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为给滴灌春小麦氮素科学管理提供参考，在大田条件下，以新春6号和新春35号为供试材料，研究施氮量 (0、75、150、225、300、375 kg·hm^-2）对滴灌春小麦干物质积累、分配和转运的影响。结果表明，在一定范围内，施氮可促进滴灌春小麦干物质积累和转运，新春6号和新春35号分别以施氮225和300 kg·hm^-2的效果最佳。新春35号最大干物质积累速率、最大积累量和生育期均大于新春6号。两品种的籽粒产量均随着施氮量的增加呈先增后降的趋势，新春6号和新春35最高产量的施氮量分别为288和335 kg·hm^-2。新春6号千粒重大于新春35号，而穗粒数小于新春35号。因此，滴灌春小麦应根据品种对氮素的需求特点，合理施氮。

英文摘要:

The objective of this experiment was to study the effect of nitrogen application on the accumulation, distribution, and transfer of dry matter of wheat under drip irrigation. The field experiment consisted of six nitrogen fertilizer treatments (N₀: 0 kg·hm^-2, N1: 75 kg·hm^-2, N₂: 150 kg·hm^-2, N₃: 225 kg·hm^-2, N₄: 300 kg·hm^-2, and N₅: 375 kg·hm^-2) and two wheat cultivars (Xinchun 6 and Xinchun 35). The results showed that within a certain range, nitrogen application increased the accumulation and transfer of dry matter to grain. The maximum dry matter accumulation rate, the maximum dry matter accumulation, the length of the growing period and the demand for nitrogen of Xinchun 35 were greater than that of Xinchun 6. Grain yield of both cultivars initially increased and then decreased as the applied amount of nitrogen increased. The yield of Xinchun 6 and Xinchun 35 was the maximum when the nitrogen application rate was 288 kg·hm^-2 and 335 kg·hm^-2, respectively. The thousand grain weight of Xinchun 6 was greater than that of Xinchun 35, while the number of grains per spike of Xinchun 6 was less than that of Xinchun 35. In conclusion, different varieties of spring wheat needs different amount of nitrogen, the growth characteristics of different cultivars should be taken into account when making fertilizer recommendations for drip irrigated spring wheat.

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