Effect of proportion of slow-release nitrogen in base fertilizer on tillering and nitrogen uptake and utilization of single-cropping late rice

doi:10.3969/j.issn.1004-1524.2022.10.20

Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (10): 2259-2267.DOI: 10.3969/j.issn.1004-1524.2022.10.20

• Environmental Science • Previous Articles Next Articles

Effect of proportion of slow-release nitrogen in base fertilizer on tillering and nitrogen uptake and utilization of single-cropping late rice

ZHANG Jinping¹^,²(), CHEN Zhaoming², WANG Qiang²^,^*(), MA Junwei², YU Qiaogang², YE Jing², MA Jinchuan², SUN Wanchun²

1. College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, China
2. Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Received:2021-09-01 Online:2022-10-25 Published:2022-10-26
Contact: WANG Qiang

Abstract

Abstract:

In the present study, a greenhouse pot experiment was conducted to investigate the effects of application of different proportions of slow-release nitrogen fertilizer (SRN) in base fertilizer on the tillering dynamics, rice growth and nitrogen uptake and utilization of single-cropping late rice, hence to provide theoretical guidance for one-time fertilization technology on rice production. Five treatments were set: N0, no nitrogen; CF, conventional fertilization; 20%SRN, application of 20% (in basal fertilizer, the same as below) N via SRN; 40%SRN, application of 40% N via SRN; 60%SRN, application of 60% N via SRN. It was shown that the changes in the number of tillers over time fit in with the quadratic equation (P<0.05). Compared with CF treatment, application of SRN did not significantly (P>0.05) increase the theoretical maximum tillers and rice spike rate. Besides, application of SRN had no significant effect on rice yield as compared with CF treatment. At the tillering stage and booting stage, no significant difference was found in nitrogen accumulation in roots and shoots in all treatments with N, but the 20%SRN and 40%SRN treatments signficantly (P<0.05) reduced the N uptake and the apparent nitrogen utilization rate at the maturity stage as compared with the CF treatment. In summary, compared with the CF treatment, application of different proportions of SRN in base fortilizer did not increase the ineffective tillers of rice. Among the SRN treatments, the 60%SRN treatment had no significant difference on rice yield, spike rate and nitrogen uptake and utilization as compared with the CF treatment.

Key words: pot experiment, rice, slow-release nitrogen fertilizer, yield, nitrogen use efficiency

CLC Number:

S147.5

ZHANG Jinping, CHEN Zhaoming, WANG Qiang, MA Junwei, YU Qiaogang, YE Jing, MA Jinchuan, SUN Wanchun. Effect of proportion of slow-release nitrogen in base fertilizer on tillering and nitrogen uptake and utilization of single-cropping late rice[J]. Acta Agriculturae Zhejiangensis, 2022, 34(10): 2259-2267.

Figures/Tables 9

References 33

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处理 Treatment	基肥(缓释氮肥) Base fertilizer (slow-release nitrogen fertilizer)	分蘖肥 Tillering fertilizer	穗肥 Ear fertilizer	合计 Total
N0	0(0)	0	0	0
CF	1.11(0)	0.83	0.83	2.77
20%SRN	2.77(0.54)	0	0	2.77
40%SRN	2.77(1.10)	0	0	2.77
60%SRN	2.77(1.66)	0	0	2.27

处理 Treatment	基肥(缓释氮肥) Base fertilizer (slow-release nitrogen fertilizer)	分蘖肥 Tillering fertilizer	穗肥 Ear fertilizer	合计 Total
N0	0(0)	0	0	0
CF	1.11(0)	0.83	0.83	2.77
20%SRN	2.77(0.54)	0	0	2.77
40%SRN	2.77(1.10)	0	0	2.77
60%SRN	2.77(1.66)	0	0	2.27

处理 Treatment	拟合方程 Fitting equation	R²	理论最大分蘖数 Theoretical maximum tillers	理论最大分蘖时间 Theoretical maximum tiller time/d
N0	y=-0.002 9x²+0.244 3x+3.173 5	0.769 4^*	8.3	42.1
CF	y=-0.006 5x²+0.616 8x+1.551 4	0.900 1^**	16.2	47.5
20%SRN	y=-0.005 2x²+0.555 2x+0.911 6	0.916 6^**	15.7	53.4
40%SRN	y=-0.006 4x²+0.568 0x+3.890 1	0.932 6^**	16.5	44.4
60%SRN	y=-0.006 0x²+0.582 3x+2.267 2	0.916 9^**	16.4	48.5

