【摘要】 比较三种耐盐牧草生物修复盐渍化耕地效果得出:各处理较对照在0-90 cm土层范围内土壤含盐量降低了12.30%-19.86%。牧草植株不同品种、不同生育期内对K+、Na+的选择吸收能力存在差异,主要表现在:沙打旺苗期植株K+、Na+含量最高但收获期降至最低;碱茅草和小黑麦收获期的K+含量保持在较高水平,且Na+含量比苗期均有增加;苗期和收获期SK/Na值均以小黑麦最高,沙打旺居中,碱茅草最低;通过收获植株地上部秸秆Na+移出量分别为:小黑麦:38.03kg/hm2,沙打旺:13.68 kg/hm2,碱茅草:13.24 kg/hm2,种植小黑麦修复盐渍化耕地效果最佳。更多还原

【Abstract】 Comparative experiment of there kinds of forage remediating Salt alkali Farmland was carried out.The results showed that salt content can be reduced from 12.30% to 19.86% of the 0-90cm soil layers,The capacity of choice absorbing for K+,Na+ exists differences during growing period and species of the forage: In seedling period two ion express highest but lowest at harvest for A.pall;Yet P.spp.and Tricale be concluded:K+content remaining higher level while Na+ was increasing than before.The SK/Na value of tricale is higher than A.pall.and aslo P.spp.Na+ can be take away from farmland through havest Straw stalk as this: Tricale:38.03Kg/hm2;A.pall:13.68 Kg/hm2;P.spp:13.24 Kg/hm2.Growing Tricale is the best choice to remediate saline-alkali Farmland.更多还原