Responses of growth and afforestation performance of Pinus tabuliformis container and bareroot seedlings to fall fertilization

doi:10.12302/j.issn.1000-2006.202105015

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2023, Vol. 47 ›› Issue (1): 136-144.doi: 10.12302/j.issn.1000-2006.202105015

• Original article • Previous Articles Next Articles

Responses of growth and afforestation performance of Pinus tabuliformis container and bareroot seedlings to fall fertilization

YE Keke¹(), LI Qingmei¹, ZHU Yan¹^,^*(), YAN Jingjing¹, ZHANG Zihan¹, FENG Sai¹, YANG Xiaohui²

1. State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
2. People’s Government of Huangtuliangzi Town, Pingquan City, Hebei Province, Chengde 067506, China

Received:2021-05-10 Accepted:2021-12-17 Online:2023-01-30 Published:2023-02-01
Contact: ZHU Yan E-mail:2276350394@qq.com;zhuyanzi522@163.com

Abstract

Abstract:

【Objective】 The aims of this research were to examine the responses of container and bareroot Pinus tabuliformis seedlings to nursery fall fertilization supplements and assess their subsequent two-year field performance. This study was conducted to provide a theoretical basis and technical support for the cultivation of high-quality P. tabuliformis seedlings. 【Method】 Fall fertilization was applied when the terminal bud ratio reached 90% of the total seedlings. P. tabuliformis container seedlings and bareroot seedlings were supplied with fertigation (i.e., irrigation with soluble fertilizer) at 0 (control), 12, 24, and 36 mg/plant. The effects of fall fertilization on growth and afforestation performance were then tracked and analyzed over two-year using the following cirteria seedling height, root-collar diameter(RCD) and nutrient content, etc. 【Result】 The height, RCD, biomass, N content, P content and K content of container seedlings with 24 mg/plant were higher than those of the other doses. In addition, the total biomass, N content, P content and K content were significantly increased by 41.8%, 31.4%, 65.6% and 48.8%, respectively, compared to those of the control seedlings, whereas the bareroot seedlings were less affected by fall fertilization. The distribution of N content in the organs of container seedlings was root > needle > stem, whereas that in the bareroot seedlings was needle>root>stem. The distribution of P and K contents in the organs of container and bareroot seedlings exhibited the same order: needle>root>stem. The results of the rainy season afforestation test showed that the rate of afforestration was significantly affected by the seedling type. Compared with the bareroot seedlings, the relative growth in the height and RCD of container seedlings were significantly higher in the first year of outplanting and the following spring, and the survival rate of container seedlings in the following spring was similar to the pattern observed for the relative RCD. The relative growth in height in the second year spring was significantly affected by fall fertilization, and fall fertilization at 24 mg/plant yielded the highest value. The afforestation survival rate, relative growth of height, and RCD of seedlings were closely related to seedling root biomass, root shoot ratio, root N content, root P content, root K content and stem P content in the initial stage of afforestation. 【Conclusion】 Fall fertilization at 24 mg/plant was best for optimizing the morphological growth and nutrient accumulation of P. tabuliformis container seedlings. The survival rate and growth of 1-year-old P. tabuliformis container seedlings were significantly greater than those of the bareroot seedlings.

Key words: fall fertilization, Pinus tabuliformis, stock type, nutrient storage, afforestation performance

CLC Number:

S723

YE Keke, LI Qingmei, ZHU Yan, YAN Jingjing, ZHANG Zihan, FENG Sai, YANG Xiaohui. Responses of growth and afforestation performance of Pinus tabuliformis container and bareroot seedlings to fall fertilization[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2023, 47(1): 136-144.

Figures/Tables 7

Table 1

Table 2

Fig.1

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Table 3

Table 4

References 35

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土层深度/cm soil layer depth	颗粒物组成/% soil particle composition			含量 content					pH
土层深度/cm soil layer depth	砂粒 sand	粉粒 powder	黏粒 clay	有机质/ (g·kg^-1) organic matter	全氮/ (g·kg^-1) total N	碱解氮/ (mg·kg^-1) alkali- hydrolyzable N	有效磷/ (mg·kg^-1) available P	速效钾/ (mg·kg^-1) available K	pH
0~15	79.04	10.67	10.29	12.44	1.09	15.16	4.13	71.88	8.11
≥15~30	80.38	9.00	10.62	9.97	0.93	11.20	2.06	48.73	8.28
≥30~45	81.71	8.67	9.62	9.05	0.91	11.02	5.97	49.74	8.31
容器苗土壤 container seedling soil	76.71	11.67	11.63	10.02	1.09	20.42	5.23	73.89	8.03

