Effects of seaweed fertilizer on nutrient uptake and transport in loquat seedlings

doi:10.16178/j.issn.0528-9017.20230520

Abstract

Abstract:

To explore the effect of seaweed fertilizer on nutrient uptake and transport in loquat seedlings, this study investigated the effects of different dilution ratios of seaweed fertilizer on nitrogen, phosphorus and potassium uptake and transport. The biomass, total N, total P and total K contents in the roots, stems, leaves and aboveground parts of loquat seedlings were increased by spraying different concentrations of seaweed fertilizer,and the contents of them first increased and then decreased with increasing seaweed fertilizer dilution ratio.The application of seaweed fertilizer improved the uptake, transfer volume, transfer efficiency and transfer contribution rate for N, P and K in each part of the loquat seedlings and the 650 times diluted seaweed fertilizer showed optimal results.Furthermore, different concentrations of seaweed fertilizers increased N harvest index in the aboveground parts of loquat seedlings and P harvest index in the roots of loquat seedlings. In addition, soil alkali-hydrolysed N,available P and available K contents increased and soil pH value decreased after spraying seaweed fertilizer.Correlation analysis revealed significantly positive correlations between loquat seedlings biomass and total N, P and K contents with soil alkali-hydrolysed N, available P and available K contents.The uptake and transport of N, P and K in loquat seedlings were enhanced by spraying seaweed fertilizer, the optimum concentration being 650 times dilution.

Key words: seaweed fertilizer, loquat seedlings, nutrient uptake and transport

CLC Number:

S158.3

CHEN Mingmin, HUANG Yong, MA Qiaoli, XU Yaxin, LIN Lijin, ZHANG Huifen, XIE Jing, DENG Qunxian. Effects of seaweed fertilizer on nutrient uptake and transport in loquat seedlings[J]. Journal of Zhejiang Agricultural Sciences, 2024, 65(3): 600-607.

Figures/Tables 6

References 45

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海藻肥稀释倍数	单株生物量/g				根冠比
海藻肥稀释倍数	根系	茎秆	叶片	地上部分	根冠比
0	0.48±0.02 c	0.76±0.03 c	0.85±0.06 c	1.61±0.07 d	0.57±0.05 ab
450	0.56±0.03 b	0.89±0.07 b	0.94±0.07 c	1.83±0.13 c	0.60±0.03 a
650	0.65±0.04 a	1.06±0.07 a	1.29±0.05 a	2.36±0.12 a	0.51±0.04 b
850	0.64±0.03 a	0.90±0.04 b	1.16±0.04 b	2.06±0.07 b	0.55±0.01 ab
1 050	0.59±0.03 ab	0.89±0.04 b	0.94±0.07 c	1.83±0.08 c	0.63±0.07 a

海藻肥稀释倍数	单株生物量/g				根冠比
海藻肥稀释倍数	根系	茎秆	叶片	地上部分	根冠比
0	0.48±0.02 c	0.76±0.03 c	0.85±0.06 c	1.61±0.07 d	0.57±0.05 ab
450	0.56±0.03 b	0.89±0.07 b	0.94±0.07 c	1.83±0.13 c	0.60±0.03 a
650	0.65±0.04 a	1.06±0.07 a	1.29±0.05 a	2.36±0.12 a	0.51±0.04 b
850	0.64±0.03 a	0.90±0.04 b	1.16±0.04 b	2.06±0.07 b	0.55±0.01 ab
1 050	0.59±0.03 ab	0.89±0.04 b	0.94±0.07 c	1.83±0.08 c	0.63±0.07 a

