【摘要】 通过在黄骅中捷农场设置海冰水(盐分浓度为3‰)4个不同灌溉量试验,研究了海冰水灌溉量对土壤含水量、灌溉水利用效率及棉花生物学性状的影响。结果表明,各处理均表现为0～100 cm土层随着灌溉量增大,土壤含水量增大;播种前采用海冰水灌溉可以有效缓解环渤海滨海盐碱地土壤旱情,有利于淋洗土壤盐分,是解决当地干旱问题和提高棉花出苗率的一项有效措施。海冰水不同灌溉量处理显著影响棉花的生物学性状和灌溉水利用效率,表现为随着灌水量的增加,棉花的株高、果枝数增加,棉桃数、籽棉产量和灌溉水利用效率显著增加,均在每次灌水量525 m3/hm2、灌溉2次时达到最大值,产量达到3265.78 kg/hm2,灌溉水利用效率达到1.94kg/m3,之后随着灌溉量增加反而降低。因此,试验区在降雨量正常年份利用3‰海冰水进行棉田灌溉时,建议每次灌水量为525 m3/hm2。更多还原

【Abstract】 A field experiment was conducted on Zhongjie Farm in Huanghua to research soil moisture change after irrigation,effect of water use efficiency and biological characteristics of cotton under a different amount of irrigation of 3‰ salinity sea-ice.The results showed that sea-ice water irrigation could improve moisture content of topsoil significantly,and the higher irrigation amount the greater soil moisture content in 0～100 cm soil layers;Irrigation before sowing with sea-ice could ease the drought in coastal saline soil of the Bohai coastal region and it is conducive to leaching of soil salinity.So it was an effective measure of solving drought problems and improving rate of seedling emergence.Different amounts of sea-ice water irrigation significantly affect the biological characteristics of cotton and soil water use efficiency.The cotton plant height,fruit branch number,boll number,the seed cotton yield and soil water use efficiency were significantly increasing with the irrigation of sea-ice irrigation.And they all reached the maximum by the irrigation amount of 525 m3/hm2,but later decreased with increased irrigation.By all the knowable research above,the result that when using cotton 3 ‰ sea-ice water for irrigation,the irrigation amount should be 525 m3/hm2 was suggested in this paper.更多还原