冬小麦水氮有效利用的研究

本文针对作物高产、高效和节约水肥资源的目的，研究了不同土壤水和氧水平下的小麦冠、根生长状况、籽粒产量、蒸散、N素吸收状况以及水分利用效率（WUE）和小麦氮索利用效率（NUEw）。结果表明，当相对含水量为75％～85％，施N量较高情况下，可以使小麦冠、根发育良好，使蒸散与吸N量提高，从而增加籽粒产量，提高WUE，并使NUEw达适中水平。文中也强调了单纯追求籽粒高产（高产，低效）或高效（低产高效）的不可取性。

Study on The Efficient Use of Soil Water and Nitrogen for Winter Wheat

For high production of crops and saving water and fertilizer resources, the growth and yield of wheat evapotranspiration (ET), N uptake, water use efficiency (WUE) and the nitrogen use efficiency for wheat (NUEw)were studied under various levels of soil water and N supply. The results showed that with soil moisture content 75% ~85% of field capacity and higher N suppey, shoot and root of wheat developed quite well, ET and N uptake were at high level, the yield of grain and WUE were increased and NUEw kept moderate. The unsuitability of seeking for either high production or high efficiency alone was emphasized in this paper.