Effect of Slow-release Nitrogen Fertilizer on Rice Yield and Fertilizer Utilization Efficiency in Jiangsu Province

doi:10.11924/j.issn.1000-6850.casb2025-0913

Abstract

Abstract:

This study aims to clarify the yield-increasing and efficiency-improving effects of slow-release nitrogen fertilizer in rice fields of Jiangsu Province, providing theoretical basis for reducing fertilizer application while increasing rice production in this region. A total of five treatments with respective basal dressing and top dressing were set up in the study, including ordinary urea + ordinary urea (T₁), ordinary compound fertilizer + ordinary urea (T₂), ordinary urea + slow-release urea (T₃), slow-release urea + ordinary urea (T₄), and slow-release urea + slow-release urea (T₅). We examined the effects of different treatments on soil physicochemical properties, rice yield, and fertilizer utilization efficiency, using 'Nanjing 5718' as the test variety. The results indicated that applying slow-release nitrogen fertilizer significantly increased the content of total N and alkali-hydrolyzable N in the soil and improved the chlorophyll content and plant height of rice, thereby improving crop yield and N fertilizer utilization efficiency. The optimal treatment was T₅, which applied slow-release N fertilizer to both basal dressing and topdressing, contributing to rice yield of 9562.01 kg/hm² and N fertilizer utilization efficiency of 45.48%. The values were 25.1% and 20.3% higher than those with only ordinary urea (T₁), and 23.3% and 22.4% higher than those with compound fertilizer + ordinary urea (T₂), respectively. All the results indicated that slow-release nitrogen fertilizer had significant yield-increasing and efficiency-improving potential in rice production in Jiangsu.

Key words: slow-release urea, soil physiochemical properties, rice yield, fertilizer use efficiency

CLC Number:

S143，S146

ZHANG Jie, SHAO Wenqi, Ma Hongbo, CHEN Chuan, ZHANG Ankang, LI Chuanzhe. Effect of Slow-release Nitrogen Fertilizer on Rice Yield and Fertilizer Utilization Efficiency in Jiangsu Province[J]. Chinese Agricultural Science Bulletin, 2026, 42(8): 104-109.

Figures/Tables 7

References 23

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处理	底肥	追肥—分蘖肥	追肥—穗肥	总施肥量	施肥量（折纯）
处理	底肥	追肥—分蘖肥	追肥—穗肥	总施肥量	N	P₂O₅	K₂O
T1	普通尿素195.6，过磷酸钙肥750，氯化钾150	普通尿素150	普通尿素300	尿素645.6，过磷酸钙750，氯化钾150	297	90	90
T2	复合肥600	普通尿素150	普通尿素300	普通尿素450，复合肥600	297	90	90
T3	复合肥600	黑力旺尿素升级150	黑力旺尿素升级300	黑力旺尿素升级450，复合肥600	297	90	90
T4	黑力旺尿素升级195.6，过磷酸钙750，氯化钾150	普通尿素150	普通尿素300	黑力旺尿素升级195.6，普通尿素450，过磷酸钙750，氯化钾150	297	90	90
T5	黑力旺尿素升级195.6，过磷酸钙750，氯化钾150	黑力旺尿素升级150	黑力旺尿素升级300	黑力旺尿素升级645.6，过磷酸钙750，氯化钾150	297	90	90

处理	底肥	追肥—分蘖肥	追肥—穗肥	总施肥量	施肥量（折纯）
处理	底肥	追肥—分蘖肥	追肥—穗肥	总施肥量	N	P₂O₅	K₂O
T1	普通尿素195.6，过磷酸钙肥750，氯化钾150	普通尿素150	普通尿素300	尿素645.6，过磷酸钙750，氯化钾150	297	90	90
T2	复合肥600	普通尿素150	普通尿素300	普通尿素450，复合肥600	297	90	90
T3	复合肥600	黑力旺尿素升级150	黑力旺尿素升级300	黑力旺尿素升级450，复合肥600	297	90	90
T4	黑力旺尿素升级195.6，过磷酸钙750，氯化钾150	普通尿素150	普通尿素300	黑力旺尿素升级195.6，普通尿素450，过磷酸钙750，氯化钾150	297	90	90
T5	黑力旺尿素升级195.6，过磷酸钙750，氯化钾150	黑力旺尿素升级150	黑力旺尿素升级300	黑力旺尿素升级645.6，过磷酸钙750，氯化钾150	297	90	90

处理	全氮/(g/kg)	全磷/(mg/kg)	全钾/(g/kg)	碱解氮/(mg/kg)	有效磷/(mg/kg)	速效钾/(mg/kg)	有机质/(g/kg)	pH
T1	0.91±0.03d	562.57±75.34b	6.31±0.12b	66.22±10.42d	8.01±0.93a	107.33±2.89a	20.06±0.31a	8.44±0.03b
T2	0.96±0.03cd	677.31±16.72a	6.87±0.22a	80.08±1.54c	8.13±0.19a	108.67±4.93a	21.00±2.39a	8.50±0.06b
T3	1.08±0.02ab	636.88±10.98ab	6.08±0.13b	94.20±1.18ab	8.92±1.51a	112.67±3.21a	22.56±1.34a	8.60±0.03a
T4	1.01±0.08bc	692.07±58.69a	6.24±0.25b	85.73±8.23bc	8.26±0.63a	99.67±5.13a	22.09±3.26a	8.49±0b
T5	1.14±0.03a	646.66±31.66ab	6.35±0.47b	97.79±1.33a	8.38±0.80a	105.00±13.23a	23.59±3.17a	8.51±0.04b

处理	全氮/(g/kg)	全磷/(mg/kg)	全钾/(g/kg)	碱解氮/(mg/kg)	有效磷/(mg/kg)	速效钾/(mg/kg)	有机质/(g/kg)	pH
T1	0.91±0.03d	562.57±75.34b	6.31±0.12b	66.22±10.42d	8.01±0.93a	107.33±2.89a	20.06±0.31a	8.44±0.03b
T2	0.96±0.03cd	677.31±16.72a	6.87±0.22a	80.08±1.54c	8.13±0.19a	108.67±4.93a	21.00±2.39a	8.50±0.06b
T3	1.08±0.02ab	636.88±10.98ab	6.08±0.13b	94.20±1.18ab	8.92±1.51a	112.67±3.21a	22.56±1.34a	8.60±0.03a
T4	1.01±0.08bc	692.07±58.69a	6.24±0.25b	85.73±8.23bc	8.26±0.63a	99.67±5.13a	22.09±3.26a	8.49±0b
T5	1.14±0.03a	646.66±31.66ab	6.35±0.47b	97.79±1.33a	8.38±0.80a	105.00±13.23a	23.59±3.17a	8.51±0.04b

处理	穗数/(万穗/hm²)	穗粒数	千粒重/g	产量/(kg/hm²)
T1	264.08±3.12b	116±11a	25.00±0.10a	7643.25±679.93b
T2	265.44±7.36b	117±14a	24.88±0.50a	7753.95±1146.02b
T3	300.15±6.13a	123±11a	25.07±0.44a	9245.12±786.21a
T4	301.51±30.65a	124±11a	24.05±0.97b	8960.98±338.70ab
T5	313.76±7.17a	120±5a	25.34±0.15a	9562.01±167.22a