不同栽培措施下火炬松穗条产量的变化

Comparison of Cutting Yield of Pinus taeda under Different Managements

以1年生火炬松Pinus taeda实生苗为材料,进行3因素(截干高度、施肥配方、种植密度)3水平L9(3~4)正交试验,分析不同栽培措施对穗条产量的影响。结果表明,春季促进穗条产量增加的优化组合为截干高度15 cm,施用农家肥,种植行间距50 cm×80 cm;夏季优化组合为施用农家肥+复合肥,截干高度15 cm,种植行间距为50 cm×80 cm;秋季优化组合为施用农家肥+复合肥,种植行间距50 cm×80 cm,截干高度为12 cm;冬季优化组合为施用农家肥,截干高度15 cm,种植行间距40 cm×50 cm;提高单株穗条年产量的优化组合为施用农家肥+复合肥,截干高度15 cm,种植行间距40 cm×50 cm。因此,在火炬松生长不同时期,选用不同的栽培措施有助于提高穗条产量。

In order to build a high-yield cutting nursery of Pinus taeda,the 3-level L9(34)orthogonal test was conducted.The results showed that the optimum combination of cutting yield in spring was 15 cm truncation height,row spacing of 50 cm×80 cm;in summer,the optimized combination was farmyard manure+compound fertilizer,15 cm truncation height,row spacing of 50 cm×80 cm;in autumn,the optimized combination was farmyard manure+compound fertilizer,row spacing of 50 cm×80 cm,and 12 cm truncation height;in winter,the optimum combination was farmyard manure,15 cm truncation height,and row spacing of 40 cm×50 cm.Improved combination of annual cutting yield was farmyard manure+compound fertilizer,15 cm truncation height,and row spacing of 40 cm×50 cm.Therefore,there should be used different management measures in different periods for increasing cutting yield of Pinus taeda.