Examine the mechanisms by which rising temperatures affect livestock productivity in India. Suggest adaptive measures for smallholder dairy farmers.

Q. Examine the mechanisms by which rising temperatures affect livestock productivity in India. Suggest adaptive measures for smallholder dairy farmers. (15 marks, 250-350 words)

India is the world's largest milk producer, contributing about 24% of global output [3], with production at 247.87 million tonnes in 2024-25 [4]. Rising temperatures now threaten this base by acting through direct physiological and indirect resource pathways on animal productivity.

Direct physiological mechanisms - Thermoregulatory diversion: beyond a Temperature-Humidity Index of about 72, lactating animals redirect metabolic energy from milk synthesis to body cooling, causing severe yield losses [2]. - Depressed feed intake: reduced dry matter intake accounts for roughly 35% of the fall in milk output under heat stress [2]. - Species vulnerability: buffaloes — with dark skin and few sweat glands — are worst hit in Haryana's trans-Gangetic belt, while indigenous breeds like Sahiwal and Hariana show greater resilience [1]. - Reproductive impairment: lower conception rates and longer calving intervals shrink productive lactation days.

Indirect, resource-mediated mechanisms - Fodder and water scarcity from erratic monsoons and heat-damaged crops raises feed cost, the largest input in dairying [7]. - Disease burden rises as warming expands vector and pathogen range. - Post-harvest losses increase where smallholders lack cold chains.

Adaptive measures for smallholder dairy farmers - Low-cost shelter management: tree/thatch shade, sprinklers, misters and wallowing tanks in cross-ventilated sheds. - Heat-tolerant breeding: expand indigenous germplasm and artificial insemination coverage under the Rashtriya Gokul Mission, which benefits small and marginal farmers holding most indigenous animals [5]. - Feed security: night-time feeding, balanced rations with mineral mixture, silage and azolla; strengthen the fodder seed chain under the National Livestock Mission's fodder sub-mission [6]. - Climate advisories: THI-based heat alerts through KVKs and ICAR's NICRA climate-resilient village model [7]. - Risk transfer: livestock insurance and adaptation practices under the National Mission for Sustainable Agriculture [8].

Heat stress is thus a productivity problem transmitted through animal physiology, feed systems and disease alike. Aligning breeding, fodder and advisory schemes around heat resilience can convert India's dairy economy into a climate-adapted one, securing the nutrition and livelihoods that the White Revolution first delivered.

(~330 words)

Sources: 1. Analyzing the perceived sensitivity of Murrah buffalo-based livestock production system toward changing climate, Scientific Reports (2026) — buffalo vulnerability in Haryana's trans-Gangetic plain; resilience of indigenous breeds 2. An analysis of the effects of climate change on livestock, FAO — THI threshold of 72; energy diversion; feed-intake share of yield loss 3. India ranks first in milk production in the world contributing 24% of global milk production, PIB — India's global milk share 4. Release of Basic Animal Husbandry Statistics 2025, PIB/DAHD — milk production of 247.87 million tonnes in 2024-25 5. Rashtriya Gokul Mission, Department of Animal Husbandry & Dairying — indigenous breed development, AI coverage, small/marginal farmer base 6. National Livestock Mission, Department of Animal Husbandry & Dairying — fodder development sub-mission and livestock insurance 7. Impact of Climate Change on Farmers, PIB (ICAR–NICRA) — climate-resilient agriculture research and village-level advisories 8. National Mission for Sustainable Agriculture, Ministry of Agriculture & Farmers Welfare — NAPCC mission for climate-resilient agriculture