Crops ›› 2023, Vol. 39 ›› Issue (5): 219-223.doi: 10.16035/j.issn.1001-7283.2023.05.031

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Study on Land Productivity and Interspecific Competition of Sunflower and Millet Intercropping in Arid Areas

Yi Bing(), Liu Jingang, Song Dianxiu, Wang Dexing, Zhao Mingzhu, Liu Xiaohong, Sun Enyu, Cui Liangji()   

  1. Liaoning Academy of Agricultural Sciences, Shenyang 110161, Liaoning, China
  • Received:2022-10-21 Revised:2023-02-13 Online:2023-10-15 Published:2023-10-16

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Abstract:

In the arid areas of Fuxin and Chaoyang in western Liaoning, the intercropping experiment was carried out with the drought-tolerant crops of sunflower and millet, and the sunflower and millet monoculture (SCK、MCK) and seven row proportions of 2:2, 2:4, 2:6, 4:4, 4:6 were set to explore the land productivity and interspecific competition ability of sunflower and millet intercropping and the best intercropping mode. The results showed that, the grain yield per plant of sunflower increased with the reduction of the intercropping row ratio (two rows > four rows > SCK); the grain yield per plant of millet decreased with the reduction of the number of rows (MCK > six rows > four rows > two rows). The intercropping of sunflower and millet had the advantages of yield and economic benefit. The 4:4 intercropping in Chaoyang had the strongest advantage, the yield was increased by 195.3kg/ha, and the economic benefit was increased by 13.24%. The economic benefits of 2:4 intercropping in Fuxin and Chaoyang areas increased by 6.53% and 11.65%, respectively. The land equivalent ratio of 2:4 intercropping in Fuxin areas was the highest (1.07); the 2:4 and 4:4 intercropping in Chaoyang were 1.09 and 1.12, respectively. The actual yield loss and relative crowding coefficient also indicated that 2:4 and 4:4 intercropping had higher land productivity than monoculture. To sum up, the 2:4 and 4:4 intercropping of sunflower and millet had the advantages of increasing yield and improving economic benefits, and could be popularized and applied in the arid areas in western Liaoning.

Key words: Sunflower-millet intercropping, Yield, Land equivalent ratio, Interspecific competition

Table 1

The difference in grain yield per plant of each crop in the sunflower-millet intercropping system with different treatments"

地点
Location		 间作行比
Row proportion		 均一化种植密度（株/m2）HDi (plant/m2) 单株产量（g/株）PYi (g/plant)
向日葵Sunflower 谷子Millet 向日葵Sunflower 谷子Millet
阜新Fuxin 2:2 1.39 27.78 66.21bA 4.39cB
2:4 0.93 37.04 74.55aA 5.84bA
2:6 0.69 41.67 70.04aA 5.49bA
SCK 2.78 － 55.68cB －
MCK － 55.56 － 6.29aA
朝阳Chaoyang 2:4 0.75 32.84 173.3aA 8.11a
2:6 0.56 36.95 175.0aA 7.98a
4:4 1.12 24.63 145.3bB 8.76a
4:6 0.90 29.56 141.7bB 8.29a
SCK 2.24 － 110.7cC －
MCK － 49.26 － 9.55a

Table 2

The average estimation yield and economic benefit of each crop in the sunflower-millet intercropping system with different treatments"

地点
Location		 间作行比
Row proportion		 均一化产量Average estimation yield (kg/hm2) 间作优势
Intercropping advantage (kg/hm2)		 经济效益（元/hm2）
Economic benefit (yuan/hm2)
Yis Yim
阜新Fuxin 2:2 919.5bB 1218.3cC -382.6 13 149
2:4 690.3cC 2164.4bB 9.5 14 870
2:6 486.4dD 2286.6bB -234.5 13 524
SCK 1546.5aA － － 13 919
MCK － 3494.4aA － 13 978
朝阳Chaoyang 2:4 1293.7cC 2665.0bB -2.8 22 303
2:6 979.6dD 2948.1bB -219.2 20 609
4:4 1627.1bB 2158.8bB 195.3 23 279
4:6 1268.8cC 2451.0bB -93.3 21 224
SCK 2478.0aA － － 22 302
MCK － 4703.3aA － 18 813

Table 3

Differences in land productivity of sunflower-millet intercropping system with different treatments"

地点
Location		 间作行比
Row proportion		 LER 实际产量损失Actual loss yield 相对拥挤系数
K
AYL AYLs AYLm
阜新Fuxin 2:2 0.94bB -0.11 0.19 -0.30 0.78
2:4 1.07aA 0.27 0.34 -0.07 1.31
2:6 0.97bB 0.13 0.26 -0.13 0.87
朝阳Chaoyang 2:4 1.09bB 0.42 0.57 -0.15 1.43
2:6 1.02dC 0.42 0.58 -0.16 1.10
4:4 1.12aA 0.23 0.31 -0.08 1.62
4:6 1.03cC 0.15 0.28 -0.13 1.14

Table 4

Competitiveness between sunflower and millet under different treatments"

地点
Location		 间作行比
Row
proportion		 竞争比率CR 侵占力A
CRs CRm As Am
阜新
Fuxin		 2:2 1.71 0.59 0.49 -0.49
2:4 1.44 0.69 0.41 -0.41
2:6 1.44 0.69 0.39 -0.39
朝阳
Chaoyang		 2:4 1.84 0.54 0.72 -0.72
2:6 1.89 0.53 0.75 -0.75
4:4 1.43 0.70 0.40 -0.40
4:6 1.47 0.68 0.41 -0.41
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