Shift in monsoon rainfall pattern in the North Eastern region of India post 1991

Saikia, U. S.; GOSWAMI, B.; RAJKHOWA, J.; VENKATESH, A.; Ramachandran, Kausalya; Rao, V. U. M.; Venkateswarlu, B.; NGACHAN, S. V.

doi:10.54386/jam.v15i2.1467

Cited by 5 publications

(1 citation statement)

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“…Since 80% of the crop area consists of rainfed agriculture in the region, apparent climate change and vulnerability potentially affect agriculture production by inimically reducing cropping intensity (131%) in regions with acute soil moisture deficits across hill slopes (Krishnappa et al, 2017;Hajong et al, 2022;Layek et al, 2022). The impacts of climate change are causes for concern in every province of the Eastern Himalayas with a greater degree of meteorological drying or lower rainfall experienced between 1991 and 2007 (Saikia et al, 2013), leading to multiple socio-economic consequences (Ravindranath et al, 2011). Moreover, acid soil stress is also one of the major crop production limitations (>80% geographical area) as it results in reduced phosphorus availability and substantial inadequacies in micronutrient supply with pronounced elemental toxicities (Manoj, 2011;Manoj et al, 2011).…”

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confidence: 99%

Year-round growth potential and moisture stress tolerance of buckwheat (Fagopyrum esculentum L.) under fragile hill ecosystems of the Eastern Himalayas (India)

Rangappa,

Rajkhowa,

Layek

et al. 2023

Front. Sustain. Food Syst.

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IntroductionUnder a changing climate, the fragile ecosystems of the Eastern Himalayas (EH) are persistently challenged by prolonged dry spells and erratic rainfall. Identification of suitable high-yielding crops with higher moisture stress tolerance and adaptability is paramount for the region. Although the region received a good amount of rainfall in the rainy season, the winter months, viz., November to March, rarely received any rain. Even within the rainy season, there are several intermittent drought spells that hinder crop productivity.MethodsThe present study has used field and microcosm experiments to assess the year-round cultivation potential and extent of moisture stress tolerance in the lesser-known buckwheat crop of the region.Results and discussionSowing of buckwheat from mid-September to mid-December produced better grain yield, the highest being when sowing in October (9.83 q ha−1) and the crop was found suitable to grow all through the year for higher green biomass (12.6–38.4 q ha−1). The moisture stress tolerance of buckwheat was significantly enhanced by increased total root length and root surface area by 12.4 and 34.7%, respectively. Increased photo-protective carotenoids, chlorophyll b, and favorable stomatal attributes with substantial epicuticular wax have significantly improved the moisture stress tolerance of Buckwheat. In addition, leaf proline was found 25.4% higher and total soluble protein, reducing sugar, and cell membrane stability were found 29.2, 38.1, and 36.5% lower compared to the control, respectively. A significantly lower rate of water loss (25.6%) with its stomatal and non-stomatal adaptations and versatile pollen structural traits under moisture stress over control, make the buckwheat crop potentially more stress tolerant and economical crop for EH of India.

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Section: Introductionmentioning

confidence: 99%

Year-round growth potential and moisture stress tolerance of buckwheat (Fagopyrum esculentum L.) under fragile hill ecosystems of the Eastern Himalayas (India)

Rangappa,

Rajkhowa,

Layek

et al. 2023

Front. Sustain. Food Syst.

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Review and synthesis of climate change studies in the Himalayan region

Negi

Tiwari

Singh

et al. 2021

Environ Dev Sustain

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There are a few regions in the world, where climate change impacts are more intense than other regions of the world, and Himalaya is the case. The Himalaya, one of the biodiversity hotspot regions and provider of ecosystem services to billion of people all across the world. Present study reviewed and synthesized climate change studies in the Himalayan region in general and Indian Himalayan region (IHR) in particular. Analysis of the literature indicates exponentially increase in climate change studies 2005 onward in the IHR, and maximum are from Jammu and Kashmir (105) followed by Uttarakhand (100) and Himachal Pradesh (77). Among the subject types, maximum climate change impact was studied on water resources/glacier retreat (141 studies) followed by agriculture (113) and forests/biodiversity (86). Increasing temperature, frequent drought spells, erratic rainfall and declining snowfall are commonly reported indicators of climate change. For instance, temperature is reported to increase by 1.5 °C in the Himalaya than an average increase of 0.74 °C globally in last century; however, it varied in eastern (0.1 °C per decade and western Himalayas (0.09 °C per decade. An increase in temperature between 0.28 and 0.80 °C per decade was reported for North-western Himalaya and 0.20-1.00 °C per decade for Eastern Himalaya. The higher altitude of Himalayan and Trans-Himalayan zone are reported to be warming at higher rates. Many of the glaciers were reported to be retreating in both eastern and western Himalaya. Heavy rainfall is becoming very common in the region often accompanied by cloudbursts that aggravate flood situation many times. Perception-based studies of the region reported to provide firsthand and detailed descriptions of climate change indicators and impacts from rural and remote areas, where no instrumental data are available.

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Effect of Rainfall Variability on Rice Yield in North Eastern Hills of India: A Case Study

et al. 2017

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Shift in monsoon rainfall pattern in the North Eastern region of India post 1991

Cited by 5 publications

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Year-round growth potential and moisture stress tolerance of buckwheat (Fagopyrum esculentum L.) under fragile hill ecosystems of the Eastern Himalayas (India)

Year-round growth potential and moisture stress tolerance of buckwheat (Fagopyrum esculentum L.) under fragile hill ecosystems of the Eastern Himalayas (India)

Review and synthesis of climate change studies in the Himalayan region

Effect of Rainfall Variability on Rice Yield in North Eastern Hills of India: A Case Study

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