| In order to screen the suitable irrigation amount for strong gluten wheat in the eastern Hebei region in spring, two strong gluten wheat varieties(Zhongmai 886 and Zhongmai 998) were selected as materials, with five irrigation treatments during the jointing and anthesis stages: no irrigation(W0), 300 m3·hm-2(W1) each time, 450 m3·hm-2(W2) each time, 600 m3·hm-2(W3) each time, and 750 m3·hm-2(W4) each time, the effects of drip irrigation on the SPAD value of flag leaves, dry matter accumulation and transportation, grain filling rate, yield, and yield components of strong gluten wheat were studied. The results showed that with the increase of drip irrigation amount, the SPAD value of flag leaves after anthesis of strong gluten wheat and the duration of grain filling increased. The accumulation and transportation of dry matter and grain yield increased in the range of 0-600 m3·hm-2, but significantly decreased at 750 m3·hm-2, while water use efficiency decreased. Under W3 treatment, the two strong gluten wheat varieties showed the best performance in terms of spike number, grain number per spike, thousand grain weight, and yield. Taking into account both grain yield and water use efficiency, the optimal drip irrigation amount for strong gluten wheat during jointing and anthesis periods in the eastern Hebei region is 600 m3·hm-2 each time. |
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