不同时期施用腐殖酸钾对杨树生长的影响

Effects of Potassium Humate Application at Different Periods on Populus Growth

为探究不同时期施用腐殖酸钾对杨树生长的影响,以甘肃省河西地区的杨树为研究对象,考察对比了不同时间段追施腐殖酸钾肥后杨树的树高、胸径以及木质基本密度。结果显示:3种不同追肥方式下,1 a后杨树幼苗的树高、胸径、木质基本密度均显著高于未进行施肥处理的杨树幼苗,其中分别在4月和10月均进行施肥处理的树高最高(7.17 m)、胸径最大(8.02 cm)、木质基本密度相对较高(0.38 g/cm^(3)),为本次试验中最佳的施肥方式。

In order to explore the effects of potassium humate application on the growth of Populus in different periods,Populus in Hexi area of Gansu Province were taken as the research object,and the tree height,DBH and basic wood density of Populus after applying potassium humate fertilizer in different periods were investigated and compared.The results showed that under three different topdressing methods,the tree height,DBH and basic wood density of Populus seedlings after 1 year were significantly higher than those without fertilization treatment.The trees treated with fertilization in April and October were the highest in height(7.17 m),the largest in diameter at breast height(8.02 cm),and the basic density of wood was relatively high(0.38 g/cm^(3)),which was the best fertilization method in this experiment.