【摘要】 研究黄河三角洲重盐碱地5年生白刺林和新淤地上18年生不同类型林分土壤盐分和养分的变化规律。结果表明:白刺造林后显著地促进了土壤脱盐,明显地提高了土壤肥力;新淤地上植树造林能有效抑制土壤返盐,培肥地力;不同类型林分防止土壤次生盐渍化的效果没有差异,杨树、刺槐行间混交林提高土壤肥力的效果最好。更多还原

【Abstract】 The soil salt and nutrient of 5-year-old Nitraria sibirica stand growing in heavy salinized soil were measured.The result showed that soil salt content(0～20 cm soil depth) of 5-year-old Nitraria sibirica stand decreased significantly and the soil nutrient content increased obviously compared with the unafforested land.In the neo-alluvial land area,the soil salt and nutrient of different types of forest stands afforested 18 years ago were measured.The result showed that the soil salt decreased significantly and soil nutrient increased obviously in different stands.Although the effects on controlling soil secondly salinized were no difference among the different stands,the content of soil organic matter and available nitrogen of poplar and acacia mixed stand row by row was the highest among all kinds of stands.更多还原