Crops ›› 2021, Vol. 37 ›› Issue (4): 118-122.doi: 10.16035/j.issn.1001-7283.2021.04.018

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Effects of Nitrogen Fertilizer on Yield and Nitrogen Use Characteristics in Waxy Sorghum Cultivar "Hongyingzi"

Gao Jie1(), Feng Guangcai2, Li Xiaorong3, Li Qingfeng1, Wang Can1, Zhang Guobing1, Zhou Lengbo1, Peng Qiu1()   

  1. 1Guizhou Institute of Upland Crops/Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China
    2Poverty Alleviation and Development Office of Qiandongnan Prefecture, Kaili 556000, Guizhou, China
    3Chuxiong Autonomous Prefecture Academy of Agricultural Sciences, Chuxiong 675000, Yunnan, China
  • Received:2020-07-10 Revised:2020-10-27 Online:2021-08-15 Published:2021-08-13
  • Contact: Peng Qiu E-mail:gaojie396300520@163.com;p5615@sina.com

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Abstract:

To explore the high-efficiency utilization technology of nitrogen fertilizer in waxy sorghum in Guizhou, the yield, nitrogen uptake and utilization characteristics of waxy sorghum cultivar “Hongyingzi” were studied with different nitrogen applications rates (0, 120, 240, 360, 480 and 600kg/ha), numbered N0, N120, N240, N360, N480, and N600. The results showed that the yield, dry matter accumulation, and nitrogen accumulation presented the trend of increasing first and then decreasing with the increase of nitrogen application rates. Compared with the N0, the yield, dry matter accumulation, and nitrogen accumulation of N- application treatments significantly increased, while the treatment of N240 had the highest increase, increasing by 28.87%, 35.83%, and 49.62%, respectively. With the increasing of nitrogen application rate, nitrogen apparent recovery, nitrogen fertilizer efficiency, nitrogen recovery efficiency, nitrogen partial fertilizer productivity, and value cost ratio decreased. The quadratic polynomial and square root model were used to fit the effects of nitrogen application on yield and benefit of waxy sorghum and the highest yield was obtained by nitrogen application rates 294.5 and 252.6kg/ha, respectively. The maximum benefit was obtained by nitrogen application rates 168.2 and 132.7kg/ha. In consideration of yield, benefit, and nitrogen use efficiency, it was reasonable to apply 120-240kg/ha nitrogen fertilizer under the experimental conditions.

Key words: Waxy sorghum, Yield, Dry matter accumulation, Nitrogen use efficiency

Fig.1

Effects of different nitrogen levels on yield, DMA, and TNA of waxy sorghum Different letters mean significant differences (P < 0.05)"

Table 1

Effects of different nitrogen levels on nitrogen utilization parameters of waxy sorghum"

处理 Treatment NHI (%) NUE (kg/kg) NDMPE (kg/kg DM) NAE (kg/kg DM) NRE (%) NPFP (kg/kg) NARR (%) NFAE (kg/kg)
N0 47.93b 27.40a 92.24a – – – – –
N120 49.84b 24.86b 87.71b 29.59a 39.66a 38.38a 154.37a 6.94a
N240 52.55a 23.60bc 83.74cd 18.96b 28.46b 20.25b 85.82b 4.54b
N360 49.91b 23.19bc 86.17b 9.23c 13.41c 12.42c 51.65c 1.94c
N480 48.94b 23.14bc 84.20c 5.51d 9.28d 8.78d 37.96d 0.93cd
N600 48.64b 22.53c 81.69d 2.94e 6.56e 6.65e 29.50e 0.36d

Table 2

Benefit of waxy sorghum under different nitrogen application levels"

处理Treatment 产量
Yield
(kg/hm2)		 产值 (元/hm2)
Output value
(yuan/hm2)		 肥料投入 (元/hm2)
Fertilizer input
(yuan/hm2)		 净利润 (元/hm2)
Net profit (yuan/hm2)		 氮平衡
N balance
(kg/hm2)		 增收 (元/hm2)
Increased income
(yuan/hm2)		 产投比
Value cost ratio
N0 3 772.22c 22 633.33c 1 302.75 21 330.58 -137.66 – –
N120 4 605.56a 27 633.33a 1 824.75 25 808.58 -65.25 4 478.00 2.45
N240 4 861.11a 29 166.67a 2 346.75 26 819.92 34.03 5 489.33 2.34
N360 4 472.22b 26 833.33b 2 868.75 23 964.58 175.74 2 634.00 0.92
N480 4 216.67b 25 300.00b 3 390.75 21 909.25 297.78 578.67 0.17
N600 3 988.89c 23 933.33c 3 912.75 20 020.58 422.98 -1 310.00 -0.33

Table 3

R2, effect model and optimum nitrogen rate of different modes"

产出 Production 模型Model 效应方程 Effect model 决定系数 R2 最佳施氮量 Optimum N rate (kg/hm2)
产量 Yield 二次多项式 y=3915.67+5.36x-0.0091x2 0.7901** 294.5
平方根 y=22191.29+27.79x-0.055x2 0.8270** 252.6
净利润 Net profit 二次多项式 y=3760.56+149.66x0.5-5.77x 0.9458** 168.2
平方根 y=21260.61+897.96x0.5-38.98x 0.9948** 132.7
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