【摘要】 在克拉玛依农业开发区,采用区域调查的方法,调查分析了耕地、草地、林地3种不同土地利用方式对土壤盐分的影响。结果表明:在相同种植年限,不同土地利用方式下,土壤盐分含量:林地>草地>耕地;在相同土地利用方式下,土壤盐分含量与种植年限成反比,且随着种植年限的增加,盐分含量降低的幅度越来越小。在不同的种植结构中,轮作土壤盐分含量是连作的2.3倍,在轮作中,瓜/棉花轮作的土壤盐分含量比苜蓿/棉花低35.06%;林地土壤盐分的表聚性较强,0~10 cm的盐分含量占到土壤剖面盐分含量的42.28%,而耕地和草地的盐分大量积聚在30~60 cm。更多还原

【Abstract】 The experiments were conducted in farmland,grassland,woodland in Karamay development zones to investigate the influence of land utilization way on soil salt.The results indicated that they were planted in the same fixed number of years with different land utilization way,their arrange of order by the content of soil salt was:woodland >grassland >farmland;Although the same land utilization way was adopted,the content of soil salt was inversely proportioned to the planting fixed number of years.Sometimes the planting fixed number of years was increased,there was little possibility of decreasing salt content.Based on different planting structure,soil salt content of rotationed cropping was 2.3 times that of continuous cropping.In the rotational cropping,salt content of melon/cotton was less 35.06% than that of clover/cotton.The salt content in 0-10 cm soil layer is 42.28% of soil profile in woodland,and in farmland and grassland is the most significant in 30-60 cm soil layer.更多还原