Effects of Nitrogen Fertilization Rate on Rice Yield and Soil Fertility in the Yellow River Irrigation Area of Ningxia

doi:10.7668/hbnxb.20195573

Abstract

Abstract:

In order to study the effects of different nitrogen application rates on rice yield,nitrogen uptake and soil fertility,the effects of different nitrogen application levels on rice yield,nitrogen use efficiency and soil tillage fertility in the Yellow River Irrigation Area were studied from 2021 to 2023 using rice variety Fuyuan 4 as the test material.Compared with other treatments,the average yield of 360 kg/ha was 9.4 t/ha,which was 182.94% higher than that of no nitrogen treatment,and 40.72% and 26.34% higher than that of 210,240 kg/ha.From the perspective of yield components,the increase in yield was mainly due to the increase of grain number per spike and the number of effective spikes,and excessive nitrogen application would cause the decrease of 1000-grain weight.The average of the 3-year results showed that the nitrogen use efficiency was up to 26.93% with 240 kg/ha of nitrogen,and the partial productivity of nitrogen fertilizer decreased with the increase of nitrogen application rate.The highest average value of organic matter was 18.60 g/kg after nitrogen application of 210 kg/ha.Compared with the non-nitrogen application treatment,the soil total nitrogen content of each nitrogen application treatment increased by 7.61%—15.67%,and the soil total nitrogen content of the 360 kg/ha nitrogen application treatment decreased with the increase of the experimental year.The total phosphorus content of soil was gradually reduced in the 360 kg/ha nitrogen application treatment,and the total phosphorus content in other nitrogen application treatments was maintained at about 0.85 g/kg.The total potassium content of nitrogen fertilization treatments gradually decreased with the increase of nitrogen application rate,and the total potassium content of the 360 kg/ha nitrogen application treatment decreased by 23.74%,22.16% and 8.85%,respectively,compared with the nitrogen fertilization treatments of 120,210 and 240 kg/ha.Soil available phosphorus increased with the years of the experiment,and the variation range between treatments increased with time.With the increase of nitrogen application rate,soil available phosphorus increased first and then decreased,and the soil available phosphorus of the 240 kg/ha treatment increased significantly in 2023 compared with other treatments.The soil available potassium of each treatment did not change significantly with the test years.By considering crop yield,nitrogen use efficiency and soil fertility,nitrogen application of 240 kg/ha could balance the environment and production requirements.

Key words: Rice, Yellow River Irrigation Area, Nitrogen application rate, Soil fertility

CLC Number:

S511稻
S158

WANG Ying, LIU Ruliang, WANG Fang, HONG Yu, MAO Xinping. Effects of Nitrogen Fertilization Rate on Rice Yield and Soil Fertility in the Yellow River Irrigation Area of Ningxia[J]. Acta Agriculturae Boreali-Sinica, 2025, 40(5): 127-133. doi: 10.7668/hbnxb.20195573.

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Figures/Tables 4

References 29

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年份 Year	处理 Treatment	株高/cm Plant height	穗长/cm Ear length	穗粒数/(粒/穗) Grains per panicle	千粒质量/g 1000-grain weight	有效穗数/(×10⁴穗/hm²) Effective panicles
2021	CK	64.40±2.69b	15.17±0.86c	70.13±6.34c	24.96±0.48a	291±20b
	N1	74.04±2.13a	17.29±0.80ab	92.77±1.55ab	25.08±0.08a	373±24a
	N2	78.30±6.36a	16.64±1.00b	87.27±13.42abc	25.39±0.71a	388±62a
	N3	77.28±7.51a	16.61±0.48bc	83.93±3.97bc	25.27±0.48a	417±50a
	N4	82.91±3.24a	18.55±0.75a	102.33±8.80a	25.22±0.77a	435±47a
2022	CK	63.71±1.60d	14.94±1.30c	58.07±5.10c	22.98±0.25a	311±18c
	N1	70.63±2.40c	16.53±0.51bc	82.87±5.13b	18.76±0.33b	341±39bc
	N2	74.97±1.11bc	16.66±0.88bc	87.20±1.73b	21.01±0.32a	340±19bc
	N3	77.59±3.34b	16.93±0.81ab	87.10±8.11b	22.15±0.41a	391±24b
	N4	89.00±6.45a	18.73±1.35a	108.47±5.97a	18.51±0.30b	472±40a
2023	CK	66.62±4.76c	15.14±1.25b	64.59±8.72c	26.11±0.49a	229±18c
	N1	71.37±1.28bc	16.22±0.68ab	78.25±8.88b	26.31±0.15a	256±21c
	N2	79.05±5.66ab	17.35±0.82a	84.05±8.62ab	26.32±0.22a	365±40b
	N3	80.94±3.06ab	17.41±0.29a	89.40±3.17ab	26.25±0.57a	383±19ab
	N4	84.03±9.97a	17.62±1.26a	96.67±5.39a	25.93±0.23a	432±40a

