| A field experiment were conducted using Xindong 33 cultivar, and three drip irrigation treatments of 2 550 m3·hm-2(W1), 3 150 m3·hm-2(W2) and 3 750 m3·hm-2(W3) after erecting stage to study the effects of different drip irrigation on water consumption characteristics and dry matter accumulation and distribution in winter wheat under full water supply before seeding and the irrigation of 750 m3·hm-2 before over winter stage.The results showed that along with the reduction of drip irrigation quantities, the water content in the 0~100 cm soil from booting to 20 days after flowering (20DAF) reduced greatly; but with the reduction of drip irrigation quantities, significant difference was observed among the same treatments on transverse relative soil moisture, and the total water consumption decreased, however, soil stored water consumption increased. With drip irrigation quantities decreased, reduction on leaf area index (LAI) and dry matter accumulation of the population were observed,obviously, especially where more far away from the soil capillary, but the dry matter translocation of vegetative organ before anthesis, its ratio and contribution to grains increased, while dry matter accumulation after anthesis and its contribution to grains were the opposite. Grain yield of W1 was lower than that of W2 and W3, the irrigation water use efficiency (IWUE) of W1 were significantly higher than those of W2 and W3, and the water use efficiency (WUE) of W2 was the highest, with 1.5 kg·m-3, and grain yield of 9 045.4 kg·hm-2. Therefore, 3 150~3 750 m3·hm-2 could be the suitable irrigation quota of drip irrigation for winter wheat. |
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