| 摘要: |
| 【目的】研究缓释肥用量对江南油杉幼苗生长、根系发育以及养分状况的影响，为江南油杉优质苗木繁育提供依据。【方法】以1年生江南油杉容器苗为材料，采用单因素随机区组设计方法，设置7个缓释肥用量处理：即对照(0 kg/m3，CK)、M1(1.0 kg/m3)、M2(2.0 kg/m3)、M3(3.0 kg/m3)、M4(4.0 kg/m3)、M5(6.0 kg/m3)和M6(9.0 kg/m3)，分析各处理江南油杉生长发育指标以及植株N、P、K 养分含量。【结果】(1) 与对照相比，施用缓释肥的江南油杉地径、苗高显著增加，叶、茎、根及全株生物量明显提高，且均以M3(3.0 kg/m3)处理幼苗生长效果最佳。(2) 施用缓释肥处理的江南油杉平均根直径、根表面积、根体积以及各根径等级的细根长度增幅明显，均高于对照，且M3处理幼苗根系更为发达。(3) 随着缓释肥用量的增加，江南油杉叶、茎、根的N、P和K含量均呈现先增加后下降趋势，M3处理植株N、P和K含量整体较高。(4) 江南油杉容器苗生长、生物量与缓释肥用量的二次项方程拟合效果最优，R2均大于0.950，最佳缓释肥用量为2.75~3.28 kg/m3，与M3处理生长最优的实测结果相吻合。【结论】适量缓释肥能促进江南油杉幼苗生长、生物量积累和根系发育，建议缓释肥用量以3.0 kg/m3为宜。 |
| 关键词: 江南油杉 容器苗 苗木繁殖 缓释肥 |
| DOI： |
| 分类号: |
| 基金项目:国家林木种质资源共享服务平台项目(2005DKA21003)；中国林业科学研究院热带林业实验中心科学基金项目(RL2015-05) |
|
| Effects of slow release fertilizer on growth of Keteleeria fortunei seedlings cultured in container |
|
ZHANG Pei,PANG Shengjiang,LIU Shiling,et al
|
| Abstract: |
| 【Objective】This study investigated effects of slow-release fertilizers on growth,root development and nutrient contents of Keteleeria fortunei seedlings cultured in container to provide basis for the breeding of K.fortunei seedlings with high quality.【Method】One-year-old container seedlings of K.fortunei were treated with 7 slow release fertilizer treatments of CK,M1，M2，M3，M4，M5 and M6 with dosages of 0,1.0,2.0,3.0,4.0,6.0 and 9.0 kg/m3,respectively.The growth and development indexes as well as N,P and K contents were then analyzed.【Result】(1) Compared with the control,the growth of height and ground diameter of K.fortunei seedlings was significantly increased by slow release fertilizer,and the biomass of leaf,stem,root and whole plant of K.fortunei seedlings was increased by slow release fertilizer.And the seedling growth was best in M3 (3.0 kg/m3).(2) The average root diameter,root surface area,root volume,and fine root length of each root diameter grade in slow release fertilizer treatments were increased significantly with the best root system in M3.(3) With the increase of slow-release fertilizer dosage,contents of N,P and K in leaves,stems and roots showed a trend of increasing before decreasing.The M3 treatment had the highest values in plants.(4) Quadratic equations were the best in fitting seedling growth,biomass and slow release fertilizer dosage with R2 of greater than 0.950.The obtained optimal slow-release fertilizer dosage of 2.75－3.28 kg/m3 was consistent with measured results of M3 treatment.【Conclusion】Appropriate amount of slow-release fertilizer could promote growth,biomass accumulation and root development of K. fortunei seedlings and the recommended amount was 3.0 kg/m3. |
| Key words: Keteleeria fortune container seedling seedling breeding slow release fertilizer |
