JOURNAL

Trend Analysis of Rainfall Intensity in Tiruchirappalli District of Tamil Nadu

Abstract

                                Rainfall is the dynamic weather parameter having a significant role in the agriculture livelihood. Growth in agriculture and other related sectors depends mainly on the adequate amount and timely availability of rainfall. Variability in precipitation exerts a huge impact on human beings and agriculture. This variation gives the necessity to study the regular pattern of rainfall. The present study aims at analysing the trends in rainfall intensity across various blocks of Tiruchirappalli district using daily rainfall data for the period 1990 to 2017. Non-parametric tests such as Mann- Kendall test and Sen’s slope estimator were employed for this purpose. Results revealed that two blocks showed statistically significant increasing trends (95% confidence level) and one block showed significant decreasing trend (95% confidence level) and the remaining eleven blocks showed no significant trends.

Key words : Rainfall, Trend, Mann-Kendall, Sen’s slope.

Copyright @ 2019 Madras Agricultural Journal | Developed by Crystalpro All right reserved.

Key words : Growth parameters, Machine transplanted rice, Weed management, Yield.

Copyright @ 2019 Madras Agricultural Journal | Developed by Crystalpro All right reserved.

to increase the postharvest life. AIB is an ethylene biosynthesis inhibitor which inhibits the ethylene synthesis by inhibiting ACC oxidase enzyme. Banana fruits were treated with different AIB concentrations (50, 100, 150, 200 ppm along with control) and spraying methods (Dipping and Spraying). AIB @ 150 ppm dipped for 5 minutes showed decreased finger dislodge from the hands (50-70 per cent at 11th day after treatment) compared to control fruits (100 per cent at 9th day after treatment). On comparing AIB with ethylene inhibitor (1-MCP) and chemicals (Hexanal and calcium chloride) under cold and ambient storage condition, AIB showed better result with reduced finger drop. At 11th day of cold storage AIB treated fruits exhibited minimum finger drop of 50 per cent followed by 1-MCP vaporization with finger drop percentage of 60 and control fruits reported the maximum number of finger drop (90 per cent). Under ambient condition at 7th day itself the AIB treated fruits showed 60 per cent finger drop. Hence from the present study, the external temperature would alter the storage life of the fruits which may be an important factor and noted for further improvement of postharvest life of fruits by storing under required temperatures and minimizing the postharvest losses.

Key words : : Weak neck, α- Amino isobutyric acid, Storage condition.

Copyright @ 2019 Madras Agricultural Journal | Developed by Crystalpro All right reserved.

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  • Copyright @ 2019 Madras Agricultural Journal | Developed by Crystalpro All right reserved.