Crops ›› 2025, Vol. 41 ›› Issue (1): 214-219.doi: 10.16035/j.issn.1001-7283.2025.01.027

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Effects of Slow-Release Fertilizers on Rice Growth Characteristics, Yield and Dry Matter Accumulation

Zhang Baolong1(), He Jun1,2(), Zhang Yi1, Tang Chi3, Zhang Hongtao3, Liao Wei1, Li Fei4   

  1. 1College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002,Hubei, China
    2Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region of Ministry of Education, China Three Gorges University, Yichang 443002, Hubei, China
    3Hubei Zhanghe Project Administration Bureau, Jingmen 448156, Hubei, China
    4South-to-North Water Diversion Middle Route Industrial & Development Co., Ltd., Beijing 100038, China
  • Received:2023-06-08 Revised:2023-07-26 Online:2025-02-15 Published:2025-02-12

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Abstract:

In order to explore the potential of slow-release fertilizer for increasing rice yield, the conventional rice variety (Zuanliangyouchaozhan) and the super rice variety (Y Liangyou 957) were selected as experimental materials, and conventional fertilizer and slow-release fertilizer treatments were respectively set up to conduct field effect experiments in the Zhanghe Irrigation District of Hubei Province in 2020. The results showed that slow-release fertilizer had a significant promoting effect on plant height, tiller number, chlorophyll content, dry matter accumulation, net dry matter accumulation, and population growth rate of super rice and conventional rice. The yield of the “super rice+slow-release fertilizer” treatment was the highest, at 8644.44 kg/ha. The increase in number of panicles per unit area, number of grains per panicle, and 1000-grain weight were the main reason for the yield increase of super rice under the effect of slow-release fertilizer, while the increase in number of panicles per unit area was the main reason for the yield increase of conventional rice under the effect of slow-release fertilizer. The application of slow-release fertilizers can give rice a better advantage in dry matter accumulation during the middle and late growth stages, increasing the dry matter accumulation from late tillering stage to milk ripening stage, and providing a material basis for high yield of rice.

Key words: Super rice, Slow-release fertilizer, Growth characteristics, Yield, Dry matter accumulation

Fig.1

Effects of different treatments on plant height in rice"

Fig.2

Effects of different treatments on tiller number in rice"

Fig.3

Effects of different treatments on SPAD in rice"

Fig.4

Comparison of rice yields under different treatments Different lowercase letters indicate significant differences between treatments (P < 0.05)."

Table 1

Yields and its components of rice under different treatments"

处理
Treatment		 单位面积穗数
Number of panicles
per unit area (×104/hm2)		 每穗粒数
Number of grains
per panicle		 千粒重
1000-grain
weight (g)		 结实率
Seed-setting
rate (%)		 产量
Yield
(kg/hm2)
S1N1 213.33±13.20b 176.87±17.99c 20.53±0.69a 84.31±1.41a 6509.31±454.70c
S1N2 250.33±13.61a 175.93±3.64c 20.01±0.79a 86.55±2.65a 7613.67±134.69b
S2N1 192.22±22.37b 229.33±21.09b 16.07±0.40b 93.14±1.00a 6552.91±199.40c
S2N2 213.33±16.52b 274.93±6.65a 16.31±0.20b 90.72±8.47a 8644.44±597.53a
水稻品种Rice variety 9.010* 82.316** 153.278** 6.198* 5.570*
施肥类型Fertilization type 8.805* 7.033* 0.193 0.001 49.286**
水稻品种×施肥类型Rice variety×Fertilization type 0.706 7.682* 1.317 0.799 4.703

Table 2

Dry matter accumulation during the whole growth period of rice under different treatments kg/hm2"

