【摘要】 通过对河北省张家口市黄羊滩防护林带内封育草场和防护林带外未封育保护沙化草场的理化性质对比,分析封育和防护林带对沙化草场土壤理化性质影响。结果表明,封育和防护林带可以显著地改善沙化草场土壤机械组成,提高土壤养分含量,其中细沙、粗粉沙和物理黏粒的平均百分含量较未封育沙化草场分别增加了4.26%、10.20%和12.08%,有机质、全氮、全磷、全钾、碱解氮、速效磷、速效钾的平均含量总体提高了203.65%。研究成果为采用植被建设措施改良沙化草场提供了科学依据。更多还原

【Abstract】 In this paper,soil physicochemical properties were compared between enclosed meadow in shelter belt and desertified meadow of Huang Yangtan Hebei Province,and the effect of enclosure and shelter belt on desertified meadow soil was investigated completely.The soil mechanical composition and soil nutrient can be ameliorated by enclosure and shelter belt,and the average percentage composition of fine sand,sand clay and physical clay have been increased respectively 4.26%,10.20% and 12.08% compared with the desertified meadow,the average percentage composition of total nitrogen,total phosphorus,total potassium,alkali-hydrolyzable nitrogen,rapidly available phosphorus and rapidly available potassium have been increased to 203.65%.更多还原