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以黑垆土、春小麦为试材,采用水、肥复因子设计进行盆栽试验和田间试验。结果表明,春小麦生育期(4~7月)供水量从150mm至400mm,产量呈直线上升。盆栽条件下肥料N的利用率从0.7%提高到26.6%;田间条件下由21.0%提高到31.7%。5月份是春小麦需水的关键时间,该月份降水50mm以上,每kgN可增产小麦8~12kg,每kgP2O5可增产7~10kg,降水利用率可达35.6%。施肥能显著提高水分生产效率。
With black mulberry soil and spring wheat as test materials, pot experiment and field experiment were conducted with water and fertilizer complex factor design. The results showed that the yield of spring wheat increased linearly from 150mm to 400mm during the growth period (April to July). The utilization of fertilizer N increased from 0.7% to 26.6% under potted condition and from 21.0% to 31.7% under field condition. May is the key time for spring wheat water demand. During this month, the precipitation is more than 50mm, yielding 8-12 kg of wheat per kg N, 7-10 kg / kg P2O5 and 35.6% precipitation. Fertilization can significantly improve water production efficiency.