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采用大田试验,研究自然降雨+氮肥底施、表施氮肥+大水漫灌、滴灌水氮一体化不同水肥管理对东北地区低、中、高不同密度下春玉米产量、干物质及水氮利用的影响。结果表明,滴灌水氮一体化处理在各密度下均较自然降雨+氮肥底施显著提高玉米产量,在高密度时滴灌水氮一体化处理产量最高为14 268.9 kg/hm2,显著高于表施氮肥+大水漫灌处理。在高密度时,与表施氮肥+大水漫处理相比,滴灌水氮一体化处理可获得较高的总干物质积累量,显著提高花后氮素积累量,总氮量增加78.2%,进而提高氮肥偏生产力和水分利用效率。滴灌水氮一体化处理能够在高密度下提高东北玉米产量的同时提高水氮利用效率。
Field experiments were conducted to study the effects of natural rainfall + nitrogen fertilizer at the bottom, surface nitrogen fertilizer + flood irrigation, drip irrigation and nitrogen fertilizer on the yield, dry matter and water and nitrogen utilization of spring maize at low, medium and high densities in Northeast China influences. The results showed that the integrated treatment of drip irrigation with nitrogen at all densities significantly increased the yield of corn at all densities compared with natural rainfall + nitrogenous fertilizer. The highest yield of nitrogen integrated drip irrigation was 14 268.9 kg / hm2 at high density, Nitrogen fertilizer + flood irrigation treatment. At high density, compared with N application + Dafuman table, the integrated N treatment resulted in higher total dry matter accumulation, significantly increased the post-anthesis nitrogen accumulation, and the total N increased by 78.2% And then increase the partial nitrogen fertility and water use efficiency. Drip Irrigation Nitrogen Integrated treatment can improve the water and nitrogen use efficiency while improving the yield of northeast corn at high density.