施肥对杉木幼林生长效应影响的研究

杉木林进行4a施肥试验,结果表明,施用复合肥和钙镁磷肥能明显促进杉木幼林生长。4a生杉木幼林树高生长分别比对照增加67.4%和73.9%,地径生长分别比对照增加96.8%和103.7%;7a生杉木幼林树高生长分别比对照增加64.6%和88.7%,地径生长分别增加76.1%和69.1%,钙镁磷肥对杉木生长具明显后效作用。尿素和氯化钾肥对杉木幼林生长影响不明显。

Study Effect on Influence of Young Chinese Fir Growth Applying Fertilizer

The experiments of applying fertilizers to Chinese fir young growth.The results proved that complex fertilizer and calcium magnesium phosphate had remarkable effect to the tree growth of young growth.For four year's Chinese fir tree height increment was higher than control plots by 67.4 percent and 73.9 percent.diameter at ground height increased by 96.8 percent and 103.7 percent respectively for 7 year's,tree height increment was higher than control plots by 64.6 percent and 88.7 percent,diameter at ground height increased by 76.1 percent and 69.1 percent respectively.Calcium magnesium phosphate had obvious delayed effect in promoting the growth of Chinese fir.Urea and potassium chloride were not outstanding effect in promoting tree growth of Chinese fir young growth.