To enhance the yield of weak winter wheat varieties in winter wheat regions, in this study, a high-yield winter wheat variety with a short vernalization requirement and relatively weak frost resistance, Jimai 22, was use as material. A black fully biodegradable water-permeable mulch film combined with hole-sown late sowing technology was employed to ensure seed germination without seedling emergence before winter, followed by early spring seedling emergence to mitigate cold stress. Six treatments were established: no irrigation with mulch(T1), single irrigation with mulch(T2), double irrigation with mulch(T3), no irrigation without mulch(CK1), single irrigation without mulch(CK2), and double irrigation without mulch(CK3). Field trials conducted in the winter wheat region of Songcun, Qinxian, demonstrated that the T1 treatment had the emergence number of 12.07 plants/hole, achieving the seedling emergence rate of 92.82%, significantly higher than that of the control. At seedling stage, seedling stability was significantly higher than that of the control. During drought periods, T1 exhibited reduced spikelet formation, with 3.448 5 million spikes per hectare, while T2 and T3 treatments achieved significantly higher spikelet numbers(3.479 3 million and 3.718 5 million spikes per hectare, respectively) than that of CK1, CK2, and CK3. Yield analysis revealed that yield of T1, T2, and T3 treatments was significantly higher than that of CK1, CK2, and CK3. In conclusion, introdunction of the weak winter wheat variety of Jimai 22 through the technology integrating late sowing with mulch film and irrigation in winter wheat regions could not only effectively enhance the cold and drought resistence of wheat, but significantly improve wheat yield.
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