CAJ | 학술논문

通过烘干法和环刀法，对嫩江沙地不同林龄小黑杨防风固沙林的土壤容重、孔隙度和持水量进行了研究。结果表明：小黑杨防风固沙林对土壤物理性质有一定的改良作用，主要集中在0～20 cm土层中；随着林龄的递增，土壤田间持水量、毛管持水量、最大持水量、非毛管孔隙度、毛管孔隙度、总孔隙度0～40 cm土层表现出降低再升高的趋势，而容重表现则相反；40 cm土层以下物理性质变化不明显。
통과홍간법화배도법，대눈강사지불동림령소흑양방풍고사림적토양용중、공극도화지수량진행료연구。결과표명：소흑양방풍고사림대토양물이성질유일정적개량작용，주요집중재0～20 cm토층중；수착림령적체증，토양전간지수량、모관지수량、최대지수량、비모관공극도、모관공극도、총공극도0～40 cm토층표현출강저재승고적추세，이용중표현칙상반；40 cm토층이하물이성질변화불명현。
Soil bulk density ,soil porosity ,soil water holding capacity of windbreak and sand‐fixation forest of Popu‐lus simonii × P .nigra were studied by using method of drying method of cutting‐ring method .Result shows that sand‐fixing forest of Populus simonii × P .nigra has the function of improving these physical properties ,which mainly on 0‐20 cm soil layer .As ages of trees increasing ,field capacity ,the water holding capacity ,capillary water‐holding capacity ,non‐capillary porosity ,capillary porosity ,soil total porosity regularly decrease then remarkably in‐crease at the soil layer of 0‐40 cm ;soil bulk density shows the opposite;changes of physical properties are not obvi‐ous beneath the depth of 40 cm soil layer .