处理 Treatment	拟合方程 Fitting equation	R²	理论最大分蘖数 Theoretical maximum tillers	理论最大分蘖时间 Theoretical maximum tiller time/d
N0	y=-0.002 9x²+0.244 3x+3.173 5	0.769 4^*	8.3	42.1
CF	y=-0.006 5x²+0.616 8x+1.551 4	0.900 1^**	16.2	47.5
20%SRN	y=-0.005 2x²+0.555 2x+0.911 6	0.916 6^**	15.7	53.4
40%SRN	y=-0.006 4x²+0.568 0x+3.890 1	0.932 6^**	16.5	44.4
60%SRN	y=-0.006 0x²+0.582 3x+2.267 2	0.916 9^**	16.4	48.5

处理 Treatment	分蘖盛期Tillering stage		孕穗期Booting stage		成熟期Maturity stage
处理 Treatment	R	S	R	S	R	S
N0	0.97±0.25 c	3.87±0.38 d	3.10±0.62 c	10.15±0.49 c	7.73±0.65 d	33.37±0.80 c
CF	2.57±0.06 a	11.05±0.78 a	9.03±0.68 b	37.07±3.05 b	11.00±0.40 c	76.12±3.52 a
20%SRN	1.53±0.21 b	8.10±0.92 bc	10.85±0.35 a	45.45±4.88 a	12.47±0.95 ab	66.70±3.21 b
40%SRN	1.53±0.40 b	8.43±0.76 b	10.87±0.75 a	43.37±0.25 a	11.32±0.92 bc	66.11±1.43 b
60%SRN	1.67±0.31 b	6.80±0.42 c	9.30±0.00 b	35.30±2.26 b	13.28±0.07 a	74.37±1.23 a

Effect of proportion of slow-release nitrogen in base fertilizer on tillering and nitrogen uptake and utilization of single-cropping late rice

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处理 Treatment	分蘖盛期 Tillering stage	孕穗期 Booting stage	成熟期 Maturity stage
N0	0.25±0.07 ab	0.27±0.02 a	0.23±0.02 a
CF	0.26±0.04 a	0.24±0.01 a	0.14±0.01 c
20%SRN	0.19±0.01 ab	0.23±0.02 a	0.20±0.01 b
40%SRN	0.18±0.03 b	0.25±0.02 a	0.18±0.02 b
60%SRN	0.21±0.03 ab	0.27±0.05 a	0.17±0.01 b

处理 Treatment	分蘖盛期Tillering stage		孕穗期Booting stage		成熟期Maturity stage
处理 Treatment	R	S	R	S	R	S
N0	0.008 7±0.001 9 b	0.060 8±0.002 9 b	0.015 8±0.002 1 b	0.114 8±0.030 9 b	0.044 0±0.002 5 b	0.252 2±0.018 1 c
CF	0.030 0±0.006 8 a	0.252 8±0.051 3 a	0.054 5±0.002 0 a	0.438 9±0.048 2 a	0.061 7±0.005 0 ab	0.594 6±0.026 5 a
20%SRN	0.025 0±0.003 8 a	0.270 4±0.049 5 a	0.063 9±0.015 4 a	0.490 6±0.117 8 a	0.071 7±0.011 1 ab	0.475 3±0.058 9 b
40%SRN	0.023 3±0.004 4 a	0.273 7±0.034 4 a	0.066 8±0.006 6 a	0.449 3±0.042 6 a	0.060 5±0.004 7 ab	0.504 6±0.046 3 b
60%SRN	0.024 2±0.004 1 a	0.236 2±0.065 9 a	0.060 0±0.006 6 a	0.523 2±0.032 0 a	0.092 6±0.048 2 a	0.546 0±0.149 9 a

处理 Treatment	氮素表观利用率 Apparent nitrogen utilization rate
CF	73.94±6.29 a
20%SRN	56.16±1.64 b
40%SRN	54.50±7.40 b
60%SRN	82.51±8.32 a

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