处理
Treatment		 干物质积累量Dry matter accumulation
返青期
Regreening
stage		 分蘖前期
Early tillering
stage		 分蘖后期
Late tillering
stage		 拔节孕穗期
Jointing-
booting stage		 抽穗开花期
Heading and
flowering stage		 乳熟期
Milk ripening
stage		 黄熟期
Yellow ripening
stage
S1N1 299.11a 1581.50a 3437.93a 4983.83b 8936.10b 11 862.85b 11 407.06b
S1N2 304.89a 1790.50a 3892.47a 6924.76a 9933.85a 14 241.82a 13 448.28b
S2N1 86.67b 714.24b 1386.90b 5871.10ab 9096.09ab 10 429.42c 16 010.49ab
S2N2 111.33b 674.09b 1532.30b 6841.91a 9861.36a 11 613.20b 19 025.29a
水稻品种Rice variety 403.775** 86.061** 35.663** 1.265 0.010 54.156** 14.507**
施肥类型Fertilization type 2.270 0.622 0.660 16.570** 4.101 41.661** 3.578
水稻品种×施肥类型
Rice variety×Fertilization type		 0.873 1.361 0.175 1.839 0.071 4.689 0.133

Fig.5

Dry matter accumulation dynamics of rice during the whole growth period under different treatments"

Table 3

Net dry matter accumulation and crop growth rate in rice at different growth stages under different treatments"

处理
Treatment		 返青期―分蘖期
Regreening
to tillering		 分蘖期
Tillering		 分蘖期―拔节孕穗期
Tillering to jointing-
booting		 拔节孕穗期―抽穗开花期
Jointing-booting
to heading-flowering		 抽穗开花期―乳熟期
Heading-flowering
to milk ripening		 乳熟期―黄熟期
Milk ripening
to yellow ripening
NDMA
(g/m2)		 CGR
[g/(m2·d)]		 NDMA
(g/m2)		 CGR
[g/(m2·d)]		 NDMA
(g/m2)		 CGR
[g/(m2·d)]		 NDMA
(g/m2)		 CGR
[g/(m2·d)]		 NDMA
(g/m2)		 CGR
[g/(m2·d)]		 NDMA
(g/m2)		 CGR
[g/(m2·d)]
S1N1 1282.4a 75.4a 1856.4ab 97.7ab 1545.9c 128.8c 3952.3a 329.4a 2926.8ab 266.1a -455.8b -24.0b
S1N2 1485.6a 87.4a 2102.0a 110.6a 3032.3b 252.7b 3009.1a 250.8a 4308.0a 391.6a -793.5b -41.8b
S2N1 627.6b 36.9b 672.7c 35.4c 4484.2a 373.7a 3225.0a 268.8a 1333.3c 121.2b 5581.1a 293.7a
S2N2 562.8b 33.1b 858.2bc 45.2bc 5309.6a 442.5a 3019.5a 251.6a 1751.8bc 159.3b 7412.1a 390.1a

Table 4

Dry matter accumulation during the yellow ripening period of rice under different treatments"

处理
Treatment		 根Root 茎Stem 叶Leaf 穗Panicle 合计Total
积累量
Accumulation
(kg/hm2)		 百分比Percentage
(%)		 积累量
Accumulation
(kg/hm2)		 百分比Percentage
(%)		 积累量
Accumulation
(kg/hm2)		 百分比Percentage
(%)		 积累量
Accumulation
(kg/hm2)		 百分比Percentage
(%)		 积累量
Accumulation
(kg/hm2)		 百分比Percentage
(%)
S1N1 2483.11a 21.77 3497.78b 30.66 1005.28c 8.81 4420.89c 38.76 11 407.06b 100
S1N2 3005.33a 22.35 3599.56b 26.77 1098.50bc 8.17 5744.89bc 42.72 13 448.28b 100
S2N1 2595.11a 16.21 3974.67ab 24.83 1378.04ab 8.61 8062.67ab 50.36 16 010.49ab 100
S2N2 2662.67a 14.00 5264.44a 27.67 1669.29a 8.77 9428.89a 49.56 19 025.29a 100
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