Crops ›› 2021, Vol. 37 ›› Issue (6): 211-216.doi: 10.16035/j.issn.1001-7283.2021.06.034

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Effects of Planting Small Whole Potatoes with Different Specifications and Seed Dressing on the Growth and Yield of Potatoes in Continuous Cropping Land

Luo Lei1,2(), Li Yajie1,2, Yao Yanhong1,2, Li Fengxian1,2, Fan Yi1,2, Dong Aiyun1,2, Liu Huixia1,2, Niu Caiping1,2, Li Deming1,2()   

  1. 1Dingxi Academy of Agricultural Sciences, Dingxi 743000, Gansu, China
    2Gansu Potato Engineering Technology Research Center, Dingxi 743000, Gansu, China
  • Received:2020-11-04 Revised:2021-08-19 Online:2021-12-15 Published:2021-12-16
  • Contact: Li Deming E-mail:dxluolei56998@163.com;dxlideming@163.com

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Abstract:

The Dingshu No.5 was selected as the test material, and the field experiments were carried out in the continuous cropping land to study the effects of sowing small whole potato with different specifications and medicament seed dressing on potato growth and yield. The results showed that compared with seed potatoes cutted, the seedling stage and the maturity stage of small whole potato planting treatment were earlier, the plant height was higher, the number of roots per plant, the number of main stems per plant and the number of tubers per plant were increased, the emergence rate, the large and medium potatoes rate and the yield were increased. Compared with untreated seed potatoes, the plant height was higher, the number of main stems per plant, the stolon number per plant and the number of tubers per plant were increased, the emergence rate, the large and medium potatoes rate and the yield were increased, and the treatment of 72% agricultural streptomycin 0.04kg + talc powder 2kg dressing 50kg seed potato had the best effect on the control efficiency (60.1%) of potato black scurf.

Key words: Potato, Continuous cropping land, Small whole potato, Medicament seed dressing, Agronomic trait, Economic trait, Black scurf

Table 1

Variation of growth period of potato under different treatments"

处理
Treatment		 出苗期（月-日）
Emergence (month-day)		 现蕾期（月-日）
Budding (month-day)		 开花期（月-日）
Flowering (month-day)		 成熟期（月-日）
Maturity (month-day)		 生育期
Growth duration (d)
T1 05-23 06-19 06-30 09-22 122
T2 05-20 06-16 06-28 09-18 121
T3 05-19 06-14 06-25 09-18 122
CK 05-27 06-24 07-08 09-30 126
平均值Average – – – – 122.75
标准差Standard deviation – – – – 2.22
变异系数
Coefficient of variation (%)		 – – – – 1.79

Table 2

The differences of main agronomic traits of potato under different treatments"

处理
Treatment		 单株根数
Root
number
per plant		 最大根长
Maximum
root length
(cm)		 株高
Plant
height
(cm)		 主茎粗
Main stem
diameter
(cm)		 单株主茎数
Main stem
number per
plant
T1 9.3c 8.7c 70.7b 1.13b 4.2b
T2 10.5a 9.6b 74.8a 1.17b 4.6b
T3 9.8b 10.4a 74.1a 1.08c 5.3a
CK 6.1d 5.9d 65.6c 1.39a 2.7c

Table 3

The differences of main economic traits of potato under different treaments"

处理
Treatment		 出苗率
Emergence rate (%)		 单株产量
Yield per plant (kg)		 单株结薯数
Tuber number per plant		 大中薯率
Big and medium potatoes rate (%)		 产量
Yield (t/hm2)		 比对照增产
Yield increase rate (%)
T1 94.0a 0.58c 7.4c 90.5b 29.06c 11.9
T2 94.7a 0.70a 8.3b 93.3a 35.12a 35.2
T3 95.1a 0.64b 9.1a 93.2a 32.07b 23.5
CK 87.3b 0.52d 6.2d 85.6c 25.97d –

Table 4

The differences of main agronomic traits of potato under different seed-dressing treaments"

处理
Treatment		 株高
Plant
height
(cm)		 主茎粗
Main stem
diameter
(cm)		 单株主茎数
Main stem
number per
plant		 叶面积
Leaf
area
(cm2)		 匍匐茎数
Stolon
number
per plant
R1 70.5b 1.31d 4.6b 3163.7c 11.8c
R2 71.3b 1.30d 5.1a 3466.2b 14.0b
R3 66.3c 1.39b 4.7b 3215.4c 12.4c
R4 67.7c 1.38b 4.5b 3916.7a 12.4c
R5 73.7a 1.35c 5.4a 3537.6b 15.1a
CK 61.3d 1.41a 4.0c 3600.5b 10.3d

Table 5

The differences of main economic traits of potato under different seed-dressing treatments"

处理
Treatment		 出苗率
Emergence rate (%)		 单株产量
Yield per plant (kg)		 单株结薯数
Tuber number per plant		 大中薯率
Big and medium potato rate (%)		 产量
Yield (t/hm2)		 比对照增产
Yield increase rate (%)
R1 97.0b 0.79b 9.0a 87.0d 35.88b 13.1
R2 96.3b 0.93a 8.8a 97.6a 42.17a 32.9
R3 96.7b 0.83b 8.3b 91.5c 36.70b 15.7
R4 96.7b 0.81b 8.3b 91.8c 35.60b 12.2
R5 99.7a 0.94a 8.9a 95.3b 42.22a 33.1
CK 92.7c 0.73c 7.7c 87.0d 31.72c –

Table 6

Control efficacy of different seed-dressing treatments on potato black scurf"

处理
Treatment		 病薯率
Disease incidence (%)		 病情指数
Disease index		 防效
Control effect (%)
R1 9.27 1.31 33.8c
R2 7.44 1.00 49.5b
R3 7.06 0.94 52.5b
R4 6.18 0.79 60.1a
R5 6.56 0.83 58.1a
CK 12.41 1.98 –
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