Effects of nitrogen management on absorption and allocation of microelements in above-ground parts of dry direct-sowing rice

doi:10.3969/j.issn.1004-1524.20240412

Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (5): 987-997.DOI: 10.3969/j.issn.1004-1524.20240412

• Crop Science • Previous Articles Next Articles

Effects of nitrogen management on absorption and allocation of microelements in above-ground parts of dry direct-sowing rice

LIU Qihua(), SUN Zhaowen, ZHENG Chongke()

Institute of Wetland Agriculture and Ecology, Shandong Academy of Agricultural Sciences, Jinan 250100, China

Received:2024-05-10 Online:2025-05-25 Published:2025-06-11

Abstract

Abstract:

To investigate the effects of nitrogen(N) management on micronutrient absorption and utilization in aboveground parts of dry direct-sowing rice, this study examined how nitrogen application time and application rate influence the absorption-translocation efficiency and partition ratio of four microelements (Fe, Cu, Mn, Zn) in above-ground parts. A split-plot design was adopted with nitrogen application stages as main plots (D1: basal application at sowing followed by topdressing at 3-leaf-1-heart stage, 7 days later, and panicle initiation; D2: initial application at 1-leaf-1-heart stage followed by topdressing at 3-leaf-1-heart stage and panicle initiation; D3: application at 3-leaf-1-heart stage followed by topdressing at panicle initiation) and nitrogen application rate as subplots (F1: 350 kg·hm^-2 pure N; F2: 297.5 kg·hm^-2 pure N; F3: 245 kg·hm^-2 pure N), each treatment had three replicates. The results showed that D2 treatment significantly enhanced Fe and Cu translocation efficiency in leaves compared to D1 and D3 treatments, with Fe efficiency 3.15 and 8.12 percentage points higher, and Cu efficiency 7.64 and 4.57 percentage points higher, respectively. F2 treatment significantly increased Fe and Zn contents in leaves at heading stage compared to F1 and F3. F2 also demonstrated significantly higher Fe, Cu, and Zn translocation efficiency in leaves and leaf sheaths, leading to greater spike partition ratio of these micronutrients. D1F2 combination achieved the highest spike partition ratio for Fe, Mn and Zn. These findings indicated that both nitrogen application time and application rate affect microelements absorption-translocation patterns in dry direct-sowing rice. Delaying initial nitrogen application to 1-leaf-1-heart stage followed by two topdressings enhanced Fe and Cu translocation in leaves. Application rate of 297.5 kg·hm^-2 pure N promoted Fe and Zn accumulation during heading and their subsequent translocation to spikes. The fertilization mode combining basal application at sowing with three subsequent topdressings (297.5 kg·hm^-2 pure N) effectively improves Fe, Mn and Zn distribution rates in spikes at maturity stage.

Key words: nitrogen fertilizer management, dry direct-sowing rice, mineral element, absorption, allocation

CLC Number:

S511

LIU Qihua, SUN Zhaowen, ZHENG Chongke. Effects of nitrogen management on absorption and allocation of microelements in above-ground parts of dry direct-sowing rice[J]. Acta Agriculturae Zhejiangensis, 2025, 37(5): 987-997.

