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通过对黄河三角洲地区棉田、果园、林地和荒地4种不同土地利用方式下土壤样品的采集与理化指标的分析,研究了该区域不同土地利用方式对轻度盐渍化土壤的改良功能。结果显示:果园土壤的容重、pH值和全盐含量等物理性状要优于其它3种用地方式;棉田土壤有机质与全N、全P和全K含量超过果园与林地土壤,而速效N和速效P含量以果园土壤最高,速效K含量以棉田最高,果园土壤最低;果园土壤C/N比值明显高于其它3种用地方式,以荒地土壤的C/N比值最低。综合分析认为:种植果树对土壤的物理性状改良效果较好,种植棉花对土壤的化学性状具有较好的改良效果。
Through the analysis of soil samples collected under four different land use patterns in the cotton fields, orchards, woodlands and wasteland in the Yellow River Delta, the improved functions of different land use patterns on the lightly saline soil were studied. The results showed that the physical properties such as bulk density, pH value and total salt content of orchard soil were better than those of the other three kinds of land use types. The contents of soil organic matter and total N, total P and total K in cotton field exceeded those in orchard and forest soil, The content of P was the highest in orchard soil, the content of available K was the highest in cotton field and the lowest in orchard soil. The soil C / N ratio in orchard was obviously higher than the other three kinds of land use, and the wasteland soil had the lowest C / N ratio. Comprehensive analysis shows that: planting fruit trees to improve the physical properties of soil better, planting cotton on the chemical properties of the soil has better improved results.