Crops ›› 2022, Vol. 38 ›› Issue (3): 225-232.doi: 10.16035/j.issn.1001-7283.2022.03.033

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Effects of Nitrogen Fertilizer Management on Yield and Lodging Resistance Properties of Double-Cropping Hybrid Rice in Southern Hunan

Su Yuting(), Yuan Shuai(), Li Yongsong, Cui Can, Chen Pingping, Wang Xiaoyu, Yi Zhenxie()   

  1. College of Agronomy, Hunan Agricultural University/South Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410128, Hunan, China
  • Received:2021-04-09 Revised:2022-02-14 Online:2022-06-15 Published:2022-06-20
  • Contact: Yi Zhenxie E-mail:1256801231@qq.com;1395396254@qq.com;yizhenxie@126.com

Abstract:

To explore the effects of different nitrogen fertilizer management modes on yield and lodging resistance of double-cropping hybrid rice in southern Hunan, field experiments were conducted with early rice varieties Luliangyou 996 and Zhuliangyou 819 and late rice varieties H you 518 and Shengtaiyou 018 as materials for comparative study of the effects of three proportion of basal and tiller fertilizer, panicle fertilizer, and grain fertilizer (N1: 7:2:1, N2: 6:3:1, and N3: 5:4:1) on yield and lodging resistance of double-cropping rice in Hengyang county, Hunan province, in 2019-2020. The results showed that nitrogen management mode had a significant effects on the yield of double-cropping rice. The N2 treatment had the best coordination effects on the yield components and the yield was the highest. Under the condition of 50%-60% basal and tiller fertilizer ratio, all varieties had higher bending resistance and lower lodging index but individual varieties showed inter-annual differences. Compared with N1, N2 and N3 treatments had lower plant height, lower center of gravity, thicker stem wall, shorter internode, and higher internode fullness and there was no significant difference between N2 and N3 treatments. Correlation analysis showed that the key to improve lodging resistance was to reduce plant height, the height of the center of gravity, and fresh weight of single stem and to improve stem diameter and fullness of the 4th internode from the top. Comprehensively considering the lodging index and yield characters of different varieties, 6:3:1 treatment with ratio of basal and tiller fertilizer, panicle fertilizer, and grain fertilizer could better coordinate the yield characters and lodging resistance of rice to achieve the goal of high yield and lodging resistance.

Key words: Double-cropping rice, Southern Hunan, Nitrogen fertilizer management, Yield, Lodging resistance

Table 1

Effects of nitrogen fertilizer management on yield and its components of rice (2019)"

品种
Variety
处理
Treatment
有效穗数
Effective panicle
(×104/hm2)
穗粒数
Grains per
panicle
结实率
Seed setting
rate (%)
千粒重
1000-grain
weight (g)
理论产量
Theoretical
yield (t/hm2)
实际产量
Actual yield
(t/hm2)
陆两优996 N1 303.90a 85.76b 76.40b 28.20a 5.62b 5.45b
Luliangyou 996 N2 285.40b 105.92a 78.99a 27.73a 6.62a 6.25a
N3 278.20b 104.08a 76.37b 28.43a 6.29a 6.02a
株两优819 N1 324.60a 100.51b 76.02b 24.78a 6.15b 5.89b
Zhuliangyou 819 N2 313.90b 112.68a 77.25ab 24.64a 6.73a 6.48a
N3 302.30c 115.50a 78.10a 24.85a 6.78a 6.44a
H优518 N1 357.33a 104.90b 77.71b 25.87a 7.54b 7.22b
H you 518 N2 337.50b 115.81ab 78.53ab 25.81a 7.92a 7.61a
N3 325.83b 111.50a 79.40a 25.94a 7.48b 7.26ab
盛泰优018 N1 376.49a 114.70b 73.87b 25.22a 8.05b 7.81b
Shengtaiyou 018 N2 350.17ab 128.65a 79.63a 25.28a 9.07a 8.75a
N3 332.33b 129.95a 78.40a 24.67b 8.35b 8.11b

Table 2

Effects of nitrogen fertilizer management on yield and its components of rice (2020)"

品种
Variety
处理
Treatment
有效穗数
Effective panicle
(×104/hm2)
穗粒数
Grains per
panicle
结实率
Seed setting
rate (%)
千粒重
1000-grain
weight (g)
理论产量
Theoretical yield
(t/hm2)
实际产量
Actual yield
(t/hm2)
陆两优996 N1 292.63a 79.98a 78.56a 26.67b 4.93b 4.73b
Luliangyou 996 N2 305.85a 80.37a 76.87a 28.52ab 5.46a 5.22a
N3 298.13a 74.28b 77.62a 30.11a 5.20ab 5.03ab
株两优819 N1 294.25b 83.91a 80.12a 27.26a 5.44b 5.25b
Zhuliangyou 819 N2 354.25a 82.35a 77.28a 27.86a 6.21a 5.88a
N3 316.64b 82.29a 79.02a 27.92a 5.80ab 5.47b
H优518 N1 307.64b 115.22a 68.14a 24.58a 5.93b 5.77b
H you 518 N2 336.88a 122.37a 70.74a 23.87a 6.92a 6.66a
N3 322.94ab 120.62a 66.47a 24.93a 6.43ab 6.24ab
盛泰优018 N1 302.61b 113.32a 65.98b 29.11a 6.58a 6.34b
Shengtaiyou 018 N2 330.08a 110.33a 71.43a 28.68a 7.39a 7.11a
N3 309.17b 112.05a 72.71a 28.14a 7.08a 6.78ab