Figures/Tables 9

References 30

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处理 Treatment	铁转运效率 Translocation efficiency of Fe		铜转运效率 Translocation efficiency of Cu		锰转运效率 Translocation efficiency of Mn		锌转运效率 Translocation efficiency of Zn
处理 Treatment	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath
D1F1	71.89 c	52.74 c	78.43 de	55.64 b	38.39 f	42.64 d	77.56 b	48.89 d
D1F2	81.09 a	68.17 a	80.27 cd	44.00 d	49.96 e	42.86 d	86.10 a	71.21 b
D1F3	65.17 d	35.62 ef	76.10 e	20.46 f	22.90 g	46.09 c	70.25 c	76.56 a
D2F1	71.15 c	36.52 e	81.37 bcd	18.35 f	4.09 h	46.07 c	65.27 d	50.49 d
D2F2	75.54 b	37.91 e	83.81 b	49.47 c	56.02 d	21.40 f	55.34 e	37.25 e
D2F3	80.88 a	22.16 g	92.56 a	62.05 a	71.37 b	52.88 b	70.62 c	14.21 g
D3F1	67.75 d	47.87 d	70.04 f	21.33 f	78.02 a	66.62 a	64.01 d	67.56 c
D3F2	81.51 a	63.29 b	91.91 a	44.18 d	64.09 c	62.81 a	87.30 a	70.67 b
D3F3	53.96 e	33.08 f	82.07 bc	26.90 e	36.48 f	35.90 e	64.38 d	30.31 f
D1	72.71 a	52.17 a	78.27 c	40.03 a	37.08 b	43.86 a	77.97 a	65.55 a
D2	75.86 a	32.20 b	85.91 a	43.29 a	43.83 b	40.12 a	63.74 c	33.98 b
D3	67.74 b	48.08 ab	81.34 b	30.81 b	59.53 a	55.11 a	71.90 b	56.18 a
F1	70.26 b	45.71 a	76.61 b	31.77 a	40.17 b	51.78 a	68.95 b	55.65 a
F2	79.38 a	56.45 a	85.33 a	45.88 a	56.69 a	42.36 a	76.25 a	59.71 a
F3	66.67 b	30.29 b	83.58 a	36.47 a	43.58 b	44.96 a	68.42 b	40.36 b

处理 Treatment	铁转运效率 Translocation efficiency of Fe		铜转运效率 Translocation efficiency of Cu		锰转运效率 Translocation efficiency of Mn		锌转运效率 Translocation efficiency of Zn
处理 Treatment	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath
D1F1	71.89 c	52.74 c	78.43 de	55.64 b	38.39 f	42.64 d	77.56 b	48.89 d
D1F2	81.09 a	68.17 a	80.27 cd	44.00 d	49.96 e	42.86 d	86.10 a	71.21 b
D1F3	65.17 d	35.62 ef	76.10 e	20.46 f	22.90 g	46.09 c	70.25 c	76.56 a
D2F1	71.15 c	36.52 e	81.37 bcd	18.35 f	4.09 h	46.07 c	65.27 d	50.49 d
D2F2	75.54 b	37.91 e	83.81 b	49.47 c	56.02 d	21.40 f	55.34 e	37.25 e
D2F3	80.88 a	22.16 g	92.56 a	62.05 a	71.37 b	52.88 b	70.62 c	14.21 g
D3F1	67.75 d	47.87 d	70.04 f	21.33 f	78.02 a	66.62 a	64.01 d	67.56 c
D3F2	81.51 a	63.29 b	91.91 a	44.18 d	64.09 c	62.81 a	87.30 a	70.67 b
D3F3	53.96 e	33.08 f	82.07 bc	26.90 e	36.48 f	35.90 e	64.38 d	30.31 f
D1	72.71 a	52.17 a	78.27 c	40.03 a	37.08 b	43.86 a	77.97 a	65.55 a
D2	75.86 a	32.20 b	85.91 a	43.29 a	43.83 b	40.12 a	63.74 c	33.98 b
D3	67.74 b	48.08 ab	81.34 b	30.81 b	59.53 a	55.11 a	71.90 b	56.18 a
F1	70.26 b	45.71 a	76.61 b	31.77 a	40.17 b	51.78 a	68.95 b	55.65 a
F2	79.38 a	56.45 a	85.33 a	45.88 a	56.69 a	42.36 a	76.25 a	59.71 a
F3	66.67 b	30.29 b	83.58 a	36.47 a	43.58 b	44.96 a	68.42 b	40.36 b

处理 Treatment	F值F value
	铁转运效率 Translocation efficiency of Fe		铜转运效率 Translocation efficiency of Cu		锰转运效率 Translocation efficiency of Mn		锌转运效率 Translocation efficiency of Zn
	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath
D	9.847^**	4.29^*	27.93^**	2.48	24.90^**	1.75	42.78^**	10.69^**
F	24.74^**	8.70^**	40.00^**	2.23	13.62^**	1.28	15.25^**	5.82^*
D×F	14.41^**	0.52	30.01^**	5.33^**	50.85^**	4.53^**	33.98^**	6.14^**

