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以塑管渗灌技术为基础发展起来的简易微喷灌技术,除具有渗灌的优点外,还具有可移动、投资小、简便灵活、适应性广等特点。小麦越冬期即使补水量不大,也可使土壤水分有明显的增加,到翌年春,50~80cm土层含水量补水田高于对照2.57%。小麦返青期补水0~30cm土层平均比对照高3.39%。1997-1998年在特殊干旱条件下,不同补水时期的增产效应为抽穗期>拔节期>返青期。补水量在450m3/hm2以内,随补水量的增加,增产幅度增大。地膜覆盖加补水产量增加366.0~1324.5kg/hm2,增产率为25.0%~90.4%。裸地麦田补水产量可增加315.0~701.6kg/hm2,增产率为22.5%~50.2%,产投比为1.2~1.6。实践证明该技术可操作性强,具有广阔的推广应用前景。
Simple plastic sprinkler irrigation technology developed on the basis of plastic pipe infiltration technology, in addition to the advantages of infiltration irrigation, has the characteristics of being mobile, small investment, simple and flexible, wide adaptability. Even if winter wheat water supplement is not large, can also significantly increase the soil moisture, the spring of next year, 50 ~ 80cm soil moisture recharge paddy 2.57% higher than the control. The wheat rejuvenation 0 ~ 30cm soil layer average higher than the control 3.39%. During the period of 1997-1998 under special drought conditions, the yield-increasing effects of different water recharge periods were heading stage, jointing stage and greening stage. Replenishment volume within 450m3 / hm2 less, with the increase of water replenishment, increase rate of increase. Film mulching and watering increased by 366.0 ~ 1324.5kg / hm2, yield increasing rate was 25.0% ~ 90.4%. Crop yield of bare land wheat field can increase 315.0 ~ 701.6kg / hm2, yield increase rate of 22.5% ~ 50.2%, production to investment ratio of 1.2 ~ 1.6. Practice has proved that the technology is highly operable and has broad prospects for popularization and application.