论文部分内容阅读
在ＮＬ—８０１０５、ＮＬ—８０１０６杨树林带中进行五种同价值不同种类肥料的施肥试验。施肥３ａ后调查结果表明，施肥对上述两种杨树的单株材积、胸径、树高生长有明显的促进作用。施肥效果依次是：复合肥＞尿素＞磷酸二铵＞过磷酸钙＞硫酸钾。
In NL-80105, NL-80106 poplar belt with five different values of different types of fertilizers fertilizer test. After fertilization 3a survey results show that fertilizer on the two kinds of poplar single plant volume, DBH, tree height growth significantly promote. The results are as follows: compound fertilizer> urea> diammonium phosphate> superphosphate> potassium sulfate.