CAJ | 학술논문

为了促进激光平地技术的应用与推广,在河套灌区以普通畦田为对照,分期、分段测定了激光平地畦田0~80 cm土层土壤水分、土壤盐分及春小麦生长状况.结果表明,从渠口到畦尾,激光平地畦田不同地段的土壤水分在春小麦生长的不同时期无显著差异,但从拔节期开始,上层土壤盐分逐渐升高;普通畦田从三叶期开始,上层土壤水分、盐分逐渐提高,且显著或极显著高于激光平地.普通畦田从三叶期开始,激光平地从拔节期开始,从渠口到畦尾,春小麦的生长状况逐渐变差,千粒质量、产量均逐渐降低,但激光平地的春小麦千粒质量、产量高于普通畦田.激光平地改善了畦田的土壤水分、盐分分布,促进了畦田中后段的春小麦生长,提高了畦田中后段的水分利用率及产出率.
위료촉진격광평지기술적응용여추엄,재하투관구이보통휴전위대조,분기、분단측정료격광평지휴전0~80 cm토층토양수분、토양염분급춘소맥생장상황.결과표명,종거구도휴미,격광평지휴전불동지단적토양수분재춘소맥생장적불동시기무현저차이,단종발절기개시,상층토양염분축점승고;보통휴전종삼협기개시,상층토양수분、염분축점제고,차현저혹겁현저고우격광평지.보통휴전종삼협기개시,격광평지종발절기개시,종거구도휴미,춘소맥적생장상황축점변차,천립질량、산량균축점강저,단격광평지적춘소맥천립질량、산량고우보통휴전.격광평지개선료휴전적토양수분、염분분포,촉진료휴전중후단적춘소맥생장,제고료휴전중후단적수분이용솔급산출솔.
@@@@In order to promote the laser land leveling technology in Hetao Irrigation District, compared with ordinary border, soil moisture, soil salinity in 0-80 cm depth and spring wheat growth of border with laser land leveling were determined in different segments at different stages of spring wheat growth. The results showed that the soil moisture of border with laser land leveling had no significant difference in different segments at different stages of spring wheat growth, but the soil moisture in roots distribution soil layer (0-40 cm) of ordinary border gradually increased from water inlet to border trail from spring wheat trefoil stage to maturity stage, and reached significant or very significant difference between different segments, as well the soil moisture of roots distribution soil layer of ordinary border in middle and posterior segment were significantly or very significantly higher than border with laser land leveling. Laser land leveling caused irrigation water uniformly distributed in the border. Soil salt accumulation in surface soil in ordinary border began from spring wheat trefoil stage, and in laser land leveling border began from spring wheat jointing stage, as well soil salt accumulation in surface soil in laser land leveling border was 20d later than that in ordinary border. Soil salinity in roots distribution soil layer of ordinary border and laser land leveling border all gradually increased from water inlet to border trail, and the soil salinity of ordinary border in middle and posterior segment were significantly or very significantly higher than that of laser land leveling border. For ordinary border from spring wheat trefoil stage and laser land leveling border from spring wheat jointing stage, the spring wheat growth situation became worse from water inlet to border trail, and the thousand-grain weight, wheat yields in spring wheat maturity stage gradually decreased, but the thousand-grain weight, wheat yields of laser land leveling border in middle and posterior segment were significantly or very significantly higher than that of ordinary border. This research indicated that laser land leveling technology improved soil moisture and salinity distribution in border, promoted spring wheat growth, boosted water use efficiency and the water output rate in middle and posterior segment of border.