Heat and Drought Stress in Potatoes Xi Liang Aberdeen Research & Extension Center, Aberdeen, ID 83210.

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Presentation transcript:

Heat and Drought Stress in Potatoes Xi Liang Aberdeen Research & Extension Center, Aberdeen, ID 83210

Water transportation in plants Cooling the crop canopy

How does heat and drought stress feel?

Potato Canopy Development LAI = leaf area / ground area Potato and cereal can reach similar LAI. dule= &topicorder=6&maxto=73&minto=1 PotatoCereal

Potato Root Growth Differing wheat root systems produced by alternative cultivation methods, and the estimated effects of varying root system characters on water capture. See King et al., pp 383– –390 Fine roots Rooting depth

Heat and Drought Stress Physiology books/responses-of- organisms-to-water- stress/water-stress-and- agriculture

Heat and Drought Stress in Potatoes Hasten leaf senescence, and thus crop senescence Reduce leaf size and total leaf area. crinkle-on-russets.png

Heat and Drought Stress in Potatoes a%29%20-%20Potato-HollowHeart4.jpg nutrition/crops/potato/quality/reducing-potato-internal- spotting/ documents/pi- 009/eng/ / ?chap=9 Irrigation scheduling Fertilization management

Cultivar Selection

Summary Water transportation in plants Physiology and symptoms of heat and drought stress in potatoes Management practices: Irrigation management Fertilization: calcium Cultivar selection