组织	海藻肥稀释倍数	全氮含量/ (mg·g^-1)	单株氮吸收量/mg	单株氮转运量/mg	氮转运效率/%	氮转运贡献率/%	氮收获指数/%
根系	0	5.59±0.06 d	2.67±0.16 d	0.52±0.14 d	23.95±6.27 d	19.18±4.02 d	21.01±0.41 ab
	450	6.11±0.37 d	3.41±0.20 c	1.26±0.18 c	58.28±8.02 c	36.71±3.15 c	18.62±0.25 bc
	650	8.55±0.28 a	5.57±0.48 a	3.41±0.46 a	158.31±19.32 a	61.14±3.02 a	16.58±1.61 c
	850	7.83±0.35 b	4.99±0.41 a	2.84±0.38 a	131.70±15.89 a	56.71±2.88 a	19.17±1.14 b
	1 050	7.01±0.33 c	4.14±0.37 b	1.98±0.39 b	92.06±18.71 b	47.59±5.32 b	22.55±2.08 a
茎秆	0	3.74±0.14 d	2.85±0.20 d	0.34±0.14 d	13.68±5.32 d	11.90±4.21 d	22.47±2.44 bc
	450	6.05±0.15 b	5.39±0.27 b	2.89±0.37 b	115.79±18.60 b	53.42±4.19 b	29.44±0.41 a
	650	7.69±0.20 a	8.17±0.30 a	5.66±0.32 a	226.49±16.90 a	69.32±1.57 a	24.29±0.03 b
	850	6.24±0.32 b	5.63±0.38 b	3.13±0.40 b	125.33±18.17 b	55.43±3.46 b	21.66±1.55 bc
	1 050	4.33±0.26 c	3.85±0.14 c	1.35±0.10 c	53.85±4.54 c	34.96±1.89 c	21.01±1.23 c
叶片	0	8.51±0.75 d	7.19±0.55 d	0.75±0.53 d	11.58±8.14 d	10.06±6.64 d	56.52±2.09 a
	450	10.13±0.44 c	9.51±0.36 c	3.07±0.35 c	47.62±5.69 c	32.19±2.67 c	51.94±0.53 b
	650	15.39±0.55 a	19.88±1.10 a	13.44±1.20 a	208.94±22.23 a	67.52±2.38 a	59.13±1.63 a
	850	13.34±1.07 b	15.41±1.02 b	8.97±0.98 b	139.24±14.84 b	58.09±2.64 b	59.17±2.53 a
	1 050	11.02±0.15 c	10.36±0.74 c	3.91±0.86 c	60.98±14.68 c	37.54±5.57 c	56.44±3.04 a
地上部分	0	6.25±0.36 d	10.03±0.35 d	1.09±0.44 d	12.23±4.98 d	10.78±4.03 d	78.99±0.41 bc
	450	8.14±0.27 c	14.90±0.62 c	5.95±0.72 c	66.64±8.90 c	39.87±3.30 c	81.38±0.25 ab
	650	11.91±0.28 a	28.04±1.37 a	19.10±1.45 a	213.75±19.08 a	68.05±1.93 ab	83.42±1.61 a
	850	10.23±0.65 b	21.04±0.89 b	12.10±1.00 b	135.42±13.17 b	57.43±2.46 a	80.83±1.14 b
	1 050	7.76±0.11 c	14.21±0.60 c	5.26±0.79 cd	58.97±10.09 b	36.93±3.99 c	77.45±2.08 c

组织	海藻肥稀释倍数	全氮含量/ (mg·g^-1)	单株氮吸收量/mg	单株氮转运量/mg	氮转运效率/%	氮转运贡献率/%	氮收获指数/%
根系	0	5.59±0.06 d	2.67±0.16 d	0.52±0.14 d	23.95±6.27 d	19.18±4.02 d	21.01±0.41 ab
	450	6.11±0.37 d	3.41±0.20 c	1.26±0.18 c	58.28±8.02 c	36.71±3.15 c	18.62±0.25 bc
	650	8.55±0.28 a	5.57±0.48 a	3.41±0.46 a	158.31±19.32 a	61.14±3.02 a	16.58±1.61 c
	850	7.83±0.35 b	4.99±0.41 a	2.84±0.38 a	131.70±15.89 a	56.71±2.88 a	19.17±1.14 b
	1 050	7.01±0.33 c	4.14±0.37 b	1.98±0.39 b	92.06±18.71 b	47.59±5.32 b	22.55±2.08 a
茎秆	0	3.74±0.14 d	2.85±0.20 d	0.34±0.14 d	13.68±5.32 d	11.90±4.21 d	22.47±2.44 bc
	450	6.05±0.15 b	5.39±0.27 b	2.89±0.37 b	115.79±18.60 b	53.42±4.19 b	29.44±0.41 a
	650	7.69±0.20 a	8.17±0.30 a	5.66±0.32 a	226.49±16.90 a	69.32±1.57 a	24.29±0.03 b
	850	6.24±0.32 b	5.63±0.38 b	3.13±0.40 b	125.33±18.17 b	55.43±3.46 b	21.66±1.55 bc
	1 050	4.33±0.26 c	3.85±0.14 c	1.35±0.10 c	53.85±4.54 c	34.96±1.89 c	21.01±1.23 c
叶片	0	8.51±0.75 d	7.19±0.55 d	0.75±0.53 d	11.58±8.14 d	10.06±6.64 d	56.52±2.09 a
	450	10.13±0.44 c	9.51±0.36 c	3.07±0.35 c	47.62±5.69 c	32.19±2.67 c	51.94±0.53 b
	650	15.39±0.55 a	19.88±1.10 a	13.44±1.20 a	208.94±22.23 a	67.52±2.38 a	59.13±1.63 a
	850	13.34±1.07 b	15.41±1.02 b	8.97±0.98 b	139.24±14.84 b	58.09±2.64 b	59.17±2.53 a
	1 050	11.02±0.15 c	10.36±0.74 c	3.91±0.86 c	60.98±14.68 c	37.54±5.57 c	56.44±3.04 a
地上部分	0	6.25±0.36 d	10.03±0.35 d	1.09±0.44 d	12.23±4.98 d	10.78±4.03 d	78.99±0.41 bc
	450	8.14±0.27 c	14.90±0.62 c	5.95±0.72 c	66.64±8.90 c	39.87±3.30 c	81.38±0.25 ab
	650	11.91±0.28 a	28.04±1.37 a	19.10±1.45 a	213.75±19.08 a	68.05±1.93 ab	83.42±1.61 a
	850	10.23±0.65 b	21.04±0.89 b	12.10±1.00 b	135.42±13.17 b	57.43±2.46 a	80.83±1.14 b
	1 050	7.76±0.11 c	14.21±0.60 c	5.26±0.79 cd	58.97±10.09 b	36.93±3.99 c	77.45±2.08 c

