竹林土壤对毛竹笋材产量的贡献率及肥效分析

在福建省三明市三元区岩前镇、将乐县漠源乡开展了毛竹笋材两用林3414田间施肥试验，结果表明，土壤肥力对毛竹笋竹产量的贡献率分别是39．54％（岩前点）、59．51％（漠源点）。不同试验点的氮磷钾肥料对竹林产量的增产效果有差异，岩前点肥料效应高于漠源点；平均增产效果以氮肥最为显著，其次是磷肥、钾肥。各肥料的利用率以钾肥的利用率最高，氮肥居中，磷肥最低。在中低产量水平的笋材两用竹林中，施氮磷钾配比肥对竹林产量有明显的增产效果，可发挥良好的肥料效应。

Analysis of Soil Condition on the Contribution Rate to Shoot and Timber Yield and Fertilizer Effects in Moso Bamboo Stands

The 3414 field fertilizer tests of shoot and timber producing stands of Phyllostachys edulis were held in Yangqian Town and Moyuan Township, Sanming City. The results showed that soil fertility contributed 39.54% （Yangqian test point） and 59.51% （Moyuan test point） respectively to the shoot and timber yield. The differences were found on yield -increas- ing effect for shoot and timber production between two test points after the application of N, P, K fertilizer, fertilizer benefit in Yangqian test point contributed more to bamboo yield than that in Moyuan test point. N fertilizer had the best yield -in- creasing effect, while P fertilizer and K fertilizer were lower than the former. K fertilizer had the best fertilizer utilization rate, N fertilizer takes second place and P fertilizer was the lowest. In medium and low yield levels of bamboo stands, there were significant increases on yield for shoot and timber producing stands after the application of nitrogen, phosphorus, potas- sium fertilizer with rational proportion, and the complete fertilizer had the adequate fertilization benefit.