Table 3

Bending resistance, bending moment of force and lodging indexes of rice internodes under different nitrogen fertilizer management modes (2019)"

品种
Variety
处理
Treatment
倒3节间The 3rd internode from the top 倒4节间The 4th internode from the top
抗折力
Bending
resistance (g)
弯曲力矩
Bending moment
of force (cm·g)
倒伏指数
Lodging index
[(cm·g)/g]
抗折力
Bending
resistance (g)
弯曲力矩
Bending moment
of force (cm·g)
倒伏指数
Lodging index
[(cm·g)/g]
陆两优996
Luliangyou 996
N1 453.10b 1062.36a 234.49a 1059.59a 1275.27a 125.40a
N2 531.91a 1102.60a 207.34b 1092.88a 1320.23a 120.37a
N3 503.44a 1073.12a 212.94ab 1083.41a 1288.25a 121.77a
株两优819
Zhuliangyou 819
N1 629.83c 869.90a 138.66a 1072.39b 1008.97a 94.06a
N2 838.92a 879.56a 105.02b 1262.24a 1016.26a 80.46b
N3 741.45b 871.42a 117.55b 1112.60b 1006.42a 90.60ab
H优518
H you 518
N1 718.09b 787.69b 109.91a 899.85c 967.53b 107.54a
N2 970.17a 945.95a 98.56ab 1235.00a 1084.78a 87.83b
N3 934.07a 844.48b 90.77b 1070.96b 1007.15ab 94.23b
盛泰优018
Shengtaiyou 018
N1 923.60b 799.47a 86.58a 1187.66a 944.44a 79.57a
N2 928.52b 695.95b 75.00ab 1038.45b 826.43b 78.92a
N3 1059.64a 759.10ab 72.12b 1299.16a 889.30ab 68.67b

Table 4

Bending resistance, bending moment of force and lodging indexes of rice internodes under different nitrogen fertilizer management modes (2020)"

品种
Variety
处理
Treatment
倒3节间The 3rd internode from the top 倒4节间The 4th internode from the top
抗折力
Bending
resistance (g)
弯曲力矩
Bending moment
of force (cm·g)
倒伏指数
Lodging index
[(cm·g)/g]
抗折力
Bending
resistance (g)
弯曲力矩
Bending moment
of force (cm·g)
倒伏指数
Lodging index
[(cm·g)/g]
陆两优996
Luliangyou 996
N1 834.10a 526.60b 63.13b 915.20a 609.57b 66.82b
N2 899.27a 561.03a 62.60a 940.93a 684.22a 72.71b
N3 860.89a 579.47a 67.25a 727.93b 678.41a 93.29a
株两优819
Zhuliangyou 819
N1 950.22a 539.39a 56.31a 945.61a 601.22a 63.65b
N2 967.77a 459.94b 47.55b 949.44a 518.86b 54.68c
N3 956.58a 534.42a 55.21a 707.05b 637.08a 89.34a
H优518
H you 518
N1 969.24a 856.10a 88.39a 1262.57b 1023.10a 81.05a
N2 908.77a 801.69a 88.22a 1408.66a 914.94b 65.50b
N3 906.58a 805.96a 89.03a 1411.05a 958.30ab 67.97b
盛泰优018
Shengtaiyou 018
N1 924.36b 620.81b 67.54b 1108.70b 738.76b 66.24b
N2 1056.60a 704.07a 66.64b 1266.62a 826.98a 65.29b
N3 726.29c 660.75b 90.86a 994.37c 754.78b 75.64a

Table 5

Physical properties of rice stems under different nitrogen fertilizer management modes (2019)"

