小黑杨纸浆林生长发育特点及其与温度水分关系的研究

Study on the Growth and Development Feature of Lesser Black Poplar Pulp Plantation and Its Relations with Temperature and Water

通过连续多年的定位观测，弄清了小黑杨纸浆林生长发育的特点，得出了林分温度、水分的变化规律，并分析了生长发育与生态因子之间的关系；结果表明：小黑杨纸浆林的生长远远超过丰产林标准，８年以上就可满足国内制浆造纸要求；水分是小黑杨纸浆林生长的最主要限制因子，温度对小黑杨纸浆林生长的限制作用不大。小黑杨纸浆林的培育，在生长季早期应注意增加林地含水量，在整个培育过程中要采取松土、整枝等措施，改善林内光照，提高林地温度，以促进林分生长。

Through many years continuous conservation and measuring,we have recognized the growth andlevelopment feature of lesser black poplar pulp plantation and the change principle of temperature and water inthe Lesser Black Poplar pulp plantation and the relations between the growth of lesser black poplar pulp plan-tation and economic factors.It is shown that the growth of lesser black pulp plantation surpass largely the in-lex in the high yield plantation standard and it can satisfy the need of national standard that pulp plantation isolder than eight years old; water is the most important growth limitation factor of lesser black poplar pulpplantation,the limitation eftect of tempreture to lesser black poplar pulp plantation growth is small.For thecultivation of Lesser Black Poplar pulp plantation, we should increase the water quantity in the forest soil inrhe early period of growth season and take some essensial methods to improve the illumination in the pulpplantation, raise the soil temperature in the pulp plantation,and enrich pulp plantation growth.