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The conditions of hardening and frost resistance in winter cruciferous crops


, : The conditions of hardening and frost resistance in winter cruciferous crops. Fiziologiya Rastenii 21(4): 833-836

In trials with winter rape and winter and spring mustard, the optimum temperature conditions for hardening to increase frost resistance were 5-10 days at +50 deg C during the 1st phase of hardening and 3-5 days at -3 deg during the 2nd phase. The most suitable stage of plant development for hardening was that of 2-4 true leaves. The maximum survival of hardened plants under -15 deg was 82.7% for winter rape, 63.6% for winter mustard and 14.2% for spring mustard.

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