品种
Variety
处理
Treatment
株高
Plant
height
(cm)
重心高度
Gravity
center
height
(cm)
单茎鲜重
Fresh weight
per stem
(g)
茎秆粗度
Stem
diameter
(mm)
茎壁厚度
Stem wall
thickness
(mm)
节间长度
Length of internode (cm)
节间充实度
Fullness of internode (mg/cm)
倒3
The 3rd from
the top
倒4
The 4th from
the top
倒3
The 3rd from
the top
倒4
The 4th from
the top
陆两优996
Luliangyou 996
N1 103.87a 53.49a 13.86a 6.06a 0.97b 14.11a 6.94a 27.76a 28.34a
N2 99.03b 53.13a 14.86a 6.17a 1.19a 13.68a 6.55a 27.80a 28.63a
N3 99.87b 52.44a 13.89a 6.28a 1.13a 13.23a 6.23a 28.26a 28.64a
株两优819
Zhuliangyou 819
N1 103.50a 45.80a 12.09a 6.02a 1.07a 11.05a 4.11a 31.44b 32.11b
N2 97.47b 45.10a 11.97a 5.94a 1.00a 8.82b 3.71a 37.48a 39.34a
N3 97.30b 43.80b 12.16a 5.91a 1.05a 10.06ab 4.20a 35.71a 32.99a
H优518
H you 518
N1 107.43a 46.84a 11.33b 5.96a 1.03b 12.39a 6.54a 20.51a 21.71b
N2 104.03b 43.13b 13.23a 6.20a 1.17a 11.87a 5.48b 20.89a 28.24a
N3 105.17ab 43.11b 12.00ab 5.94a 1.14a 11.19a 5.75b 20.67a 22.14b
盛泰优018
Shengtaiyou 018
N1 98.90a 40.42a 11.20a 5.95a 1.03b 8.25a 4.72a 22.09b 21.59b
N2 92.10b 39.71a 10.63a 5.82a 1.08a 7.89ab 4.45a 21.78b 23.05ab
N3 95.33b 37.83b 11.62a 6.36a 1.09a 7.22b 4.48a 26.42a 25.21a

Table 6

Physical properties of rice stems under different nitrogen fertilizer management modes (2020)"

品种
Variety
处理
Treatment
株高
Plant
height
(cm)
重心高度
Gravity
center
height
(cm)
单茎鲜重
Fresh
weight
per stem
(g)
茎秆粗度
Stem
diameter
(mm)
茎壁厚度
Stem wall
thickness
(mm)
节间长度
Length of internode (cm)
节间充实度
Fullness of internode (mg/cm)
倒3
The 3rd from
the top
倒4
The 4th from
the top
倒3
The 3rd from
the top
倒4
The 4th from
the top
陆两优996
Luliangyou 996
N1 87.77a 39.19a 8.23a 5.07a 1.12a 10.15a 4.88a 19.77b 28.55b
N2 87.27a 39.02a 9.73a 5.52a 1.24a 10.34a 4.74a 24.33a 31.13a
N3 86.00a 38.76a 9.62a 5.81a 1.21a 9.43a 4.61a 22.42a 32.71b
株两优819
Zhuliangyou 819
N1 88.00a 41.10a 7.50b 5.24a 1.02b 8.85a 4.46a 23.36b 26.17b
N2 85.67b 40.13a 7.97b 5.55a 1.16a 8.57a 4.43a 25.45a 33.01a
N3 85.93b 40.92a 9.03a 4.89a 0.98b 7.94a 4.40a 26.16a 33.20b
H优518
H you 518
N1 110.70a 53.80a 11.59a 6.57b 1.23b 12.40a 5.17a 20.84b 29.98a
N2 106.53b 53.19a 11.51a 7.03a 1.36a 12.30a 5.10a 21.63ab 32.69a
N3 105.70b 52.33a 11.10a 6.43b 1.20b 12.12a 4.36b 22.01a 30.79a
盛泰优018
Shengtaiyou 018
N1 95.27a 45.50a 9.67a 6.42ab 1.24a 8.72a 3.56a 21.77b 31.58b
N2 95.63a 45.46a 10.38a 6.67a 1.25a 8.44a 3.84a 25.44ab 37.08a
N3 93.70a 45.07a 9.85a 6.24b 1.33a 7.60a 3.12a 27.88a 33.54ab

Table 7

Correlation coefficients between stem traits and stem bending resistance, bending moment of force and lodging indexes"

节间
Internode
相关系数
Correlation coefficient
株高
Plant
height
重心高度
Gravity center
height
单茎鲜重
Fresh weight
per stem
茎秆粗度
Stem
diameter
茎壁厚度
Stem wall
thickness
节间长度
Length of
internode
节间充实度
Fullness of
internode
倒3
The 3rd from
the top
抗折力 -0.0150 -0.0280 0.0409 0.1712 0.1005 -0.1832 -0.1726
弯曲力矩 0.7075** 0.5911** 0.9261** 0.5850** -0.2164 0.5133** 0.0205
倒伏指数 0.5015** 0.3890** 0.3455** 0.0987 -0.2100 -0.0047 -0.1303
倒4
The 4th from
the top
抗折力 -0.0609 -0.0130 0.2791 0.6700** 0.2813* -0.0345 0.3356**
弯曲力矩 0.7060** 0.6027** 0.9319** 0.5580** -0.2517 0.4356** -0.0215
倒伏指数 0.6471** 0.5556** 0.4205** 0.0259 -0.1260 -0.2176 0.1697
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