杜仲专用肥肥效试验

Evaluating the Effects of the Compound Fertilizers Specified for Eucommia ulmoides Oliv

通过大田多点肥料对比试验 ,研究了杜仲专用肥的肥效。结果表明 ,施用杜仲专用肥能极显著地促进杜仲高、径的生长及树体的生物量。施用专用肥 ,杜仲当年平均高生长比不施肥处理和施用等氮、磷、钾养分处理分别增加了 63.0 %和 2 0 .5 % ,胸径分别增加了 43.2 %和1 7.8% ;当年干皮、叶生物量和地上部分生物量施用专用肥与不施肥比较分别增加了 68.4%、71 .6%和 75 .8% ,与等氮、磷、钾养分处理相比也分别提高了 2 5 .8%、5 6.0 %和 2 8.6%。同时 ,专用肥具有较长的后效 ,施专用肥处理比不施肥处理第 2 a的胸径增长和高生长分别增加了92 .9%和 1 0 3.8% ,比等氮、磷、钾养分处理分别增加了 42 .1 %和 6.0 % ,专用肥处理比不施肥处理 2 a总的胸径增长和高生长分别增加了 64.6%和 76.3% ,比等养分肥分别增加了 2 8.9%和 1 4.6%。

Field experiments carried out at different sites to evaluate the effects of the compound fertilizers specified(ES fertilizer) for Eucommia ulmoides .The results showed that the application of ES fertilizer significantly increased the height and diameter of Eucommia ulmoides ; so did the biomass weights of different parts of Eucommia ulmoides . Compared to the treatment without the fertilizers, the application of ES fertilizer in the first year increased the height of Eucommia ulmoides by 63.0%, the diameter by 43.2%, the dry weight of bark by 68.4%, the weight of leaves by 71.6%, and total biomass weight by 75.8%; the corresponding increased values to the treatment of application of equal amounts of N, P, and K fertilizer were 20.5%, 17.8%, 25.8%, 56.0%, and 28.6% respectively. Furthermore, the treatment applied the ES fertilizer had a long term residual of the nutrients. In the second year after the fertilization, the diameter and height of the ES fertilizer treatment were more than 92.9% and 103.8% of those in the treatment without fertilizers respectively; and the accumulated increased rates in two years were 64.6% and 76.3%; the corresponding increased values to the treatment of application of equal amounts of N, P, and K fertilizer were 42.1%, 6.0%, 28.9% and 14.6% respectively.