处理 Treatment	F值F value
	铁转运效率 Translocation efficiency of Fe		铜转运效率 Translocation efficiency of Cu		锰转运效率 Translocation efficiency of Mn		锌转运效率 Translocation efficiency of Zn
	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath	叶片Leaf	茎鞘Sheath
D	9.847^**	4.29^*	27.93^**	2.48	24.90^**	1.75	42.78^**	10.69^**
F	24.74^**	8.70^**	40.00^**	2.23	13.62^**	1.28	15.25^**	5.82^*
D×F	14.41^**	0.52	30.01^**	5.33^**	50.85^**	4.53^**	33.98^**	6.14^**

处理 Treatment	铁分配率Fe partition ratio			铜分配率Cu partition ratio			锰分配率Mn partition ratio			锌分配率Zn partition ratio
处理 Treatment	叶片 Leaf	茎鞘 Sheath	穗 Panicle	叶片 Leaf	茎鞘 Sheath	穗 Panicle	叶片 Leaf	茎鞘 Sheath	穗 Panicle	叶片 Leaf	茎鞘 Sheath	穗 Panicle
D1F1	12.15 b	39.14 c	48.71 bc	4.74 e	19.69 f	75.57 a	42.61 bc	34.48 d	22.91 bc	7.75 bc	30.03 a	62.22 bc
D1F2	11.27 b	36.75 c	51.98 a	5.24 d	23.40 e	71.36 b	34.03 d	40.09 c	25.88 a	5.73 c	23.06 bc	71.21 a
D1F3	12.43 b	42.41 b	45.16 d	7.54 b	29.97 c	62.49 f	44.97 b	32.82 d	22.20 c	11.56 a	19.83 d	68.61 a
D2F1	11.93 b	42.08 b	45.99 cd	6.22 c	28.75 c	65.04 e	44.66 b	33.34 d	22.00 c	8.67 b	21.39 cd	69.94 a
D2F2	12.18 b	47.52 a	40.30 e	6.67 c	24.98 d	68.35 c	29.12 e	51.95 a	18.93 d	11.00 a	24.26 b	64.74 b
D2F3	9.97 c	42.09 b	47.94 bc	4.86 d	28.18 c	66.96 d	31.42 e	43.44 b	25.15 ab	6.61 bc	32.00 a	61.38 c
D3F1	12.21 b	42.80 b	44.99 d	7.49 b	36.31 a	56.20 h	34.09 d	43.31 b	22.59 c	13.63 a	24.40 b	61.97 bc
D3F2	10.99 b	38.43 c	50.58 a	5.39 d	28.08 c	66.53 d	39.71 c	38.38 c	21.91 c	7.17 bc	24.61 b	68.23 a
D3F3	15.13 a	42.87 b	42.00e	9.36 a	31.79 b	58.85 g	51.45 a	33.29 d	15.26 e	12.98 a	30.31 a	56.71 d
D1	11.95 a	39.43 b	48.62 a	5.84 a	24.35 b	69.81 a	40.54 a	35.80 b	23.66 a	8.34 b	24.31 b	67.35 a
D2	11.36 a	43.89 a	44.74 b	5.91 a	27.30 b	66.78 a	35.07 b	42.91 a	22.02 b	8.76 b	25.88 ab	65.35 ab
D3	12.78 a	41.37 a	45.86 b	7.41 a	32.06 a	60.53 a	41.75 a	38.33 b	19.92 c	11.26 a	26.44 a	62.30 b
F1	12.10 a	41.34 a	46.56 a	6.15 a	28.25 a	65.60 b	40.46 a	37.04 b	22.50 a	10.02 a	25.27 ab	64.71 b
F2	11.48 a	40.90 a	47.62 a	5.77 a	25.49 a	68.75 a	34.28 b	43.47 a	22.24 a	7.96 b	23.98 b	68.06 a
F3	12.51 a	42.45 a	45.03 b	7.25 a	29.98 a	62.77 b	42.61 a	36.52 b	20.87 b	10.38 a	27.38 a	62.23 b

Effects of nitrogen management on absorption and allocation of microelements in above-ground parts of dry direct-sowing rice

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