施肥对光皮桦生长量影响初探

在福建安溪虎邱官埔林场对4a生光皮桦林分进行施肥试验。1a后,调查光皮桦的胸径和树高,计算不同施肥试验对光皮桦生长量的影响。结果表明:施肥对4a生光皮桦的生长有明显促进作用,不同施肥处理对光皮桦胸径、树高、材积生长量影响都达到显著水平,与对照(未施肥)相比,胸径增幅为21.07%～32.23%,树高增幅为19.78%～32.23%,单株材积增幅达86.58%～115.72%,本试验以尿素(N含量46%)和洋丰复合肥(N:P:K=15:15:15)各75g混合施肥方式效果最好,单株材积平均增幅达115.72%。

Exploration on Apply Fertilizer Effect on Growth of Betula luminifera H. Winkl

Different applying fertilizers in four-year-old Betula luminifera H.Winkl stand in Guanpu forest farm in Anxi County were adopted.After one year,DBH and height were investigated,then,The effect on different test of apply fertilizer for growth was calculated,the results showed that the growth of four-year-old Betula luminifera H.Winkl apply fertilizer promoted obviously,different fertilizer in DBH,height,volume has significant level.Compared with no fertilizer DBH increased 21.07%～32.23%,height increased 19.78%～32.23%,single plant volume increased 86.58%～115.72%,the best selection of urea 75 g and compound fertilizer 75 g（N：P：K=15：15：15）,single plant volume increased 115.72%.