研究施肥对降香黄檀(Dalbergia odorifera T。Chen。)营养生长和生殖生长的影响，为不同经营目标的降香黄檀人工林培育提供技术支撑。本研究以8年生降香黄檀为对象，设置N(185。6 g N/株)、P(120 g P2O5/株)、K(120 g K2O/株)、PK(120 g P2O5+ 120 g K2O/株)、NPK(185。6 g N+120 g P2O5+ 120 g K2O/株)以及不施肥(对照)等六个处理，调查施肥后盛花期内一年生新梢、叶、花的生长情况。结果表明:6个施肥处理间降香黄檀营养生长和生殖生长均差异显著(P＜0。05)。N处理的营养枝率、营养枝复叶数和小叶宽分别比对照提高40。25％、21。75％和9。52％，花序直径和花序生物量则降低12。75％和48。63％，显示N肥能促进降香黄檀营养生长，抑制生殖生长，有利于大径材培育;P、PK处理的营养枝率较对照显著降低47。96％和46。84％，表明P肥和K肥能促进生殖生长，有利于良种选育;NPK处理能同时显著促进营养生长和生殖生长，其营养枝率、营养枝长度、营养枝复叶数、营养枝小叶长、宽和枝生物量比对照提高26。04％、68。16％、32。98％、15。20％、11。40％和83。60％，花序数量和花序生物量亦提高54。20％和49。84％。因此，在降香黄檀人工林培育实践中，可通过调整肥料的NPK配比(偏向N或PK)以实现营养生长或生殖生长调控之目的。
Effects of Fertilization on the Vegetative and Reproductive Growth of Dalbergia odorifera T.Chen.
The experiment was conducted to study the fertilization on vegetative and reproductive growth of Dalbergia odorifera,and then provide useful suggestions for plantation management.The effects of Nitrogen (N,185.6 g N per tree),Phosphorus(P,120 g P2O5 per tree),Potassium(K,120 g K2O per tree) as well as their mixtures(PK,120 g P2O5 mixed with 120 g K2O per tree;NPK,185.6 g N mixed with 120 g P2O5 and 120 g K2O per tree) on leaf growth,branch development,inflorescences set and biomass accumulation of a 8-year-old D.odorifera plantation were studied.There were significant differences on vegetative and reproductive growth of D.odorifera among these treatments (P ＜ 0.05).Nitrogen (N) treatment was helpful for vegetative growth of D.odorifera,and suitable for large-timber forest cultivation,because the ratio of vegetative branch,leaf number and leaflet width of vegetative branches were increased by 40.25％,21.75％ and 9.52％,and the inflorescence diameter and biomass were decreased by 12.75％ and 48.63％,respectively.While P and P mixed with K were more appropriated for breeding purpose,because the ratio of vegetative branch was decreased by 47.96％ and 46.84％,respectively.When N,P and K were mixed together(NPK),the vegetative and reproductive growth were both enhanced significantly (P ＜ 0.05),because the ratio of vegetative branch,length of vegetative branch,leaf number,leaflet length,leaflet width,branch biomass,inflorescence number and inflorescence biomass were increased by 26.04％,68.16％,32.98％,15.20％,11.40％,83.60％,54.20％ and 49.84％,respectively.Thus,the vegetative and reproductive growth of D.odorifera can be regulated though formula fertilization(biased to N or P and K).
国家科技期刊平台
NSTL
万方数据
维普