施肥量/ (mg·株^-1) fertilizer addition	苗高/cm height		地径/mm root-collar diameter
施肥量/ (mg·株^-1) fertilizer addition	R	L	R	L
0	8.63±0.64 a	9.50±1.01 a	3.13±0.08 a	3.34±0.28 a
12	8.90±0.81 a	9.20±1.00 a	3.09±0.11 a	3.32±0.17 a
24	9.87±0.43 a	10.03±0.72 a	3.24±0.07 a	3.45±0.21 a
36	6.73±0.27 b	10.57±1.73 a	3.06±0.15 a	3.22±0.08 a

差异来源 sources of variation	水平 level	成活率/% survival rate		苗高相对生长量/% relative growth of height		地径相对生长量/% relative growth of root-collar diameter
差异来源 sources of variation	水平 level	T1	T2	T1	T2	T1	T2
苗木类型 seedling type	R	96.18±2.13 a	89.91±2.41 a	10.32±1.48 a	40.04±3.20 a	24.18±1.51 a	39.55±2.85 a
	L	85.83±4.68 a	65.00±7.33 b	4.75±0.85 b	16.66±1.91 b	16.22±1.41 b	29.36±2.63 b
	P	0.051	0.005	0.002	<0.001	0.003	0.026
施肥量 fertilizer addition	0	84.82±6.68 a	65.88±10.59 a	8.45±1.93 a	27.97±6.05 ab	20.45±2.78 a	33.10±4.37 a
	12	87.96±6.64 a	77.55±9.70 a	8.79±2.65 a	32.84±7.76 a	20.90±2.17 a	37.32±4.15 a
	24	100.00±0 a	88.33±9.80 a	7.81±2.29 a	32.54±6.11 a	21.46±3.04 a	37.49±5.44 a
	36	91.25±4.82 a	78.06±5.78 a	5.09±1.17 a	20.07±3.87 b	17.98±2.89 a	29.91±3.60 a
	P	0.192	0.259	0.314	0.049	0.728	0.527
苗木类型×施肥量 seedling type × fertilizer addition	P	0.450	0.485	0.055	0.523	0.971	0.834

相关性状 correlation factor	造林效果afforestation performance
	成活率 survival rate		苗高相对生长量 relative growth of height		地径相对生长量 relative growth of root-collar diameter
	T1	T2	T1	T2	T1	T2
苗高height	0.171	0.015	-0.004	-0.176	-0.174	-0.094
地径root-collar diameter	0.147	0.157	-0.367	-0.252	-0.460^*	-0.142
根生物量root biomass	0.469^*	0.566^**	0.341	0.548^**	0.323	0.459^*
茎生物量stem biomass	0.015	-0.108	-0.140	-0.244	-0.294	-0.035
叶生物量needle biomass	-0.042	-0.268	-0.235	-0.399	-0.397	-0.175
根冠比root shoot ratio	0.345	0.489^*	0.187	0.474^*	0.396	0.271
根氮含量root N content	0.447^*	0.497^*	0.246	0.528^**	0.246	0.385
茎氮含量stem N content	0.257	0.285	0.197	0.188	0.096	0.236
叶氮含量needle N content	-0.103	-0.305	-0.160	-0.262	-0.335	-0.082
根磷含量root P content	0.460^*	0.500^*	0.111	0.416^*	0.234	0.293
茎磷含量stem P content	0.435^*	0.344	0.410^*	0.517^**	0.342	0.392
叶磷含量needle P content	-0.127	-0.253	-0.202	-0.379	-0.421^*	-0.147
根钾含量root K content	0.511^*	0.586^**	0.325	0.577^**	0.405^*	0.470^*
茎钾含量stem K content	-0.150	-0.210	-0.221	-0.232	-0.330	-0.124
叶钾含量needle K content	0.048	-0.134	-0.166	-0.310	-0.363	-0.124

Responses of growth and afforestation performance of Pinus tabuliformis container and bareroot seedlings to fall fertilization

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[1]	ZHAO Ya’nan, SUN Tianhua, WANG Lifeng, XU Qiang, LIU Junxia, GAO Baojia, ZHOU Guona. Plant hormones and metabolites response to feeding stimulation by pine caterpillar (Dendrolimus tabulaeformis) and leaf clipping control in Chinese pine (Pinus tabuliformis) [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2024, 48(1): 219-226.
[2]	LIU Bo, YU Yan-feng, ZHANG Yun-qi, XU Xiao-niu*. Fine-root biomass and related nutrients in different aged stands of subtropical evergreen broad-leaved forest [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2008, 32(05): 81-84.