【摘要】 该文通过对辽西北风沙土经过3种绿肥改良后土壤理化性质的比较,及对在改良的地块上栽植平榛后的经济效益进行分析,结果表明:改良后土壤物理性质得到明显改善,土壤容重变小、总孔隙度增大、土壤的最大持水量和通气度均有所提高;土壤养分含量大幅提高,栽植的平榛长势良好,产量可观,经济效益显著,这种改良利用模式为辽西北风沙区土壤改良提供借鉴。更多还原

【Abstract】 Through the comparison of physicochemical properties of aeolian sandy soil of Liaoning Northwest before and after improvement by planting soybean,Astragalus adsurgens and alfalfa and the analysis of economic benefit of Corylus heterophylla planted in the improved soil,the article reaches the following conclusions: physicochemical properties of aeolian sandy soil improved with the tree types of green manure were improved obviously,with the reduction of volume weight,the increase of the total porosity,and the improvement of both the maximum water-holding capacity and the venting quality;the nutrient contents of the improved soil were greatly enhanced,Corylus heterophylla planted in the improved soil grew very well with high yield,bringing in remarkable economical benefit.This improvement and utilization patterns provides a good reference for the soil improvement of aeolian sandy areas of Liaoning Northwest.更多还原