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近年来,随着技术的进步和投入的增加,旱作小麦的产量逐步提高,面积不断扩大,旱地夏玉米的面积也随之增加。玉米在丰水条件下可充分利用光、热、水资源,发挥下茬作物的增产优势。但它的抗旱性却比不上其它小作物。北方旱地夏玉米虽然与降雨同步,但降雨年际间变化大,季间季内分布不匀。据我们多年的试验、观察及生产分析,只有采取因墒量雨管理,才能取得理想效果。 一、抢墒量墒播种。旱地夏玉米受降雨不匀的影响,成熟期常较灌溉区偏晚,以往只强调抢墒播种,结果很多年份形成小老苗。近几年来通过试验,根据小麦长势与耗水关系,运用小麦长势产量指标和降
In recent years, with the improvement of technology and investment, the output of dry-cultivated wheat has been gradually increased and its area has been continuously expanded. The area of dry-land summer maize has also increased. Under abundant water conditions, corn can make full use of light, heat and water resources, giving full play to the yield-increasing advantages of the next crop. But its drought resistance is less than other small crops. Although the summer maize in north China is synchronous with the rainfall, the rainfall varies greatly from year to year, unevenly distributed in the season. According to our many years of experiments, observations and production analysis, only by taking due to the amount of rainfall management, in order to achieve the desired results. First, grab the amount of moisture sowing seeding. Dry summer maize affected by uneven rainfall, maturity is often late than the irrigated area, in the past only stressed the grab moisture sowing, the results of the formation of small seedlings in many years. In recent years through experiments, according to the relationship between wheat growth and water consumption, the use of wheat yield indicators and down