Crops ›› 2022, Vol. 38 ›› Issue (1): 190-195.doi: 10.16035/j.issn.1001-7283.2022.01.029

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Effects of Different Nitrogen Application Rates Combined with Extracts of Paecilomyces variotii (ZNC) on Growth and Nitrogen Uptake of Pakchoi

Wang Qingbin1,2(), Lu Jiechun2, Peng Chun’e3, Meng Hui2, Liu Zhiguo2, Wang Hongfeng2, Zhang Min1()   

  1. 1National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources/College of Resources and Environment, Shandong Agricultural University, Tai’an 271018, Shandong, China
    2Shandong Pengbo Biotechnology Co., LTD., Tai’an 271018, Shandong, China
    3State Key Laboratory of Crop Biology/College of Life Sciences, Shandong Agricultural University, Tai’an 271018, Shandong, China
  • Received:2021-01-18 Revised:2021-05-25 Online:2022-02-15 Published:2022-02-16
  • Contact: Zhang Min E-mail:wangqingbin1203@163.com;minzhang-2002@163.com

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Abstract:

The aim of this study was to investigate the effects of Paecilomyces variotii extract (ZNC) on the growth and nitrogen absorption of pakchoi in the field, in order to provide technical reference and theoretical basis for the energy saving and efficient production of pakchoi. For pakchoi variety “Xiuqing”, with no nitrogen fertilizer (CK) as control, the water treatment group was set to reduce 1/3 nitrogen (240kg/ha) (2/3 U), normal nitrogen (360kg/ha) (U) and increase 1/3 nitrogen (480kg/ha) (4/3 U), and ZNC group (2/3 UZ, UZ, 4/3 UZ), a total of seven treatments were used. The results showed that there was a coupling interaction between nitrogen rate and ZNC. Compared with the treatments of 2/3 U and U, the fresh weight, yield, agronomic efficiency and partial productivity of 2/3 UZ and UZ increased by 10.49%-27.75%, 10.51%-19.63%, 38.72%-54.62% and 10.49%-19.62%, respectively, and the net income increased by 4200-9000 yuan/ha. Compared with U, nitrogen agronomic efficiency and nitrogen partial productivity of 2/3 UZ were increased by 37.75% and 45.59% respectively, while production and net income did not decrease significantly. In conclusion, compared with the control, ZNC increased the nitrogen agronomic efficiency and partial nitrogen productivity, and achieved high yield and high efficiency; 2/3 UZ and U yield were equivalent, and the nitrogen agronomic efficiency and nitrogen partiality productivity were significantly improved, so as to achieve the purpose of reducing the amount of fertilizer but achieved increasing efficiency.

Key words: Pakchoi, Nitrogen application rate, Extract from Paecilomyces variotii, Nitrogen uptake, Yield

Fig.1

Effects of combined application of ZNC on morphological indexes of pakchoi The different lowercase letters indicate significant difference at the 0.05 level"

Table 1

Effects of combined application of ZNC on yield and nitrogen uptake of pakchoi"

处理
Treatment		 产量
Yield (t/hm2)		 氮素积累量
N accumulation (kg/hm2)		 氮素农学效率
N agronomic efficiency (kg/kg)		 氮肥偏生产力
N partial productivity (kg/kg)
CK 14.71±0.66f 39.01±1.20d – –
2/3U 20.18±0.12e 49.44±1.36c 22.78±0.50d 84.08±0.50b
2/3UZ 22.30±0.18d 46.85±2.87c 31.60±0.73b 92.90±0.73a
U 22.97±0.10d 71.06±1.84b 22.94±0.29d 63.81±0.29d
UZ 27.48±0.18c 74.38±2.88b 35.47±0.49a 76.33±0.49c
4/3U 31.02±0.09a 94.94±0.15a 33.97±0.18a 64.62±0.18d
4/3UZ 28.49±0.44b 92.07±0.36a 28.70±0.92c 59.35±0.92e

Table 2

Analysis of variance (F-value) of morphological indexes of pakchoi under combined application of ZNC"

变异来源
Source of variation		 自由度
df		 莲座期Rosette stage 收获期Harvest stage
株高
Plant
height		 单株叶片数
Number of blades
per plant		 单株叶面积
Leaf area
per plant		 单株鲜重
Fresh weight
per plant		 株高
Plant
height		 单株叶片数
Number of blades
per plant		 单株叶面积
Leaf area
per plant		 单株鲜重
Fresh weight
per plant
施氮量N rate 3 246.81** 13.22** 116.26** 147.41** 9.17** 3.12 46.52** 480.77**
ZNC 1 168.55** 0.93 47.48** 47.34** 6.69* 0.73 0.16 27.29**
施氮量×ZNC
N rate×ZNC		 2 24.67** 6.53* 5.56* 11.74** 3.26 3.27 5.84* 62.54**

Table 3

Analysis of variance (F value) of yield, nitrogen absorption and net income of pakchoi under combined application of ZNC"

变异来源
Source of variation		 自由度
df		 产量
Yield		 氮素积累量
N accumulation		 氮素农学效率
N agronomic efficiency		 氮肥偏生产力
N partial productivity		 净收益
Net income
施氮量N rate 3 478.48** 286.75** 25.97** 1114.20** 434.82**
ZNC 1 27.13** 0.23 130.07** 130.12** 27.45**
施氮量×ZNC N rate×ZNC 2 62.31** 1.83 133.09** 133.12** 61.68**

Table 4

Effects of combined application of ZNC on economic benefits of pakchoi"

处理
Treatment		 产量
Yield (t/hm2)		 肥料投入（元/hm2）
Fertilizer input (yuan/hm2)		 总成本（元/hm2）
Total cost (yuan/hm2)		 产值（万元/hm2）
Output value (×104 yuan/hm2)		 净收益（万元/hm2）
Net income (×104 yuan/hm2)
CK 14.71±0.66f 3807.70 8 307.70 2.94±0.13f 2.11±0.13e
2/3U 20.18±0.12e 5059.88 9 559.88 4.04±0.03e 3.08±0.02d
2/3UZ 22.30±0.18d 5062.25 9 562.25 4.46±0.03d 3.50±0.03c
U 22.97±0.10d 5685.96 10 185.96 4.59±0.02d 3.58±0.02c
UZ 27.48±0.18c 5688.55 10 188.55 5.50±0.04c 4.48±0.03b
4/3U 31.02±0.09a 6520.75 11 020.75 6.20±0.02a 5.10±0.02a
4/3UZ 28.49±0.44b 6523.55 11 023.55 5.70±0.09b 4.60±0.09b
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