组织	海藻肥稀释倍数	全磷含量/ (mg·g^-1)	单株磷吸收量/mg	单株磷转运量/mg	磷转运效率/%	磷转运贡献率/%	磷收获指数/%
根系	0	1.77±0.08 d	0.84±0.01 d	0.33±0.03 d	63.59±9.92 d	38.72±3.67 d	16.47±0.99 b
	450	2.22±0.06 c	1.24±0.07 c	0.72±0.07 c	141.00±21.32 c	58.30±3.54 c	19.23±0.85 ab
	650	2.91±0.10 a	1.89±0.09 a	1.38±0.09 a	268.20±30.80 a	72.20±2.18 a	17.81±0.64 ab
	850	2.53±0.09 b	1.61±0.14 b	1.09±0.10 b	211.89±4.85 b	67.93±0.50 ab	18.96±1.38 ab
	1 050	2.45±0.13 b	1.45±0.13 b	0.93±0.17 b	182.20±45.85 bc	63.96±5.69 bc	20.44±2.35 a
茎秆	0	2.78±0.09 c	2.11±0.10 c	0.68±0.07 c	47.86±6.23 c	32.29±2.84 c	41.27±1.36 a
	450	2.81±0.12 c	2.51±0.28 b	1.08±0.35 b	76.64±28.87 bc	42.40±9.14 b	38.82±1.30 ab
	650	3.83±0.09 a	4.07±0.16 a	2.64±0.14 a	185.14±13.72 a	64.87±1.73 a	38.29±0.83 b
	850	3.14±0.12 b	2.83±0.02 b	1.40±0.06 b	98.47±9.14 b	49.54±2.32 b	33.37±0.56 c
	1 050	3.03±0.08 b	2.70±0.18 b	1.27±0.12 b	88.64±6.72 b	46.94±1.85 b	38.06±1.96 b
叶片	0	2.56±0.07 d	2.17±0.19 d	0.63±0.13 d	41.03±8.37 b	28.93±4.22 c	42.26±2.01 b
	450	2.88±0.05 c	2.71±0.22 c	1.17±0.32 c	77.63±26.11 b	42.82±8.99 b	41.95±0.51 b
	650	3.61±0.06 a	4.67±0.15 a	3.13±0.29 a	205.77±38.26 a	66.97±3.97 a	43.90±0.20 b
	850	3.50±0.14 a	4.05±0.10 b	2.51±0.20 b	164.72±27.41 a	61.95±3.98 a	47.67±1.30 a
	1 050	3.13±0.13 b	2.94±0.17 c	1.40±0.31 c	92.99±29.27 b	47.43±7.50 b	41.50±1.50 b
地上部分	0	2.66±0.07 d	4.28±0.25 d	1.31±0.18 c	44.27±6.51 c	30.59±3.06 c	83.53±0.99 a
	450	2.85±0.08 d	5.22±0.49 c	2.25±0.62 bc	76.78±24.20 bc	42.67±8.40 ab	80.77±0.85 ab
	650	3.71±0.07 a	8.74±0.29 a	5.77±0.43 a	195.44±25.11 a	65.99±2.86 a	82.19±0.64 ab
	850	3.34±0.13 b	6.88±0.08 b	3.91±0.25 ab	132.45±15.87 ab	56.84±3.05 ab	81.04±1.38 ab
	1 050	3.08±0.10 c	5.64±0.30 c	2.67±0.40 bc	90.60±17.88 bc	47.24±4.73 ab	79.56±2.35 b