Effects of Seedling Containers Made of Camphor Tree Processing Residues on Cucumber Seedling Growth and Physiological Characteristics

doi:10.11924/j.issn.1000-6850.casb2021-0885

Abstract

Abstract:

To determine the effects of seedling containers made of processing residues of camphor trees on the growth and physiological characteristics of cucumber seedlings, in this study, we analyzed the physical and chemical characteristics, and biodegradable properties of three kinds of containers (SCs) made of different raw materials [processing residues without essential oil extraction (TF-A), processing residues after extracting essential oil (TF-B) and 1:1 blending materials (TF-C)], and measured the containers’ water absorption characteristics’ change and nutrient release regularity. Moreover, we investigated the effects of these SCs on cucumber seed germination, and on the growth physiological indexes and morphology of cucumber seedlings. The results showed that, before reaching adsorption equilibrium, the water absorption rate and swelling rate of water absorption thickness were linearly correlated with the soaking time (R²>0.8521), and the hydrophobicity of the seedling container TF-A was the largest, followed by TF-C and then TF-B. During the culturing period, the total nitrogen release rate in the three kinds of containers was up to 50.23%, the total phosphorus release rate was slightly lower than the rate of total potassium, and the organic carbon mineralization rate had no significant change. The germination potential of the seedlings in TF-B reached 74.81%, and the highest germination rate was 94%, with no significant difference from those in plastic containers (CK). Comparing the seedlings cultivated in TF-C with those in CK, the stem base width, chlorophyll, aboveground fresh weight, underground fresh weight, aboveground dry weight and underground dry weight were increased by 4.59%, 12.18%, 3.01%, 6.80%, 2.86% and 15.79%, respectively, and the seedling index was increased by 23.64%. In general, cucumber seedlings cultivated in containers made of camphor tress processing residues showed good seedling growth characteristics, and had no significant difference from those cultivated in plastic containers. The results indicate that the utilization of camphor tree processing residues as the substrate container has a good application potential in making seedling beds, and the study could expand the utilization way of camphor tree processing residues.

Key words: residues of camphor tree processing, seedling container, cucumber, growth, seedling cultivating

CLC Number:

X712

HE Lei, SUN Enhui, DENG Tao, YONG Cheng, FAN Xiaodong, HUANG Hongying. Effects of Seedling Containers Made of Camphor Tree Processing Residues on Cucumber Seedling Growth and Physiological Characteristics[J]. Chinese Agricultural Science Bulletin, 2022, 38(25): 38-46.

Figures/Tables 8

References 38

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理化指标		TF-A	TF-B	TF-C
pH		5.91±0.23	5.74±0.34	5.78±0.28
EC/(mS/cm)		0.93±0.12	0.85±0.13	0.89±0.08
总氮/(g/kg)		6.95±0.12	6.59±0.18	6.72±0.19
总磷/(g/kg)		0.94±0.01	0.97±0.01	0.95±0.01
总钾/(g/kg)		1.29±0.02	1.32±0.03	1.33±0.02
有机碳/(g/kg)		45.76±0.81	42.84±0.69	41.84±0.47
原材料纤维颗粒分布占比/%	<10目	45±1.51	40.16±1.71	43.18±1.48
	10~20目	23.5±0.84	24.32±1.30	23.51±0.76
	20~40目	23.7±1.08	25.14±0.78	24.22±1.12
	40~60目	6.2±0.36	6.9±0.61	6.65±0.74
	>60目	1.6±0.02	3.48±0.13	2.54±0.08

理化指标		TF-A	TF-B	TF-C
pH		5.91±0.23	5.74±0.34	5.78±0.28
EC/(mS/cm)		0.93±0.12	0.85±0.13	0.89±0.08
总氮/(g/kg)		6.95±0.12	6.59±0.18	6.72±0.19
总磷/(g/kg)		0.94±0.01	0.97±0.01	0.95±0.01
总钾/(g/kg)		1.29±0.02	1.32±0.03	1.33±0.02
有机碳/(g/kg)		45.76±0.81	42.84±0.69	41.84±0.47
原材料纤维颗粒分布占比/%	<10目	45±1.51	40.16±1.71	43.18±1.48
	10~20目	23.5±0.84	24.32±1.30	23.51±0.76
	20~40目	23.7±1.08	25.14±0.78	24.22±1.12
	40~60目	6.2±0.36	6.9±0.61	6.65±0.74
	>60目	1.6±0.02	3.48±0.13	2.54±0.08

样品	株高/cm	茎基宽/mm	SPAD值	鲜质量/g		干质量/g		壮苗指数
样品	株高/cm	茎基宽/mm	SPAD值	地上	地下	地上	地下	壮苗指数
塑料容器	19.31a	5.01a	20.36b	7.3a	1.47a	0.7ab	0.19b	0.02310
TF-A	18.02ab	4.83b	19.32c	7.12a	1.36c	0.69b	0.18b	0.02332
TF-B	15.29c	4.52c	21.53a	6.47b	1.39b	0.66b	0.23a	0.02573
TF-C	16.59b	5.24a	22.84a	7.52a	1.57a	0.72ab	0.22a	0.02856

样品	株高/cm	茎基宽/mm	SPAD值	鲜质量/g		干质量/g		壮苗指数
样品	株高/cm	茎基宽/mm	SPAD值	地上	地下	地上	地下	壮苗指数
塑料容器	19.31a	5.01a	20.36b	7.3a	1.47a	0.7ab	0.19b	0.02310
TF-A	18.02ab	4.83b	19.32c	7.12a	1.36c	0.69b	0.18b	0.02332
TF-B	15.29c	4.52c	21.53a	6.47b	1.39b	0.66b	0.23a	0.02573
TF-C	16.59b	5.24a	22.84a	7.52a	1.57a	0.72ab	0.22a	0.02856