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从土壤物理学角度分析黄淮海试区中下水平土壤肥力条件下一种节水高产技术体系的管理策略,采取推迟播种15～21d控制冬前分蘖减少水分消耗,保持表土干燥减少土壤水分蒸发,播前灌底墒水在土壤深层储存水分,集中施用P肥促进小麦根系下扎等措施,充分利用了植物根系的向水性,引导根系下扎,并扩大土壤深层吸水体积,使播种后不灌水小麦产量达6000kg/hm~2,灌1水小麦产量约7500kg/hm~2,水分利用效率>15.0kg/hm~2·mm。
From the point of view of soil physics, this paper analyzed a management strategy of a water-saving and high-yielding technical system under middle-lower horizontal soil fertility in Huang-Huai-hai pilot area. It took 15-21 days to postpone the control of tillering before winter to reduce the water consumption and keep the topsoil dry to reduce soil water evaporation. Pre-sowing water at the end of irrigation in deep soil moisture storage, P fertilizer to promote the use of P fertilizer to promote the root system under the bar and other measures to make full use of the plant’s water to the roots, the root guide under the bar, and expand the deep soil water absorption, so that after sowing non-irrigation of wheat The yield was 6000kg / hm ~ 2, the yield of wheat was 1 7500kg / hm ~ 2, and the water use efficiency was> 15.0kg / hm ~ 2 · mm.