年份 Year	处理 Treatment	株高/cm Plant height	穗长/cm Ear length	穗粒数/(粒/穗) Grains per panicle	千粒质量/g 1000-grain weight	有效穗数/(×10⁴穗/hm²) Effective panicles
2021	CK	64.40±2.69b	15.17±0.86c	70.13±6.34c	24.96±0.48a	291±20b
	N1	74.04±2.13a	17.29±0.80ab	92.77±1.55ab	25.08±0.08a	373±24a
	N2	78.30±6.36a	16.64±1.00b	87.27±13.42abc	25.39±0.71a	388±62a
	N3	77.28±7.51a	16.61±0.48bc	83.93±3.97bc	25.27±0.48a	417±50a
	N4	82.91±3.24a	18.55±0.75a	102.33±8.80a	25.22±0.77a	435±47a
2022	CK	63.71±1.60d	14.94±1.30c	58.07±5.10c	22.98±0.25a	311±18c
	N1	70.63±2.40c	16.53±0.51bc	82.87±5.13b	18.76±0.33b	341±39bc
	N2	74.97±1.11bc	16.66±0.88bc	87.20±1.73b	21.01±0.32a	340±19bc
	N3	77.59±3.34b	16.93±0.81ab	87.10±8.11b	22.15±0.41a	391±24b
	N4	89.00±6.45a	18.73±1.35a	108.47±5.97a	18.51±0.30b	472±40a
2023	CK	66.62±4.76c	15.14±1.25b	64.59±8.72c	26.11±0.49a	229±18c
	N1	71.37±1.28bc	16.22±0.68ab	78.25±8.88b	26.31±0.15a	256±21c
	N2	79.05±5.66ab	17.35±0.82a	84.05±8.62ab	26.32±0.22a	365±40b
	N3	80.94±3.06ab	17.41±0.29a	89.40±3.17ab	26.25±0.57a	383±19ab
	N4	84.03±9.97a	17.62±1.26a	96.67±5.39a	25.93±0.23a	432±40a

年份 Year	处理 Treatment	籽粒吸氮量/ (kg/hm²) Nitrogen uptake by the seed	秸秆吸氮量/ (kg/hm²) Nitrogen uptake by straw	氮肥表观利用率/% Nitrogen fertilizer apparent utilization rate	氮肥偏生产力/ (kg/kg) Nitrogen fertilizer bias productivity	谷草比 Grain-to-crude ratio
2021	CK	34.95±1.95d	17.15±1.84d	—	-	1.18±0.19a
	N1	58.12±5.11c	32.13±0.85c	31.79±3.58a	45.14±1.78a	1.14±0.13a
	N2	76.55±6.41b	37.70±0.64b	29.59±2.76a	33.20±2.20b	1.27±0.15a
	N3	77.93±11.18b	40.57±1.75b	31.83±4.61a	32.69±2.96b	1.29±0.07a
	N4	105.83±13.78a	49.31±5.12a	27.62±3.54a	27.55±3.27c	1.25±0.06a
2022	CK	45.30±4.81c	22.37±6.23c	—		1.34±0.26a
	N1	72.30±1.63b	29.45±5.44bc	28.38±4.06a	49.56±2.74a	1.53±0.32a
	N2	80.14±10.83b	30.56±2.58bc	23.82±1.86a	32.80±5.16b	1.51±0.14a
	N3	88.71±9.76b	37.24±4.20b	24.95±4.75a	31.91±5.23b	1.53±0.04a
	N4	117.48±15.46a	49.12±3.10a	23.14±2.86a	27.51±2.45b	1.28±0.06a
2023	CK	35.18±3.66d	19.42±4.18d	—	-	1.02±0.09b
	N1	51.35±1.62c	22.05±3.32cd	15.67±3.28b	36.84±4.56a	1.23±0.15ab
	N2	73.68±3.66b	27.86±1.69bc	23.31±1.49a	29.45±1.43b	1.38±0.24a
	N3	74.22±8.94b	29.94±0.63ab	24.00±5.06a	28.42±1.18b	1.38±0.12a
	N4	94.85±5.75a	36.39±4.11a	20.36±3.09ab	23.29±1.58c	1.37±0.05a

年份 Year	处理 Treatment	籽粒吸氮量/ (kg/hm²) Nitrogen uptake by the seed	秸秆吸氮量/ (kg/hm²) Nitrogen uptake by straw	氮肥表观利用率/% Nitrogen fertilizer apparent utilization rate	氮肥偏生产力/ (kg/kg) Nitrogen fertilizer bias productivity	谷草比 Grain-to-crude ratio
2021	CK	34.95±1.95d	17.15±1.84d	—	-	1.18±0.19a
	N1	58.12±5.11c	32.13±0.85c	31.79±3.58a	45.14±1.78a	1.14±0.13a
	N2	76.55±6.41b	37.70±0.64b	29.59±2.76a	33.20±2.20b	1.27±0.15a
	N3	77.93±11.18b	40.57±1.75b	31.83±4.61a	32.69±2.96b	1.29±0.07a
	N4	105.83±13.78a	49.31±5.12a	27.62±3.54a	27.55±3.27c	1.25±0.06a
2022	CK	45.30±4.81c	22.37±6.23c	—		1.34±0.26a
	N1	72.30±1.63b	29.45±5.44bc	28.38±4.06a	49.56±2.74a	1.53±0.32a
	N2	80.14±10.83b	30.56±2.58bc	23.82±1.86a	32.80±5.16b	1.51±0.14a
	N3	88.71±9.76b	37.24±4.20b	24.95±4.75a	31.91±5.23b	1.53±0.04a
	N4	117.48±15.46a	49.12±3.10a	23.14±2.86a	27.51±2.45b	1.28±0.06a
2023	CK	35.18±3.66d	19.42±4.18d	—	-	1.02±0.09b
	N1	51.35±1.62c	22.05±3.32cd	15.67±3.28b	36.84±4.56a	1.23±0.15ab
	N2	73.68±3.66b	27.86±1.69bc	23.31±1.49a	29.45±1.43b	1.38±0.24a
	N3	74.22±8.94b	29.94±0.63ab	24.00±5.06a	28.42±1.18b	1.38±0.12a
	N4	94.85±5.75a	36.39±4.11a	20.36±3.09ab	23.29±1.58c	1.37±0.05a

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