Crops ›› 2022, Vol. 38 ›› Issue (6): 139-144.doi: 10.16035/j.issn.1001-7283.2022.06.020

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Effects of Paclobutrazol and Nitrogen on Yield and Economic Benefit of Potato

Yang Yan1,2(), Xu Ningsheng1,2, Pan Zhechao1,2, Li Yanshan1,2, Yang Qiongfen1,2(), Zhang Lei1,2()   

  1. 1Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, Yunnan, China
    2Scientific Observing and Experimental Station of Potato and Rapeseed in Yunnan-Guizhou Plateau, Ministry of Agriculture and Rural Affairs, Kunming 650205, Yunnan, China
  • Received:2022-03-18 Revised:2022-04-29 Online:2022-12-15 Published:2022-12-21
  • Contact: Yang Qiongfen,Zhang Lei E-mail:yangyan16@yaas.org.cn;zhanglei81@yaas.org.cn;yqf@yaas.org.cn

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Abstract:

In order to screen out the combination of paclobutrazol and nitrogen fertilizer suitable for high-yield cultivation of spring potato in Yunnan, and to explore the influence of nitrogen fertilizer and paclobutrazol on potato yield and economic benefits, the field experiments were executed from 2019 to 2020. The yield and economic benefit of Yunshu 105 were evaluated under split-plot design, and paclobutrazol and nitrogen fertilizer were treated as major and minor plot, respectively. There were three concentrations of paclobutrazol (0‰, 1‰ and 2‰), and five levels of nitrogen fertilizer (0, 105, 210, 315 and 420kg/ha). The results of two-year experiments showed that different paclobutrazol and nitrogen fertilizer treatments significantly affected the yield and economic benefits of Yunshu 105. In terms of yield, the potato yield reached the maximum value when spraying 2‰ paclobutrazol and nitrogen fertilizer were applied at 210 and 315kg/ha. In terms of economic benefits, when the amount of 2‰ paclobutrazol and nitrogen fertilizer was applied at 210kg/ha, the economic benefits of Yunshu 105 were the highest.

Key words: Paclobutrazol, Nitrogen fertilizer, Potato, Yield, Economic benefit

Table 1

F value of joint variance analysis on main traits of potato"

变异来源
Source of variation		 产量
Yield		 大薯率
Large tuber rate		 中薯率
Middle tuber rate		 小薯率
Small tuber rate		 结薯个数
Tuber number
年度Year 135.67** 6.02* 17.39** 0.58 54.77**
多效唑Paclobutrazol 5.97** 4.83* 2.51 2.05 1.50
氮肥Nitrogen fertilizer 39.95** 24.80** 16.88** 7.75** 7.02**
年度×多效唑Year×paclobutrazol 0.46 0.23 0.39 1.51 1.05
年度×氮肥Year×nitrogen fertilizer 6.19** 0.14 2.83* 1.54 1.65
多效唑×氮肥Paclobutrazol× nitrogen fertilizer 0.94 1.28 0.97 0.80 0.30
年度×多效唑×氮肥Year×paclobutrazol×nitrogen fertilizer 0.25 0.58 0.70 0.82 0.19

Table 2

Effects of paclobutrazol on potato yield and its components in 2019-2020"

年份
Year		 多效唑
Paclobutrazol		 产量
Yield (t/hm2)		 大薯率
Large tuber rate (%)		 中薯率
Middle tuber rate (%)		 小薯率
Small tuber rate (%)		 结薯个数
Tuber number
2019 P0 42.04b 66.25a 22.62a 11.12a 7.13b
P1 44.12ab 68.22a 20.81a 10.97a 7.28b
P2 46.31a 67.86a 21.18a 10.96a 7.69a
2020 P0 54.16b 66.26a 22.88a 10.87ab 8.49a
P1 58.83a 68.35a 21.08ab 10.56b 8.83a
P2 59.20a 67.73a 20.61b 11.67a 8.64a
平均Mean P0 48.10b 66.78b 21.26a 11.96a 7.81a
P1 51.47a 69.20a 19.92b 10.87a 8.06a
P2 52.76a 68.91a 20.29ab 10.80a 8.17a

Table 3

Effects of nitrogen fertilizer on potato yield and its components in 2019-2020"

