缓释肥N/P比及加载量对5种珍贵树种1年生苗生长和养分库构建的影响

李峰卿, 王秀花, 楚秀丽, 张东北, 吴小林, 周生财, 叶明

南京林业大学学报(自然科学版) ›› 2020, Vol. 44 ›› Issue (1) : 72-80.

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南京林业大学学报(自然科学版) ›› 2020, Vol. 44 ›› Issue (1) : 72-80. DOI: 10.3969/j.issn.1000-2006.201902007
研究论文

缓释肥N/P比及加载量对5种珍贵树种1年生苗生长和养分库构建的影响

作者信息 +

Effects of N/P ratio and loading on growth and construction of nutrients reserves of one-year-old seedlings for five kinds of precious tree species

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文章历史 +

摘要

【目的】 揭示不同缓释肥N与P2O5质量比(N/P比)及加载量对浙江楠等5种珍贵树种1年生容器苗生长、N与P素吸收利用及养分库构建的影响,以期为精细化培育珍贵树种容器苗提供科学指导。【方法】 采用4×4两因素析因设计,研究N/P比和加载量对浙江楠等5种珍贵树种1年生容器苗生长发育及N、P库构建的影响。【结果】 缓释肥N/P比、加载量对5树种1年生容器苗生长和干物质积累均有显著或极显著影响。随着N/P比提高,各树种的反应却不一致;当缓释肥加载量为F3(3.5 kg/m3)时, 5树种生长指标和干物质积累均达到最大值。浙江楠、浙江樟和木荷的叶N含量与缓释肥N/P比密切相关,但南方红豆杉和赤皮青冈叶N含量在各N/P比间差异不显著。除浙江楠外,其他4树种的叶P含量在不同N/P比下差异显著,但各树种叶N和P累积量却对N/P比响应均不敏感。较之于N/P比,缓释肥加载量对5种珍贵树种1年生容器苗N、P库构建的影响更明显,叶N、P含量及累积量均在较高的缓释肥加载量F3下达到最高。N、P含量在各树种器官内的变化规律基本一致,说明N、P吸收同步,但不同树种间N、P素在各器官的分配却不同。【结论】 浙江楠容器苗生长及其养分库构建均需高N缓释肥,浙江樟、赤皮青冈和木荷则需要相对高P缓释肥,而南方红豆杉容器苗生长对N/P比要求不严格,但其养分库构建需高N缓释肥;在考虑N/P比的同时,适量(3.5 kg/m3)增施缓释肥,可提高珍贵树种的容器苗质量。

Abstract

【Objective】 To provide scientific guidance for seedling cultivation in containers, the impacts of slow-release fertilizer (SRF) loading were observed for the growth, nitrogen (N) and phosphorus (P) uptake, and nutrient pool construction of five precious tree species, such as Phoebe chekiangensis. 【Method】 A 4 × 4 factorial experimental design was used to compare the impacts of the N/P mass ratio (1.75:1, 2.25:1, 2.75:1 and 3.25:1) and SRF loading levels (1.5, 2.5, 3.5 and 4.5 kg/m 3) on the growth and N and P nutrient pool construction of one-year-old seedlings.【Result】 Significant effects were detected in the growth and dry matter accumulation between N/P ratios, SRF loading, and their interaction. As the N/P ratio increased, the tree species responded differently. The largest growth and dry matter accumulation of the five precious tree species was detected with 3.5 kg/m3 SRF loading. The N concentration in the leaves of P. chekiangensis, Cinnamomum chekiangense and Schima superba was correlated with the N/P ratio, but there was no difference in the leaf N concentration of Taxus wallichiana and Cyclobalan gilvain. The P concentration in the leaves of all species, except for P. chekiangensis, also significantly differed with varying N/P ratios. However, the N and P accumulation in the leaves of all species were not sensitive to the N/P ratio. The effect of the SRF loading on the nutrient accumulations was more obvious than the N/P ratios; the concentration and accumulation of leaf N and P were highest with 3.5 kg/m3 SRF loading. Changes in the N and P concentrations in the organs of the different species were similar, indicating N/P absorption synchrony, whilst the distribution of N and P among the organs was species-specific. 【Conclusion】 Based on the growth characteristics of the different tree species, seedlings of P. chekiangensis should be loaded with higher N content fertilizer, and the seedlings of Cinnamomum chekiangense, Cyclobalan gilva and S. superba should be loaded with higher P content fertilizer. T. wallichiana seedlings are not sensitive to the N/P ratio, but nutrition construction suggests that it is N/P ratio and adding appropriate amounts of SRF (3.5 kg/m3).

关键词

浙江楠 / 浙江樟 / 南方红豆杉 / 赤皮青冈 / 木荷 / 容器苗 / N/P比 / 缓释肥加载 / 养分库

Key words

Phoebe chekiangensis / Cinnamomum chekiangense / Taxus wallichiana var. mairei / Cyclobalanopsis gilva / Schima superba / container seedling / N/P ratio / slow-release fertilizer loading / nutrient pool

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李峰卿, 王秀花, 楚秀丽, . 缓释肥N/P比及加载量对5种珍贵树种1年生苗生长和养分库构建的影响[J]. 南京林业大学学报(自然科学版). 2020, 44(1): 72-80 https://doi.org/10.3969/j.issn.1000-2006.201902007
LI Fengqing, WANG Xiuhua, CHU Xiuli, et al. Effects of N/P ratio and loading on growth and construction of nutrients reserves of one-year-old seedlings for five kinds of precious tree species[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2020, 44(1): 72-80 https://doi.org/10.3969/j.issn.1000-2006.201902007
中图分类号: S722   

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基金

浙江省省院合作林业科技项目(2017SY19)
浙江省省院合作林业科技项目(2016SY03)

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