Actual impacts of global warming on winter wheat yield in Eastern Himalayas

摘要: Himalayas, are among the areas most vulnerable to global warming, however, little is knownabout warming impacts on crops. Therefore, actual affects of anticipated onwinter wheat were tested in Tibet, China. During period 1988-2012, Tibet region hasexperienced a large increase daily mean, minimum and maximum temperatures during wheatgrowing seasons by 0.50, 0.67 0.51 oC every ten years, respectively. The de-trended wheatyield increased 34.4 kg ha-1 year-1 this period. According historical data, 1 oCincrease mean temperature could get 370.6 ha−1 gain yield. Similar gains inwheat yield found field experiment with an 1.1 meantemperature. caused significant reduction pre-anthesis phase andentire growth 14 13 days, green leaf spike number inthe warmed plots significantly higher than that non-warmed plots, while grainnumber per was lower former later (P<0.05). mainmechanism underlying positive moderate throughimproving plant development mitigating lowtemperature limitation. This study suggests further efforts should be directed towards theimprovement agriculture infrastructure utilize climatic oncrop production.