年份
Year		 氮肥
Nitrogen fertilizer		 产量
Yield (t/hm2)		 大薯率
Large tuber rate (%)		 中薯率
Middle tuber rate (%)		 小薯率
Small tuber rate (%)		 单株结薯个数
Tuber number per plant
2019 N0 36.35b 61.89d 25.91a 12.20a 7.01b
N1 44.02a 64.64c 23.46ab 11.90a 7.55a
N2 48.71a 71.33a 18.30d 10.37b 7.57a
N3 48.43a 70.95ab 18.69cd 10.36b 7.83a
N4 43.28a 68.41b 21.32bc 10.27b 6.89b
2020 N0 39.44d 61.89c 25.69a 12.42a 7.56c
N1 55.16c 64.42c 22.81b 12.76a 8.58b
N2 65.95a 71.56a 18.53c 9.91b 9.30a
N3 66.89a 70.95ab 18.59c 10.46b 9.24a
N4 59.53b 68.41b 21.98b 9.61b 8.58b
平均Mean N0 37.90c 63.19d 23.43a 13.38a 7.29c
N1 49.59b 65.40c 22.10a 12.50a 8.06ab
N2 57.33a 71.84a 17.89c 10.28b 8.43a
N3 57.66a 71.71a 18.65c 9.64b 8.54a
N4 51.40b 69.35b 20.37b 10.29b 7.73bc

Table 4

Two years average production cost of different treatments yuan/hm2"

多效唑
Paclobutrazol		 氮肥
Nitrogen fertilizer		 尿素
Urea		 多效唑
Paclobutrazol		 人工
Labor		 其他肥料
Other fertilizer		 种子
Seed		 农药
Pesticide		 其他
Other		 成本
Cost
P0 N0 0.00 0.00 7400.00 4096.29 7500.00 600.00 9000.00 28 596.29
N1 570.65 0.00 7400.00 4096.29 7500.00 600.00 9000.00 29 166.94
N2 1141.30 0.00 7400.00 4096.29 7500.00 600.00 9000.00 29 737.59
N3 1711.95 0.00 7400.00 4096.29 7500.00 600.00 9000.00 30 308.25
N4 2282.60 0.00 7400.00 4096.29 7500.00 600.00 9000.00 30 878.90
P1 N0 0.00 50.00 7700.00 4096.29 7500.00 600.00 9000.00 28 946.29
N1 570.65 50.00 7700.00 4096.29 7500.00 600.00 9000.00 29 516.94
N2 1141.30 50.00 7700.00 4096.29 7500.00 600.00 9000.00 30 087.59
N3 1711.95 50.00 7700.00 4096.29 7500.00 600.00 9000.00 30 658.25
N4 2282.60 50.00 7700.00 4096.29 7500.00 600.00 9000.00 31 228.90
P2 N0 0.00 100.00 7700.00 4096.29 7500.00 600.00 9000.00 28 996.29
N1 570.65 100.00 7700.00 4096.29 7500.00 600.00 9000.00 29 566.94
N2 1141.30 100.00 7700.00 4096.29 7500.00 600.00 9000.00 30 137.59
N3 1711.95 100.00 7700.00 4096.29 7500.00 600.00 9000.00 30 708.25
N4 2282.60 100.00 7700.00 4096.29 7500.00 600.00 9000.00 31 278.90

Table 5

Total incomes of different treatments yuan/hm2"

年份Year 处理Treatment P0 P1 P2 均值Average 2年平均Two-year mean
2019 N0 34 558.57 36 771.67 36 153.80 35 828.01 37 345.40
N1 42 090.66 45 953.95 43 913.81 43 986.14 49 568.28
N2 44 381.86 48 297.08 58 382.48 50 353.81 59 455.35
N3 48 242.86 50 244.57 51 390.68 49 959.37 59 943.26
N4 43 041.92 43 499.51 46 240.89 44 260.77 52 809.58
均值Average 42 463.17 44 953.36 47 216.33
2020 N0 37 756.64 39 819.39 39 012.34 38 862.79
N1 51 705.96 56 878.23 56 867.03 55 150.41
N2 60 988.08 68 733.82 75 948.78 68 556.89
N3 66 231.69 73 635.53 69 914.21 69 927.14
N4 56 486.17 63 475.22 64 113.75 61 358.38
均值Average 54 633.71 60 508.44 61 171.22 38 862.79
2年平均Two-year mean 48 548.44 52 730.90 54 193.78

Table 6

Production benefits of different treatments yuan/hm2"

年份Year 处理Treatment P0 P1 P2 均值Average 2年平均Two-year mean
2019 N0 5962.28 7825.38 7157.51 6981.72 8499.11
N1 12 923.72 16 437.01 14 346.87 14 569.20 20 151.34
N2 14 644.27 18 209.49 28 244.89 20 366.22 29 467.76
N3 17 934.61 19 586.32 20 682.43 19 401.12 29 385.01
N4 12 163.02 12 270.61 14 961.99 13 131.87 21 680.68
均值Average 12 725.58 14 865.76 17 078.74
2020 N0 9160.35 10 873.10 10 016.05 10 016.50
N1 22 539.02 27 361.29 27 300.09 25 733.47
N2 31 250.49 38 646.23 45 811.19 38 569.30
N3 35 923.44 42 977.28 39 205.96 39 368.89
N4 25 607.27 32 246.32 32 834.85 30 229.48
均值Average 24 896.11 30 420.84 31 033.63
2年平均Two-year mean 18 810.85 22 643.30 24 056.19
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