[Increase methods of potato adaptive potential in the Medium Coastal Amur Area [Treatments of tubers by humic preparations for rise of fungal disease resistance]]
2008
Aseeva, T.A. | Zolotareva, E.V. | Logachiev, V.V., Far East Research and Development Inst. of Agriculture, Khabarovsk Territory (Russian Federation)
Field experiments were done during 4 years in the Khabarovsk Territory. The potato varieties Nevskij and Evgiria were grown at a rotation on meadow-brown and soddy-brown heavy soils. Preplanting treatments of tubers was done by 3 humic preparations (HP). The chemical protectant Benlat served as an etalon. Treatment by HP accelerated a start of the main phenophases by 2-7 days in compare with the control variant and by 1-3 days in compare with the etalon. Leaf area increased by 10-25%, chlorophyll content in did by 11-33% and dry matter content did in 1.5 times. A number of plants infected by bare patch decreased in 2-3 times. Resistance to black spot and late blight was the same as at treatment by a fungicide. Potato yield raised by 4 200-5 400 kg/ha (the control one was 21 000 kg/ha) due to treatment by HP. Tuber marketability increased by 7.7-10.0%. HP were also added into a fungicide solution at potato top treatment. It allowed to decrease a pesticide application rate in 2 times without changing its efficiency. Yield additions to the control meanings (22 100 kg/ha) were 5000-9400 kg/ha in the case of HP using for preplanting tuber treatment and plant top treatment; tuber marketability increased by 12-17%. The conclusion has been done that HP treatment is prospect for growing potatoes in the conditions of the Middle Amur Coastal region because it is profitable and safe for environment.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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