【摘要】 在齐齐哈尔市各县区小黑杨人工林带中设置了67块标准地,49株平均解析木。通过对这些资料的统计分析,确定了不同立地条件下小黑杨人工林带平均木胸径、树高、材积的生长过程,建立了胸径、树高、材积各种生长因子的数学模型。更多还原

【Abstract】 Sixty-seven sample plots and 49 average analyzed timbers were set up in various counties and districts of Qiqihar city.Through analysis to these data,average trees DBH,tree height,growth process of volume of Populus simonii×P.nigra plantation in different site conditions were determined.Mathematical model of various growth factors,such as DBH,tree height,volume were established.更多还原