Effects of rape straw returning in winter paddy field and nitrogen fertilizer management on dry matter accumulation and yield of hybrid rice

doi:10.3969/j.issn.1004-1524.2023.05.02

Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (5): 983-991.DOI: 10.3969/j.issn.1004-1524.2023.05.02

• Crop Science • Previous Articles Next Articles

Effects of rape straw returning in winter paddy field and nitrogen fertilizer management on dry matter accumulation and yield of hybrid rice

HUANG Zheng(), ZHANG Rongping(), MA Peng, ZHANG Qi, ZHOU Ningning, ASHEN Rigui, FENG Tingyu, ZHOU Lin

School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China

Received:2022-04-18 Online:2023-05-25 Published:2023-06-01

Abstract

Abstract:

In order to explore the suitable nitrogen fertilizer management for rice under rape straw returning in winter paddy field in southern Sichuan Province, China, a 2-factor randomized block design was adopted in the present study, to reveal the effects of rape straw returning and nitrogen fertilizer management on tillering dynamics, dry matter accumulation and yield of hybrid rice. Speicifically, two straw returning methods were set: T1, no straw returning; T2, full straw returning. Four nitrogen treatments were set: N1, no nitrogen fertilizer was used as the blank control; N2-N4, On the basis of 150 kg·hm^-2 N application, the proportion of basal fertilizer, tiller fertilizer and ear fertilizer was 5∶3∶2, 3∶3∶4, and 3∶2∶5, respectively. The results showed that under the same straw returning method, N2, N3, N4 treatments had no significant effect on the tiller number of hybrid rice at the highest stage. Without straw returning, the N3 treatment could effectively improve the spilke rate, dry matter accumulation from the highest tillering stage to the maturity stage, and yield of hybrid rice. With straw returning, the dry matter accumulation at the maturity stage and yield of N2 and N3 treatments were the highest among the four nitrogen treatments, but there was no significant difference between N2 and N3 treatments. Given straw returning and nitrogen management, the returning of full amount of rape straw coupled with the proportion of N in basal fertilizer, tiller fertilizer and ear fertilizer as 5∶3∶2, the highest yield of hybrid rice could be achieved under the experiment condition as 10.12 t·hm^-2.

Key words: straw returning, nitrogen fertilizer management, dry matter accumulation, yield

CLC Number:

S511.06

HUANG Zheng, ZHANG Rongping, MA Peng, ZHANG Qi, ZHOU Ningning, ASHEN Rigui, FENG Tingyu, ZHOU Lin. Effects of rape straw returning in winter paddy field and nitrogen fertilizer management on dry matter accumulation and yield of hybrid rice[J]. Acta Agriculturae Zhejiangensis, 2023, 35(5): 983-991.

Figures/Tables 6

References 32

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秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	不同移栽天数的水稻分蘖数Tiller number after different time of transplanting
秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	7 d	14 d	21 d	28 d	35 d	42 d
T1	N1	30.92 b	61.11 b	131.67 c	242.41 b	292.96 b	275.62 b
	N2	46.48 a	92.41 a	182.59 b	298.33 a	366.85 a	346.85 a
	N3	43.52 a	95.19 a	193.70 a	302.22 a	363.70 a	348.52 a
	N4	44.63 a	90.56 a	180.00 b	292.78 a	360.74 a	342.65 a
T2	N1	35.00 b	75.93 b	149.63 b	269.63 b	296.48 b	291.23 d
	N2	45.00 a	100.74 a	211.30 a	325.93 a	352.59 a	345.19 a
	N3	41.48 ab	100.37 a	207.22 a	325.19 a	359.63 a	339.38 b
	N4	42.78 ab	96.48 a	197.22 a	317.59 a	359.67 a	332.59 c

秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	不同移栽天数的水稻分蘖数Tiller number after different time of transplanting
秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	7 d	14 d	21 d	28 d	35 d	42 d
T1	N1	30.92 b	61.11 b	131.67 c	242.41 b	292.96 b	275.62 b
	N2	46.48 a	92.41 a	182.59 b	298.33 a	366.85 a	346.85 a
	N3	43.52 a	95.19 a	193.70 a	302.22 a	363.70 a	348.52 a
	N4	44.63 a	90.56 a	180.00 b	292.78 a	360.74 a	342.65 a
T2	N1	35.00 b	75.93 b	149.63 b	269.63 b	296.48 b	291.23 d
	N2	45.00 a	100.74 a	211.30 a	325.93 a	352.59 a	345.19 a
	N3	41.48 ab	100.37 a	207.22 a	325.19 a	359.63 a	339.38 b
	N4	42.78 ab	96.48 a	197.22 a	317.59 a	359.67 a	332.59 c

秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	移栽后不同时间的水稻相对分蘖速率Relative tillering rate during different time of transplanting
秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	7~14 d	14~21 d	21~28 d	28~35 d	35~42 d
T1	N1	0.098 b	0.111 a	0.087 b	0.027 a	-0.009 d
	N2	0.099 b	0.098 a	0.070 a	0.030 a	-0.008 c
	N3	0.110 a	0.102 a	0.064 a	0.027 a	-0.006 a
	N4	0.100 ab	0.098 a	0.069 a	0.030 a	-0.007 b
T2	N1	0.111 a	0.097 a	0.084 a	0.013 a	-0.002 a
	N2	0.115 a	0.106 a	0.062 b	0.011 a	-0.003 b
	N3	0.126 a	0.104 a	0.064 b	0.014 a	-0.008 c
	N4	0.117 a	0.102 a	0.068 ab	0.018 a	-0.011 d

秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	移栽后不同时间的水稻相对分蘖速率Relative tillering rate during different time of transplanting
秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	7~14 d	14~21 d	21~28 d	28~35 d	35~42 d
T1	N1	0.098 b	0.111 a	0.087 b	0.027 a	-0.009 d
	N2	0.099 b	0.098 a	0.070 a	0.030 a	-0.008 c
	N3	0.110 a	0.102 a	0.064 a	0.027 a	-0.006 a
	N4	0.100 ab	0.098 a	0.069 a	0.030 a	-0.007 b
T2	N1	0.111 a	0.097 a	0.084 a	0.013 a	-0.002 a
	N2	0.115 a	0.106 a	0.062 b	0.011 a	-0.003 b
	N3	0.126 a	0.104 a	0.064 b	0.014 a	-0.008 c
	N4	0.117 a	0.102 a	0.068 ab	0.018 a	-0.011 d

秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	各生育期的地上部干物质量 Dry weight of aboveground part under different growth periood
秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	最高分蘖期 Highest tillering	齐穗期 Full heading	成熟期 Maturity
T1	N1	2.56 c	11.35 c	16.36 d
	N2	3.62 a	13.89 ab	20.24 b
	N3	3.35 b	14.26 a	21.06 a
	N4	3.49 ab	13.64 b	19.00 c
T2	N1	2.62 c	11.14 c	17.03 c
	N2	3.95 a	15.77 a	22.05 a
	N3	3.72 b	15.10 b	21.91 a
	N4	3.85 ab	14.69 b	20.65 b

Effects of rape straw returning in winter paddy field and nitrogen fertilizer management on dry matter accumulation and yield of hybrid rice

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秸秆还田方式 Straw returning method	氮肥处理 Nitrogen treatment	有效穗数 Effective panicle number/(10⁴ hm^-2)	每穗着粒数 Number of spikelets per panicle	结实率 Seed setting rate/%	千粒重 1 000-grain weight/g	产量 Yield/(t·hm^-2)
T1	N1	213.33 d	139.9 c	78.62 b	34.37 a	8.06 d
	N2	227.86 b	145.9 ab	81.05 a	34.53 a	9.30 b
	N3	230.92 a	147.19 a	81.50 a	34.84 a	9.65 a
	N4	223.60 c	142.02 bc	79.71 ab	34.41 a	8.71 c
T2	N1	218.56 c	142.71 c	79.21 b	34.41 a	8.50 c
	N2	232.45 a	150.15 a	83.40 a	34.78 a	10.12 a
	N3	232.24 a	148.24 ab	83.51 a	35.01 a	10.07 a
	N4	226.65 b	145.14 bc	82.25 a	34.67 a	9.38 b

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