施肥对红松和落叶松幼苗各器官养分含量的影响  

Effect of Fertilization on Nutrient Concentration of Organs for Korean Pine and Larch Seedlings

作　　者：周利勋[1] 刘广平[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2004年第1期18-21,共4页Journal of Northeast Forestry University

摘　　要：在苗圃内进行了 2a的重复施肥实验 ,研究了N、P、K施肥对红松 (Pinuskoraiensis)和落叶松 (Larixgmelinii)苗木各器官养分分配规律和产量的影响。结果表明 ,施肥后N和P主要累积在叶中 ,K因树种而异 ,红松叶 >茎 >根 ,落叶松茎 >根 >叶。不同施肥方案对红松苗木体内N、P、K分配均无显著影响 ,对落叶松叶中N含量的影响达到显著水平 (P =0 .0 4 7) ,茎中K含量影响达极显著水平 (P <0 .0 0 1)。磷酸氢二氨、尿素 +硫酸钾、过磷酸钙 +硫酸钾最佳施肥水平应为 4 0g m2 ,磷酸二氢钾 +尿素最佳施肥水平为 2 0g m2 ,而氮磷复合肥施肥水平对苗木体内养分含量影响不明显。The effects of N, P, K fertilization on nutrient distributions of root, stem and leaf for Korean pine(Pinus koraiensis )and larch(Larix gmelinii )seedlings were studied through 2-year repeat experiment in nursery. The results showed that nitrogen (N) and phosphorus (P) mainly distributed in leaf, while the distribution of potassium (K) element varied with species, namely, leaf>stem>root in Korean pine and stem>root>leaf in larch seedlings. The influences of different fertilization scheme on the N, P, K distributions in Korean pine wasn't significant, while that on N concentration in leaf for larch reached significant level and that on K concentration in stem come to distinctly significant level. The optimum fertilization level of fertilizer (NH 4) 2HPO 4, CO(NH 2) 2+K 2SO 4, Ca(H 2PO 4) 2H 2O+CaSO 4+K 2SO 4 was 40、gm2 and that of fertilizer urea+ KH 2SO 4 was 20、gm2.Furthermore, the effects of compound fertilizers of nitrogen and phosphorus(N 20%, P 2O 5 20%) on nutrient concentration weren't significant.

关 键 词：红松 落叶松 幼苗 器官 养分含量 施肥 养分分配 产量 

分 类 号：S791.22[农业科学—林木遗传育种] S791.247[农业科学—林学]