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在陇南北部半干旱区清水试验站,在有限补灌条件下,对冬小麦产量及水分效应进行了研究,以期得到补灌时期的最佳结合点。结果表明:在补灌条件下,采用地面滴灌技术对冬小麦进行补灌的最佳时期是在“拔节期+孕穗期”;最佳补灌量是播前土壤补灌9mm,拔节期、孕穗期分别补灌40.5mm;分次补灌效应优于一次性集中补灌,补灌可有效地提高水分利用效率(WUE);适时适量补灌效应的研究,表明了补灌的必要性、重要性、迫切性,也可为半干旱区水分高效利用提供一定的理论依据。
The experiment of yield and water content of winter wheat was conducted under the conditions of limited irrigation in Qingshui experimental station in the semiarid area of northern and southern Longnan so as to get the best combination point in the supplementary irrigation period. The results showed that under the conditions of supplementary irrigation, the best period for filling irrigation of winter wheat with surface drip irrigation was at "jointing stage + booting stage Booting period respectively fill 40.5mm; sub-filling irrigation effect is better than a one-time centralized filling irrigation, filling irrigation can effectively improve water use efficiency (WUE); timely and appropriate irrigation effect, indicating the necessity of irrigation, Importance and urgency, but also provide a theoretical basis for the efficient use of water in semi-arid areas.