【摘要】 本文重点总结了我国在宁夏中卫腾格里沙漠中,平整流动沙丘引黄淤灌改良流沙地及在流沙地铺设隔水层的试验结果。试验表明,经引黄淤灌15年后,可沉积淤泥厚达22厘米。通过施肥、种植农林植物等措施,使原来单相流沙改良成为有层次的耕作土壤。经淤灌并加薄膜塑料隔水层后,所种植的农林作物增产效果显著,与对照相比,黄豆增产277.8%,玉米增产238.4%。一年生沙冬青苗高生长增加165%,地茎粗增加200%,二年生侧柏幼苗高生长增加163%,地茎粗增加79%。更多还原

【Abstract】 In the study,the testing results for levelling and transforming shifting sand dunes with pumping irrigation of the Yellow River water and for preventing water from infiltration with bedding plastic sheets underlying the dunes are summerized. The testing results indicate that 22 cm of topsoil is formed on surface after 15 years’irrigation. Pure sand soil is changed into arable soil by planting crop and Leguminosae spp. and by usin g fertilizers. The plastic sheets are applied for keeping good moisture in the irrigated area and per unit area yield of sobean and maize increased 277.8% and 238.4% separately. The height and diameter of seedlings of sand-holding species (Ammopitanthus mongolicum, Biota orientalis) also increased in compari-son with that in the area without any artificial measures.更多还原