钢渣肥在毛竹林经营中的肥效研究

对2种林分密度（低密度、高密度）、3种施肥处理（尿素、生物有机肥和钢渣肥）的毛竹胸径、新竹生长状况、相对增长产量进行研究，以确定钢渣肥能否替代复合肥和生物有机肥。结果表明：3种不同施肥处理间新竹株数、胸径以及产量均无明显差异；在不同密度条件下，新竹株数与产量同样没有产生明显差异，而对于平均胸径则为低密度林分明显高于高密度林分（P=0.041<0.05）。3种不同施肥处理并未对毛竹相对增产量产生显著差异（P=0.138>0.05）；在试验所设的2种密度中，低密度毛竹林相对增长产量显著高于高密度毛竹林（P=0.023<0.05）。基于钢渣肥较低的成本，在生产上可以用其取代尿素和生物有机肥，以提高竹林经营效益。

The Effect of Steel Slag Fertilizer on Moso Bamboo Forest

The BDH (diameter at breast height), the new bamboo growth and relative growth production were studied under two stand density models of Phyllostachys edulis forest (low density and high density) in three different fertilization (urea, bio-organic fertilizer and steel slag fertilizer), to determinate if steel slag fertilizer can replace compound fertilizer and bio-organic fertilizer. The results showed that no significant difference was found in terms of new culm quantity, BDH and production among the three different fertilizers; and no significant difference was found in terms of the new culm quantity and production between the two different stand densities. The average DBH under low stand density was higher than that under high stand density (P=0.041<0.05). No significant difference was found in relative growth production among the three different fertilizers (P=0.138>0.05). Relative growth production of low stand density bamboo forest was higher than that of high stand density bamboo forest (P=0.023<0.05). As the cost of steel slag fertilizer is lower, it can replace urea and bio-organic fertilizer to improve the benefits of moso bamboo forest management.