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在豫北耕作层保水能力较差的砂壤土地带，围绕节水和增收，开展了夏玉米沟灌、常规畦灌及减少生育期内灌水次数的试验研究，每次畦灌定额控制在６３０～６８２．５ｍ３·ｈｍ－２，而沟灌条件下平均灌水量仅为４４２．５ｍ３·ｈｍ－２。研究结果表明，反映夏玉米生长速率的株高、叶面积指数等性状均是以抽雄期为界，之前增长迅速；抽雄时植株高度达２．５０ｍ左右，之后增长速率明显减慢；而抽雄至灌浆初期，叶面积指数保持在５．４０～５．９２的最高值，往后急剧地下降。不同灌水处理下生长速率的变化则是随着供水总量的增加呈同步增长趋势。在干旱年份，畦灌夏玉米全生长期耗水４２７８ｍ３·ｈｍ－２，沟灌及减少灌水次数的处理，耗水量分别为３７６２ｍ３·ｈｍ－２和３３４８ｍ３·ｈｍ－２。按生长阶段比较，抽雄～开花期日耗水强度最大，为６６．７５～７６．５０ｍ３·ｈｍ－２；其次是拔节～抽雄期，平均为６５．５０ｍ３·ｈｍ－２；播种～出苗期间日耗水强度仅为１３．３５ｍ３·ｈｍ－２。不同的灌溉方式与灌水量对夏玉米的穗粒重、千粒重及粒占穗重的百分比都有影响。对于宽行稀植作物采用沟灌方式，灌溉用水量小（平均为４４２．５ｍ３·ｈｍ－２），所供的水能集中于植株的根际附近，?
In sandy loam area with poor water holding capacity in the north of Henan Province, the pilot study on furrow irrigation, conventional furrow irrigation and irrigation times reduction in summer maize was carried out around water saving and income increase. Each irrigation quota was controlled at 630 ~ 682.5m3 · Hm-2, while the average irrigation under furrow irrigation was only 442.5m3 · hm-2. The results showed that the plant height and leaf area index, which reflect the growth rate of summer maize, were all bounded by the tasseling period and had a rapid increase before. At the tasseling stage, the height of the plant reached about 2.50 m, and then the growth rate slowed down significantly. In the early filling stage, the leaf area index kept at the highest value of 5.40 ~ 5.92 and dropped sharply in the future. The change of growth rate under different irrigation treatments shows a synchronous increase trend with the increase of total water supply. During the drought years, the water consumption of irrigation was 4278m3 · hm-2 during the whole growth period of maize irrigation and irrigation, and irrigation water was 3762m3 · hm-2 and 3348m3 · hm-2 respectively. According to the growth stages, the highest water consumption intensity was 66.75 ~ 76.50m3 · hm-2 in the stage of tasselling ~ flowering, followed by the stage of jointing-tasseling with an average of 65.50m3 · hm-2. Water intensity is only 13.35m3 · hm-2. Different irrigation methods and irrigation amount have an impact on the percentage of spike weight, thousand kernel weight and kernel weight per spike of summer maize. For the wide row of sparsely populated crops using furrow irrigation, irrigation water consumption is small (average 442.5m3 · hm-2), the water can be concentrated in the plant near the rhizosphere ,?